[{"doi":"10.1103/cwsx-42c4","language":[{"iso":"eng"}],"article_number":"034031","intvolume":"        25","publication_status":"published","date_updated":"2026-03-25T07:59:04Z","author":[{"full_name":"Roeder, Franz","last_name":"Roeder","first_name":"Franz","id":"88149"},{"full_name":"Pollmann, René","last_name":"Pollmann","first_name":"René","id":"78890"},{"full_name":"Quiring, Viktor","first_name":"Viktor","last_name":"Quiring"},{"id":"13244","last_name":"Eigner","orcid":"https://orcid.org/0000-0002-5693-3083","first_name":"Christof","full_name":"Eigner, Christof"},{"id":"27150","orcid":"0000-0003-4140-0556 ","first_name":"Benjamin","last_name":"Brecht","full_name":"Brecht, Benjamin"},{"id":"26263","full_name":"Silberhorn, Christine","last_name":"Silberhorn","first_name":"Christine"}],"publication_identifier":{"issn":["2331-7019"]},"title":"Toward integrated sensors for optimized optical coherence tomography with undetected photons","year":"2026","department":[{"_id":"15"},{"_id":"623"},{"_id":"288"}],"type":"journal_article","date_created":"2026-03-23T12:28:33Z","abstract":[{"text":"<jats:p>\r\n                    The development of practical sensors for optical coherence tomography (OCT) with undetected photons requires miniaturization via integration. To be practical, these sensors must exhibit a large spectral bandwidth and a high brightness, which are linked to a high axial resolution and a sufficient signal-to-noise ratio, respectively. Here, we combine these requirements in a scheme for OCT measurements with undetected photons based on nonlinear\r\n                    <a:math xmlns:a=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\">\r\n                      <a:mi>Ti</a:mi>\r\n                      <a:mo>:</a:mo>\r\n                      <a:msub>\r\n                        <a:mrow>\r\n                          <a:mi>Li</a:mi>\r\n                          <a:mi>Nb</a:mi>\r\n                          <a:mi mathvariant=\"normal\">O</a:mi>\r\n                        </a:mrow>\r\n                        <a:mn>3</a:mn>\r\n                      </a:msub>\r\n                    </a:math>\r\n                    waveguides. We investigate the performance benchmarks of the commonly used SU(1,1) scheme in comparison to an induced-coherence scheme and find that the latter is actually better suited when implementing measurements with undetected photons in integrated systems. In both schemes, we perform pump-gain optimization and OCT measurements with undetected photons with an axial resolution as low as\r\n                    <d:math xmlns:d=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\">\r\n                      <d:mn>28</d:mn>\r\n                      <d:mspace width=\"0.2em\"/>\r\n                      <d:mtext fontfamily=\"times\">μ</d:mtext>\r\n                      <d:mrow>\r\n                        <d:mi mathvariant=\"normal\">m</d:mi>\r\n                      </d:mrow>\r\n                    </d:math>\r\n                    .\r\n                  </jats:p>","lang":"eng"}],"publication":"Physical Review Applied","issue":"3","volume":25,"user_id":"27150","publisher":"American Physical Society (APS)","_id":"65094","status":"public","citation":{"ieee":"F. Roeder, R. Pollmann, V. Quiring, C. Eigner, B. Brecht, and C. Silberhorn, “Toward integrated sensors for optimized optical coherence tomography with undetected photons,” <i>Physical Review Applied</i>, vol. 25, no. 3, Art. no. 034031, 2026, doi: <a href=\"https://doi.org/10.1103/cwsx-42c4\">10.1103/cwsx-42c4</a>.","apa":"Roeder, F., Pollmann, R., Quiring, V., Eigner, C., Brecht, B., &#38; Silberhorn, C. (2026). Toward integrated sensors for optimized optical coherence tomography with undetected photons. <i>Physical Review Applied</i>, <i>25</i>(3), Article 034031. <a href=\"https://doi.org/10.1103/cwsx-42c4\">https://doi.org/10.1103/cwsx-42c4</a>","short":"F. Roeder, R. Pollmann, V. Quiring, C. Eigner, B. Brecht, C. Silberhorn, Physical Review Applied 25 (2026).","chicago":"Roeder, Franz, René Pollmann, Viktor Quiring, Christof Eigner, Benjamin Brecht, and Christine Silberhorn. “Toward Integrated Sensors for Optimized Optical Coherence Tomography with Undetected Photons.” <i>Physical Review Applied</i> 25, no. 3 (2026). <a href=\"https://doi.org/10.1103/cwsx-42c4\">https://doi.org/10.1103/cwsx-42c4</a>.","mla":"Roeder, Franz, et al. “Toward Integrated Sensors for Optimized Optical Coherence Tomography with Undetected Photons.” <i>Physical Review Applied</i>, vol. 25, no. 3, 034031, American Physical Society (APS), 2026, doi:<a href=\"https://doi.org/10.1103/cwsx-42c4\">10.1103/cwsx-42c4</a>.","bibtex":"@article{Roeder_Pollmann_Quiring_Eigner_Brecht_Silberhorn_2026, title={Toward integrated sensors for optimized optical coherence tomography with undetected photons}, volume={25}, DOI={<a href=\"https://doi.org/10.1103/cwsx-42c4\">10.1103/cwsx-42c4</a>}, number={3034031}, journal={Physical Review Applied}, publisher={American Physical Society (APS)}, author={Roeder, Franz and Pollmann, René and Quiring, Viktor and Eigner, Christof and Brecht, Benjamin and Silberhorn, Christine}, year={2026} }","ama":"Roeder F, Pollmann R, Quiring V, Eigner C, Brecht B, Silberhorn C. Toward integrated sensors for optimized optical coherence tomography with undetected photons. <i>Physical Review Applied</i>. 2026;25(3). doi:<a href=\"https://doi.org/10.1103/cwsx-42c4\">10.1103/cwsx-42c4</a>"}},{"citation":{"chicago":"Pollmann, René, Franz Roeder, Christine Silberhorn, and Benjamin Brecht. “Limitations of Entangled Two-Photon Absorption Detection.” <i>Physical Review A</i> 114, no. 1 (2026). <a href=\"https://doi.org/10.1103/qpb1-hk5l\">https://doi.org/10.1103/qpb1-hk5l</a>.","short":"R. Pollmann, F. Roeder, C. Silberhorn, B. Brecht, Physical Review A 114 (2026).","ieee":"R. Pollmann, F. Roeder, C. Silberhorn, and B. Brecht, “Limitations of entangled two-photon absorption detection,” <i>Physical Review A</i>, vol. 114, no. 1, Art. no. 013718, 2026, doi: <a href=\"https://doi.org/10.1103/qpb1-hk5l\">10.1103/qpb1-hk5l</a>.","apa":"Pollmann, R., Roeder, F., Silberhorn, C., &#38; Brecht, B. (2026). Limitations of entangled two-photon absorption detection. <i>Physical Review A</i>, <i>114</i>(1), Article 013718. <a href=\"https://doi.org/10.1103/qpb1-hk5l\">https://doi.org/10.1103/qpb1-hk5l</a>","bibtex":"@article{Pollmann_Roeder_Silberhorn_Brecht_2026, title={Limitations of entangled two-photon absorption detection}, volume={114}, DOI={<a href=\"https://doi.org/10.1103/qpb1-hk5l\">10.1103/qpb1-hk5l</a>}, number={1013718}, journal={Physical Review A}, publisher={American Physical Society (APS)}, author={Pollmann, René and Roeder, Franz and Silberhorn, Christine and Brecht, Benjamin}, year={2026} }","ama":"Pollmann R, Roeder F, Silberhorn C, Brecht B. Limitations of entangled two-photon absorption detection. <i>Physical Review A</i>. 2026;114(1). doi:<a href=\"https://doi.org/10.1103/qpb1-hk5l\">10.1103/qpb1-hk5l</a>","mla":"Pollmann, René, et al. “Limitations of Entangled Two-Photon Absorption Detection.” <i>Physical Review A</i>, vol. 114, no. 1, 013718, American Physical Society (APS), 2026, doi:<a href=\"https://doi.org/10.1103/qpb1-hk5l\">10.1103/qpb1-hk5l</a>."},"oa":"1","status":"public","volume":114,"user_id":"78890","_id":"66583","publisher":"American Physical Society (APS)","abstract":[{"lang":"eng","text":"We introduce a method for determining the sensitivity of any given entangled two-photon absorption (ETPA) measurement. By modeling all signal and noise contributions to the measurement, we derive a single numerical value that describes the sensitivity of the ETPA measurement in Göppert-Mayer units. This allows us to directly compare vastly different experimental approaches and determine whether ETPA will be detectable under the given conditions. Therefore we can quantify the effect of any change to a given experimental apparatus and identify the ideal optimization pathway."}],"issue":"1","publication":"Physical Review A","department":[{"_id":"623"},{"_id":"15"}],"type":"journal_article","date_created":"2026-07-24T10:53:18Z","article_type":"original","intvolume":"       114","publication_status":"published","date_updated":"2026-07-24T11:00:08Z","author":[{"id":"78890","full_name":"Pollmann, René","last_name":"Pollmann","first_name":"René"},{"full_name":"Roeder, Franz","first_name":"Franz","last_name":"Roeder","id":"88149"},{"id":"26263","last_name":"Silberhorn","first_name":"Christine","full_name":"Silberhorn, Christine"},{"id":"27150","full_name":"Brecht, Benjamin","last_name":"Brecht","first_name":"Benjamin","orcid":"0000-0003-4140-0556 "}],"publication_identifier":{"issn":["2469-9926","2469-9934"]},"title":"Limitations of entangled two-photon absorption detection","year":"2026","doi":"10.1103/qpb1-hk5l","language":[{"iso":"eng"}],"article_number":"013718","main_file_link":[{"open_access":"1","url":"https://journals.aps.org/pra/abstract/10.1103/qpb1-hk5l"}]},{"publication_status":"published","date_updated":"2026-08-18T10:21:29Z","intvolume":"        28","year":"2026","title":"High-gain effects in broadband continuous-wave parametric down conversion sources and measurements with undetected photons","publication_identifier":{"issn":["1367-2630"]},"author":[{"first_name":"Martin","last_name":"Houde","full_name":"Houde, Martin"},{"id":"88149","first_name":"Franz","last_name":"Roeder","full_name":"Roeder, Franz"},{"id":"26263","last_name":"Silberhorn","first_name":"Christine","full_name":"Silberhorn, Christine"},{"full_name":"Brecht, Benjamin","orcid":"0000-0003-4140-0556 ","last_name":"Brecht","first_name":"Benjamin","id":"27150"},{"full_name":"Quesada, Nicolás","last_name":"Quesada","first_name":"Nicolás"}],"doi":"10.1088/1367-2630/ae8692","article_number":"074509","language":[{"iso":"eng"}],"abstract":[{"text":"<jats:title>Abstract</jats:title>\r\n                  <jats:p>\r\n                    We study theoretically how high-gain effects affect the measurement outcome of visible signal spectra in undetected photon measurement schemes. We consider two interferometric configurations: firstly, the SU(1,1) interferometer where the idler incurs loss and additional dispersion in between two identical, lossless, squeezers; secondly, the induced coherence interferometer where the idler incurs loss and additional dispersion in between two identical, lossless, squeezers and where the second squeezer is seeded by the idler and a vacuum ancilla mode. Furthermore, we consider a distributed loss configuration where the idler incurs loss as it propagates in the nonlinear medium. Motivated by experimental evidence and due to the fact that broadband sources are ideal for these measurement schemes, we use the dispersive data of a third-order dispersion engineered integrated waveguide parametric down conversion (PDC) source presented in Roeder\r\n                    <jats:italic>et al</jats:italic>\r\n                    (2024 New J. Phys.\r\n                    <jats:bold>26</jats:bold>\r\n                    123025) to model the PDC spectra in the three configurations. For each configuration we consider the case of idler-only (i) absorption, (ii) additional dispersion, and (iii) the combined effects. We obtain results which outline the strength and weaknesses of the different configurations at different operation points.\r\n                  </jats:p>","lang":"eng"}],"issue":"7","publication":"New Journal of Physics","type":"journal_article","department":[{"_id":"15"},{"_id":"623"},{"_id":"288"}],"date_created":"2026-08-18T10:21:08Z","status":"public","user_id":"27150","volume":28,"_id":"66741","publisher":"IOP Publishing","citation":{"mla":"Houde, Martin, et al. “High-Gain Effects in Broadband Continuous-Wave Parametric down Conversion Sources and Measurements with Undetected Photons.” <i>New Journal of Physics</i>, vol. 28, no. 7, 074509, IOP Publishing, 2026, doi:<a href=\"https://doi.org/10.1088/1367-2630/ae8692\">10.1088/1367-2630/ae8692</a>.","ama":"Houde M, Roeder F, Silberhorn C, Brecht B, Quesada N. High-gain effects in broadband continuous-wave parametric down conversion sources and measurements with undetected photons. <i>New Journal of Physics</i>. 2026;28(7). doi:<a href=\"https://doi.org/10.1088/1367-2630/ae8692\">10.1088/1367-2630/ae8692</a>","bibtex":"@article{Houde_Roeder_Silberhorn_Brecht_Quesada_2026, title={High-gain effects in broadband continuous-wave parametric down conversion sources and measurements with undetected photons}, volume={28}, DOI={<a href=\"https://doi.org/10.1088/1367-2630/ae8692\">10.1088/1367-2630/ae8692</a>}, number={7074509}, journal={New Journal of Physics}, publisher={IOP Publishing}, author={Houde, Martin and Roeder, Franz and Silberhorn, Christine and Brecht, Benjamin and Quesada, Nicolás}, year={2026} }","apa":"Houde, M., Roeder, F., Silberhorn, C., Brecht, B., &#38; Quesada, N. (2026). High-gain effects in broadband continuous-wave parametric down conversion sources and measurements with undetected photons. <i>New Journal of Physics</i>, <i>28</i>(7), Article 074509. <a href=\"https://doi.org/10.1088/1367-2630/ae8692\">https://doi.org/10.1088/1367-2630/ae8692</a>","ieee":"M. Houde, F. Roeder, C. Silberhorn, B. Brecht, and N. Quesada, “High-gain effects in broadband continuous-wave parametric down conversion sources and measurements with undetected photons,” <i>New Journal of Physics</i>, vol. 28, no. 7, Art. no. 074509, 2026, doi: <a href=\"https://doi.org/10.1088/1367-2630/ae8692\">10.1088/1367-2630/ae8692</a>.","short":"M. Houde, F. Roeder, C. Silberhorn, B. Brecht, N. Quesada, New Journal of Physics 28 (2026).","chicago":"Houde, Martin, Franz Roeder, Christine Silberhorn, Benjamin Brecht, and Nicolás Quesada. “High-Gain Effects in Broadband Continuous-Wave Parametric down Conversion Sources and Measurements with Undetected Photons.” <i>New Journal of Physics</i> 28, no. 7 (2026). <a href=\"https://doi.org/10.1088/1367-2630/ae8692\">https://doi.org/10.1088/1367-2630/ae8692</a>."}},{"publisher":"IOP Publishing","_id":"66740","volume":8,"user_id":"27150","status":"public","citation":{"bibtex":"@article{Houde_Roeder_Silberhorn_Brecht_Quesada_2026, title={Quantum fisher information analysis for absorption measurements with undetected photons}, volume={8}, DOI={<a href=\"https://doi.org/10.1088/2515-7647/ae82a2\">10.1088/2515-7647/ae82a2</a>}, number={3035013}, journal={Journal of Physics: Photonics}, publisher={IOP Publishing}, author={Houde, Martin and Roeder, Franz and Silberhorn, Christine and Brecht, Benjamin and Quesada, Nicolás}, year={2026} }","ama":"Houde M, Roeder F, Silberhorn C, Brecht B, Quesada N. Quantum fisher information analysis for absorption measurements with undetected photons. <i>Journal of Physics: Photonics</i>. 2026;8(3). doi:<a href=\"https://doi.org/10.1088/2515-7647/ae82a2\">10.1088/2515-7647/ae82a2</a>","mla":"Houde, Martin, et al. “Quantum Fisher Information Analysis for Absorption Measurements with Undetected Photons.” <i>Journal of Physics: Photonics</i>, vol. 8, no. 3, 035013, IOP Publishing, 2026, doi:<a href=\"https://doi.org/10.1088/2515-7647/ae82a2\">10.1088/2515-7647/ae82a2</a>.","chicago":"Houde, Martin, Franz Roeder, Christine Silberhorn, Benjamin Brecht, and Nicolás Quesada. “Quantum Fisher Information Analysis for Absorption Measurements with Undetected Photons.” <i>Journal of Physics: Photonics</i> 8, no. 3 (2026). <a href=\"https://doi.org/10.1088/2515-7647/ae82a2\">https://doi.org/10.1088/2515-7647/ae82a2</a>.","short":"M. Houde, F. Roeder, C. Silberhorn, B. Brecht, N. Quesada, Journal of Physics: Photonics 8 (2026).","ieee":"M. Houde, F. Roeder, C. Silberhorn, B. Brecht, and N. Quesada, “Quantum fisher information analysis for absorption measurements with undetected photons,” <i>Journal of Physics: Photonics</i>, vol. 8, no. 3, Art. no. 035013, 2026, doi: <a href=\"https://doi.org/10.1088/2515-7647/ae82a2\">10.1088/2515-7647/ae82a2</a>.","apa":"Houde, M., Roeder, F., Silberhorn, C., Brecht, B., &#38; Quesada, N. (2026). Quantum fisher information analysis for absorption measurements with undetected photons. <i>Journal of Physics: Photonics</i>, <i>8</i>(3), Article 035013. <a href=\"https://doi.org/10.1088/2515-7647/ae82a2\">https://doi.org/10.1088/2515-7647/ae82a2</a>"},"language":[{"iso":"eng"}],"article_number":"035013","doi":"10.1088/2515-7647/ae82a2","author":[{"first_name":"Martin","last_name":"Houde","full_name":"Houde, Martin"},{"full_name":"Roeder, Franz","last_name":"Roeder","first_name":"Franz","id":"88149"},{"first_name":"Christine","last_name":"Silberhorn","full_name":"Silberhorn, Christine","id":"26263"},{"id":"27150","full_name":"Brecht, Benjamin","orcid":"0000-0003-4140-0556 ","first_name":"Benjamin","last_name":"Brecht"},{"last_name":"Quesada","first_name":"Nicolás","full_name":"Quesada, Nicolás"}],"publication_identifier":{"issn":["2515-7647"]},"title":"Quantum fisher information analysis for absorption measurements with undetected photons","year":"2026","intvolume":"         8","date_updated":"2026-08-18T10:20:54Z","publication_status":"published","date_created":"2026-08-18T10:20:21Z","department":[{"_id":"15"},{"_id":"623"},{"_id":"288"}],"type":"journal_article","issue":"3","publication":"Journal of Physics: Photonics","abstract":[{"lang":"eng","text":"<jats:title>Abstract</jats:title>\r\n                  <jats:p>\r\n                    We theoretically compare the quantum Fisher information (QFI) for three configurations of absorption spectroscopy with undetected idler photons: an SU(1,1) interferometer with inter-source idler loss, an induced-coherence (IC) setup in which the idler partially seeds a second squeezer together with a vacuum ancilla, and a distributed-loss (DL) scheme with in-medium attenuation. We calculate the QFI as a function of parametric gain for both full and signal-only detection access. For losses below 99% and low to moderate gain, the SU(1,1) configuration provides the largest QFI. At high gain and intermediate loss, the IC scheme performs best, while under extreme attenuation (transmission\r\n                    <jats:inline-formula>\r\n                      <jats:tex-math>\r\n                        \r\n                      </jats:tex-math>\r\n                      <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\" overflow=\"scroll\">\r\n                        <mml:mrow>\r\n                          <mml:mo>&lt;</mml:mo>\r\n                        </mml:mrow>\r\n                      </mml:math>\r\n                    </jats:inline-formula>\r\n                    1%) the DL model becomes optimal. These results delineate the measurement regimes in which each architecture is optimal in terms of information theory.\r\n                  </jats:p>"}]},{"oa":"1","quality_controlled":"1","citation":{"ieee":"F. Roeder <i>et al.</i>, “Lithium niobate tantalate mixed crystals: a versatile platform for nonlinear quantum processes,” <i>Optical Materials Express</i>, vol. 16, no. 8, Art. no. 2668, 2026, doi: <a href=\"https://doi.org/10.1364/ome.592892\">10.1364/ome.592892</a>.","apa":"Roeder, F., Rüsing, M., Hehemann, T., Gnanavel, A., Eigner, C., Brecht, B., Imlau, M., &#38; Silberhorn, C. (2026). Lithium niobate tantalate mixed crystals: a versatile platform for nonlinear quantum processes. <i>Optical Materials Express</i>, <i>16</i>(8), Article 2668. <a href=\"https://doi.org/10.1364/ome.592892\">https://doi.org/10.1364/ome.592892</a>","short":"F. Roeder, M. Rüsing, T. Hehemann, A. Gnanavel, C. Eigner, B. Brecht, M. Imlau, C. Silberhorn, Optical Materials Express 16 (2026).","chicago":"Roeder, Franz, Michael Rüsing, Tobias Hehemann, Abira Gnanavel, Christof Eigner, Benjamin Brecht, Mirco Imlau, and Christine Silberhorn. “Lithium Niobate Tantalate Mixed Crystals: A Versatile Platform for Nonlinear Quantum Processes.” <i>Optical Materials Express</i> 16, no. 8 (2026). <a href=\"https://doi.org/10.1364/ome.592892\">https://doi.org/10.1364/ome.592892</a>.","mla":"Roeder, Franz, et al. “Lithium Niobate Tantalate Mixed Crystals: A Versatile Platform for Nonlinear Quantum Processes.” <i>Optical Materials Express</i>, vol. 16, no. 8, 2668, Optica Publishing Group, 2026, doi:<a href=\"https://doi.org/10.1364/ome.592892\">10.1364/ome.592892</a>.","bibtex":"@article{Roeder_Rüsing_Hehemann_Gnanavel_Eigner_Brecht_Imlau_Silberhorn_2026, title={Lithium niobate tantalate mixed crystals: a versatile platform for nonlinear quantum processes}, volume={16}, DOI={<a href=\"https://doi.org/10.1364/ome.592892\">10.1364/ome.592892</a>}, number={82668}, journal={Optical Materials Express}, publisher={Optica Publishing Group}, author={Roeder, Franz and Rüsing, Michael and Hehemann, Tobias and Gnanavel, Abira and Eigner, Christof and Brecht, Benjamin and Imlau, Mirco and Silberhorn, Christine}, year={2026} }","ama":"Roeder F, Rüsing M, Hehemann T, et al. Lithium niobate tantalate mixed crystals: a versatile platform for nonlinear quantum processes. <i>Optical Materials Express</i>. 2026;16(8). doi:<a href=\"https://doi.org/10.1364/ome.592892\">10.1364/ome.592892</a>"},"user_id":"22501","volume":16,"_id":"66939","publisher":"Optica Publishing Group","funded_apc":"1","status":"public","type":"journal_article","department":[{"_id":"288"},{"_id":"623"},{"_id":"15"}],"date_created":"2026-09-02T11:53:45Z","abstract":[{"lang":"eng","text":"Many quantum optical applications in spectroscopy, communication and signal analysis rely on spectrally-engineered nonlinear optical interactions to target specific wavelengths or bandwidth. Here, in an established material platform like lithium niobate the achievable wavelength and bandwidth combinations are usually limited by the material’s dispersion and its birefringence. In this regard, mixed crystals of lithium niobate tantalate (LNT) promise a novel material platform, because they allow tuning the birefringence, which is central for type II phase matching devices. Crucially, LNT offers crystal  compositions without any birefringence, which still retain their second-order optical nonlinearity. Despite recent progress in the growth and fabrication of LNT, so far no works have investigated the unique properties of LNT for use in electro-optics, nonlinear or quantum optics. In this study, we explore nonlinear optical devices based on LNT for broad- and narrowband nonlinear optical interactions based on recently measured Sellmeier coefficients. Most interestingly, we find that compositions without birefringence allow the design of broadband, degenerate type II phase matching sources spanning the whole near- to mid-infrared range by only changing the poling period and pump wavelength. Such devices are not easily realizable in pure lithium niobate or lithium tantalate. This could potentially allow for\tmore flexible light sources and nonlinear devices in quantum metrology, quantum spectroscopy and quantum communication."}],"publication":"Optical Materials Express","issue":"8","doi":"10.1364/ome.592892","article_number":"2668","main_file_link":[{"url":"https://doi.org/10.1364/OME.592892","open_access":"1"}],"language":[{"iso":"eng"}],"publication_status":"published","date_updated":"2026-09-02T13:35:22Z","article_type":"original","intvolume":"        16","year":"2026","title":"Lithium niobate tantalate mixed crystals: a versatile platform for nonlinear quantum processes","author":[{"first_name":"Franz","last_name":"Roeder","full_name":"Roeder, Franz","id":"88149"},{"first_name":"Michael","orcid":"0000-0003-4682-4577","last_name":"Rüsing","full_name":"Rüsing, Michael","id":"22501"},{"full_name":"Hehemann, Tobias","last_name":"Hehemann","first_name":"Tobias"},{"id":"81424","last_name":"Gnanavel","first_name":"Abira","full_name":"Gnanavel, Abira"},{"first_name":"Christof","orcid":"https://orcid.org/0000-0002-5693-3083","last_name":"Eigner","full_name":"Eigner, Christof","id":"13244"},{"id":"27150","full_name":"Brecht, Benjamin","orcid":"0000-0003-4140-0556 ","first_name":"Benjamin","last_name":"Brecht"},{"full_name":"Imlau, Mirco","first_name":"Mirco","last_name":"Imlau"},{"first_name":"Christine","last_name":"Silberhorn","full_name":"Silberhorn, Christine","id":"26263"}],"publication_identifier":{"issn":["2159-3930"]}},{"oa":"1","citation":{"bibtex":"@article{Babel_Bollmers_Roeder_Ridder_Golla_Köthemann_Reineke_Herrmann_Brecht_Eigner_et al._2025, title={Ultrabright, two-color photon pair source based on thin-film lithium niobate for bridging visible and telecom wavelengths}, volume={33}, DOI={<a href=\"https://doi.org/10.1364/oe.571605\">10.1364/oe.571605</a>}, number={2552729}, journal={Optics Express}, publisher={Optica Publishing Group}, author={Babel, Silia and Bollmers, Laura and Roeder, Franz and Ridder, Werner and Golla, Christian and Köthemann, Ronja and Reineke, Bernhard and Herrmann, Harald and Brecht, Benjamin and Eigner, Christof and et al.}, year={2025} }","ama":"Babel S, Bollmers L, Roeder F, et al. Ultrabright, two-color photon pair source based on thin-film lithium niobate for bridging visible and telecom wavelengths. <i>Optics Express</i>. 2025;33(25). doi:<a href=\"https://doi.org/10.1364/oe.571605\">10.1364/oe.571605</a>","mla":"Babel, Silia, et al. “Ultrabright, Two-Color Photon Pair Source Based on Thin-Film Lithium Niobate for Bridging Visible and Telecom Wavelengths.” <i>Optics Express</i>, vol. 33, no. 25, 52729, Optica Publishing Group, 2025, doi:<a href=\"https://doi.org/10.1364/oe.571605\">10.1364/oe.571605</a>.","short":"S. Babel, L. Bollmers, F. Roeder, W. Ridder, C. Golla, R. Köthemann, B. Reineke, H. Herrmann, B. Brecht, C. Eigner, L. Padberg, C. Silberhorn, Optics Express 33 (2025).","chicago":"Babel, Silia, Laura Bollmers, Franz Roeder, Werner Ridder, Christian Golla, Ronja Köthemann, Bernhard Reineke, et al. “Ultrabright, Two-Color Photon Pair Source Based on Thin-Film Lithium Niobate for Bridging Visible and Telecom Wavelengths.” <i>Optics Express</i> 33, no. 25 (2025). <a href=\"https://doi.org/10.1364/oe.571605\">https://doi.org/10.1364/oe.571605</a>.","ieee":"S. Babel <i>et al.</i>, “Ultrabright, two-color photon pair source based on thin-film lithium niobate for bridging visible and telecom wavelengths,” <i>Optics Express</i>, vol. 33, no. 25, Art. no. 52729, 2025, doi: <a href=\"https://doi.org/10.1364/oe.571605\">10.1364/oe.571605</a>.","apa":"Babel, S., Bollmers, L., Roeder, F., Ridder, W., Golla, C., Köthemann, R., Reineke, B., Herrmann, H., Brecht, B., Eigner, C., Padberg, L., &#38; Silberhorn, C. (2025). Ultrabright, two-color photon pair source based on thin-film lithium niobate for bridging visible and telecom wavelengths. <i>Optics Express</i>, <i>33</i>(25), Article 52729. <a href=\"https://doi.org/10.1364/oe.571605\">https://doi.org/10.1364/oe.571605</a>"},"volume":33,"user_id":"63231","_id":"63091","publisher":"Optica Publishing Group","status":"public","department":[{"_id":"288"},{"_id":"623"}],"type":"journal_article","date_created":"2025-12-15T07:20:36Z","abstract":[{"text":"We present the design and characterization of a guided-wave, bright, and highly frequency non-degenerate parametric down-conversion (PDC) source in thin-film lithium niobate. The source generates photon pairs with wavelengths of 815 nm and 1550 nm, linking the visible wavelength regime with telecommunication wavelengths. We confirm the high quality of the generated single photons by determining a value for the heralded second-order correlation function as low as g_h^(2)=(6.7+/-1.1)*10^8-3). Furthermore, we achieve a high spectral brightness of 0.44·10pairs/(smWGHz) which is two orders of magnitude higher than sources based on weakly guiding waveguides. The shape of the PDC spectrum and the strong agreement between the effective and nominal bandwidth highlight our high fabrication quality of periodically poled waveguides. The good agreement between the measured and simulated spectral characteristics of our source demonstrates our excellent understanding of the PDC process. Our result is a valuable step towards practical and scalable quantum communication networks as well as photonic quantum computing.","lang":"eng"}],"publication":"Optics Express","issue":"25","doi":"10.1364/oe.571605","language":[{"iso":"eng"}],"article_number":"52729","main_file_link":[{"open_access":"1","url":"https://opg.optica.org/oe/fulltext.cfm?uri=oe-33-25-52729"}],"article_type":"original","intvolume":"        33","publication_status":"published","date_updated":"2026-01-07T11:28:35Z","publication_identifier":{"issn":["1094-4087"]},"author":[{"first_name":"Silia","orcid":"https://orcid.org/0000-0002-1568-2580","last_name":"Babel","full_name":"Babel, Silia","id":"63231"},{"full_name":"Bollmers, Laura","first_name":"Laura","last_name":"Bollmers","id":"61375"},{"id":"88149","first_name":"Franz","last_name":"Roeder","full_name":"Roeder, Franz"},{"id":"63574","full_name":"Ridder, Werner","first_name":"Werner","last_name":"Ridder"},{"first_name":"Christian","last_name":"Golla","full_name":"Golla, Christian","id":"40420"},{"full_name":"Köthemann, Ronja","last_name":"Köthemann","first_name":"Ronja"},{"id":"29821","last_name":"Reineke","first_name":"Bernhard","full_name":"Reineke, Bernhard"},{"id":"216","full_name":"Herrmann, Harald","first_name":"Harald","last_name":"Herrmann"},{"first_name":"Benjamin","last_name":"Brecht","orcid":"0000-0003-4140-0556 ","full_name":"Brecht, Benjamin","id":"27150"},{"orcid":"https://orcid.org/0000-0002-5693-3083","first_name":"Christof","last_name":"Eigner","full_name":"Eigner, Christof","id":"13244"},{"last_name":"Padberg","first_name":"Laura","full_name":"Padberg, Laura","id":"40300"},{"id":"26263","last_name":"Silberhorn","first_name":"Christine","full_name":"Silberhorn, Christine"}],"year":"2025","title":"Ultrabright, two-color photon pair source based on thin-film lithium niobate for bridging visible and telecom wavelengths"},{"project":[{"name":"MiLiQuant: Miniaturisierte Lichtquellen für den industriellen Einsatz in Quantensensoren und Quanten-Imaging-Systemen (MiLiQuant) - Teilvorhaben: Technologie und Theorie für MIR Quanten-Imaging Systeme","_id":"207","grant_number":"13N15065"},{"grant_number":"101070700","_id":"571","name":"MIRAQLS: MIRAQLS: Mid-infrared Quantum Technology for Sensing"},{"name":"E2TPA: Exploiting Entangled Two-Photon Absorption","_id":"190"}],"citation":{"mla":"Roeder, Franz, et al. “Measurement of Ultrashort Biphoton Correlation Times with an Integrated Two-Color Broadband SU(1,1)-Interferometer.” <i>PRX Quantum</i>, vol. 5, no. 2, 020350, American Physical Society (APS), 2024, doi:<a href=\"https://doi.org/10.1103/prxquantum.5.020350\">10.1103/prxquantum.5.020350</a>.","ama":"Roeder F, Pollmann R, Stefszky M, et al. Measurement of Ultrashort Biphoton Correlation Times with an Integrated Two-Color Broadband SU(1,1)-Interferometer. <i>PRX Quantum</i>. 2024;5(2). doi:<a href=\"https://doi.org/10.1103/prxquantum.5.020350\">10.1103/prxquantum.5.020350</a>","bibtex":"@article{Roeder_Pollmann_Stefszky_Santandrea_Luo_Quiring_Ricken_Eigner_Brecht_Silberhorn_2024, title={Measurement of Ultrashort Biphoton Correlation Times with an Integrated Two-Color Broadband SU(1,1)-Interferometer}, volume={5}, DOI={<a href=\"https://doi.org/10.1103/prxquantum.5.020350\">10.1103/prxquantum.5.020350</a>}, number={2020350}, journal={PRX Quantum}, publisher={American Physical Society (APS)}, author={Roeder, Franz and Pollmann, René and Stefszky, Michael and Santandrea, Matteo and Luo, Kai Hong and Quiring, V. and Ricken, Raimund and Eigner, Christof and Brecht, Benjamin and Silberhorn, Christine}, year={2024} }","apa":"Roeder, F., Pollmann, R., Stefszky, M., Santandrea, M., Luo, K. H., Quiring, V., Ricken, R., Eigner, C., Brecht, B., &#38; Silberhorn, C. (2024). Measurement of Ultrashort Biphoton Correlation Times with an Integrated Two-Color Broadband SU(1,1)-Interferometer. <i>PRX Quantum</i>, <i>5</i>(2), Article 020350. <a href=\"https://doi.org/10.1103/prxquantum.5.020350\">https://doi.org/10.1103/prxquantum.5.020350</a>","ieee":"F. Roeder <i>et al.</i>, “Measurement of Ultrashort Biphoton Correlation Times with an Integrated Two-Color Broadband SU(1,1)-Interferometer,” <i>PRX Quantum</i>, vol. 5, no. 2, Art. no. 020350, 2024, doi: <a href=\"https://doi.org/10.1103/prxquantum.5.020350\">10.1103/prxquantum.5.020350</a>.","short":"F. Roeder, R. Pollmann, M. Stefszky, M. Santandrea, K.H. Luo, V. Quiring, R. Ricken, C. Eigner, B. Brecht, C. Silberhorn, PRX Quantum 5 (2024).","chicago":"Roeder, Franz, René Pollmann, Michael Stefszky, Matteo Santandrea, Kai Hong Luo, V. Quiring, Raimund Ricken, Christof Eigner, Benjamin Brecht, and Christine Silberhorn. “Measurement of Ultrashort Biphoton Correlation Times with an Integrated Two-Color Broadband SU(1,1)-Interferometer.” <i>PRX Quantum</i> 5, no. 2 (2024). <a href=\"https://doi.org/10.1103/prxquantum.5.020350\">https://doi.org/10.1103/prxquantum.5.020350</a>."},"status":"public","volume":5,"user_id":"88149","publisher":"American Physical Society (APS)","_id":"54544","abstract":[{"lang":"eng","text":"The biphoton correlation time, a measure for the conditional uncertainty in the temporal arrival of two photons from a photon pair source, is a key performance identifier for many quantum spectroscopy applications, with shorter correlation times typically yielding better performance. Furthermore, it provides fundamental insight into the effects of dispersion on the biphoton state. Here, we show that a characteristic dependence of the width of the temporal interferogram can be exploited to obtain insights into the amount of second-order dispersion inside the interferometer and to retrieve actual and Fourier-limited ultrashort biphoton correlation times of around 100 fs. In the presented scheme, we simultaneously measure spectral and temporal interferograms at the output of an SU(1,1) interferometer based on an integrated broadband parametric down conversion source in a Ti:LiNbO3 waveguide."}],"issue":"2","publication":"PRX Quantum","department":[{"_id":"288"},{"_id":"623"}],"type":"journal_article","date_created":"2024-06-01T12:48:51Z","intvolume":"         5","date_updated":"2024-06-01T13:00:53Z","publication_status":"published","author":[{"full_name":"Roeder, Franz","first_name":"Franz","last_name":"Roeder","id":"88149"},{"id":"78890","full_name":"Pollmann, René","first_name":"René","last_name":"Pollmann"},{"id":"42777","full_name":"Stefszky, Michael","last_name":"Stefszky","first_name":"Michael"},{"id":"55095","first_name":"Matteo","orcid":"0000-0001-5718-358X","last_name":"Santandrea","full_name":"Santandrea, Matteo"},{"id":"36389","orcid":"0000-0003-1008-4976","first_name":"Kai Hong","last_name":"Luo","full_name":"Luo, Kai Hong"},{"full_name":"Quiring, V.","first_name":"V.","last_name":"Quiring"},{"full_name":"Ricken, Raimund","last_name":"Ricken","first_name":"Raimund"},{"full_name":"Eigner, Christof","first_name":"Christof","orcid":"https://orcid.org/0000-0002-5693-3083","last_name":"Eigner","id":"13244"},{"id":"27150","last_name":"Brecht","orcid":"0000-0003-4140-0556 ","first_name":"Benjamin","full_name":"Brecht, Benjamin"},{"full_name":"Silberhorn, Christine","first_name":"Christine","last_name":"Silberhorn","id":"26263"}],"publication_identifier":{"issn":["2691-3399"]},"title":"Measurement of Ultrashort Biphoton Correlation Times with an Integrated Two-Color Broadband SU(1,1)-Interferometer","year":"2024","doi":"10.1103/prxquantum.5.020350","language":[{"iso":"eng"}],"article_number":"020350"},{"publication_identifier":{"issn":["1094-4087"]},"author":[{"last_name":"Pollmann","first_name":"René","full_name":"Pollmann, René","id":"78890"},{"id":"88149","full_name":"Roeder, Franz","last_name":"Roeder","first_name":"Franz"},{"full_name":"Quiring, Victor","first_name":"Victor","last_name":"Quiring"},{"first_name":"Raimund","last_name":"Ricken","full_name":"Ricken, Raimund"},{"full_name":"Eigner, Christof","first_name":"Christof","last_name":"Eigner","orcid":"https://orcid.org/0000-0002-5693-3083","id":"13244"},{"full_name":"Brecht, Benjamin","last_name":"Brecht","orcid":"0000-0003-4140-0556 ","first_name":"Benjamin","id":"27150"},{"full_name":"Silberhorn, Christine","last_name":"Silberhorn","first_name":"Christine","id":"26263"}],"title":"Integrated, bright broadband, two-colour parametric down-conversion source","year":"2024","article_type":"original","intvolume":"        32","publication_status":"published","date_updated":"2025-12-19T11:37:41Z","language":[{"iso":"eng"}],"article_number":"23945","doi":"10.1364/oe.522549","publication":"Optics Express","issue":"14","abstract":[{"text":"<jats:p>Broadband quantum light is a vital resource for quantum metrology and spectroscopy applications such as quantum optical coherence tomography or entangled two photon absorption. For entangled two photon absorption in particular, very high photon flux combined with high time-frequency entanglement is crucial for observing a signal. So far these conditions could be met by using high power lasers driving degenerate, type 0 bulk-crystal spontaneous parametric down conversion (SPDC) sources. This naturally limits the available wavelength ranges and precludes deterministic splitting of the generated output photons. In this work we demonstrate an integrated two-colour SPDC source utilising a group-velocity matched lithium niobate waveguide, reaching both exceptional brightness 1.52⋅10<jats:sup>6</jats:sup>pairssmWGHz and large bandwidth (7.8 THz FWHM) while pumped with a few mW of continuous wave (CW) laser light. By converting a narrow band pump to broadband pulses the created photon pairs show correlation times of Δ<jats:italic>τ</jats:italic> ≈ 120 fs while maintaining the narrow bandwidth Δ<jats:italic>ω</jats:italic><jats:sub>\r\n      <jats:italic>p</jats:italic>\r\n    </jats:sub> ≪ 1 MHz of the CW pump light, yielding strong time-frequency entanglement. Furthermore our process can be adapted to a wide range of central wavelengths.</jats:p>","lang":"eng"}],"date_created":"2024-06-19T06:58:17Z","department":[{"_id":"15"},{"_id":"623"},{"_id":"288"}],"type":"journal_article","status":"public","_id":"54815","publisher":"Optica Publishing Group","volume":32,"user_id":"78890","citation":{"mla":"Pollmann, René, et al. “Integrated, Bright Broadband, Two-Colour Parametric down-Conversion Source.” <i>Optics Express</i>, vol. 32, no. 14, 23945, Optica Publishing Group, 2024, doi:<a href=\"https://doi.org/10.1364/oe.522549\">10.1364/oe.522549</a>.","ama":"Pollmann R, Roeder F, Quiring V, et al. Integrated, bright broadband, two-colour parametric down-conversion source. <i>Optics Express</i>. 2024;32(14). doi:<a href=\"https://doi.org/10.1364/oe.522549\">10.1364/oe.522549</a>","bibtex":"@article{Pollmann_Roeder_Quiring_Ricken_Eigner_Brecht_Silberhorn_2024, title={Integrated, bright broadband, two-colour parametric down-conversion source}, volume={32}, DOI={<a href=\"https://doi.org/10.1364/oe.522549\">10.1364/oe.522549</a>}, number={1423945}, journal={Optics Express}, publisher={Optica Publishing Group}, author={Pollmann, René and Roeder, Franz and Quiring, Victor and Ricken, Raimund and Eigner, Christof and Brecht, Benjamin and Silberhorn, Christine}, year={2024} }","apa":"Pollmann, R., Roeder, F., Quiring, V., Ricken, R., Eigner, C., Brecht, B., &#38; Silberhorn, C. (2024). Integrated, bright broadband, two-colour parametric down-conversion source. <i>Optics Express</i>, <i>32</i>(14), Article 23945. <a href=\"https://doi.org/10.1364/oe.522549\">https://doi.org/10.1364/oe.522549</a>","ieee":"R. Pollmann <i>et al.</i>, “Integrated, bright broadband, two-colour parametric down-conversion source,” <i>Optics Express</i>, vol. 32, no. 14, Art. no. 23945, 2024, doi: <a href=\"https://doi.org/10.1364/oe.522549\">10.1364/oe.522549</a>.","short":"R. Pollmann, F. Roeder, V. Quiring, R. Ricken, C. Eigner, B. Brecht, C. Silberhorn, Optics Express 32 (2024).","chicago":"Pollmann, René, Franz Roeder, Victor Quiring, Raimund Ricken, Christof Eigner, Benjamin Brecht, and Christine Silberhorn. “Integrated, Bright Broadband, Two-Colour Parametric down-Conversion Source.” <i>Optics Express</i> 32, no. 14 (2024). <a href=\"https://doi.org/10.1364/oe.522549\">https://doi.org/10.1364/oe.522549</a>."}},{"date_created":"2024-12-27T19:01:14Z","department":[{"_id":"288"},{"_id":"623"},{"_id":"15"}],"type":"journal_article","issue":"12","publication":"New Journal of Physics","abstract":[{"lang":"eng","text":"The latest applications in ultrafast quantum metrology require bright, broadband bi-photon sources with one of the photons in the mid-infrared and the other in the visible to near infrared. However, existing sources based on bulk crystals are limited in brightness due to the short interaction length and only allow for limited dispersion engineering. Here, we present an integrated PDC source based on a Ti:LiNbO3 waveguide that generates broadband bi-photons with central wavelengths at 860 nm and 2800 nm. Their spectral bandwidth exceeds 25 THz and is achieved by simultaneous matching of the group velocities (GVs) and cancellation of GV dispersion for the signal and idler field. We provide an intuitive understanding of the process by studying our source’s behavior at different temperatures and pump wavelengths, which agrees well with simulations."}],"language":[{"iso":"eng"}],"article_number":"123025","doi":"10.1088/1367-2630/ad9f98","author":[{"last_name":"Roeder","first_name":"Franz","full_name":"Roeder, Franz","id":"88149"},{"id":"81424","full_name":"Gnanavel, Abira","first_name":"Abira","last_name":"Gnanavel"},{"full_name":"Pollmann, René","first_name":"René","last_name":"Pollmann","id":"78890"},{"last_name":"Brecht","first_name":"Olga","full_name":"Brecht, Olga"},{"id":"42777","last_name":"Stefszky","first_name":"Michael","full_name":"Stefszky, Michael"},{"id":"40300","full_name":"Padberg, Laura","last_name":"Padberg","first_name":"Laura"},{"id":"13244","first_name":"Christof","orcid":"https://orcid.org/0000-0002-5693-3083","last_name":"Eigner","full_name":"Eigner, Christof"},{"id":"26263","full_name":"Silberhorn, Christine","last_name":"Silberhorn","first_name":"Christine"},{"id":"27150","first_name":"Benjamin","orcid":"0000-0003-4140-0556 ","last_name":"Brecht","full_name":"Brecht, Benjamin"}],"publication_identifier":{"issn":["1367-2630"]},"year":"2024","title":"Ultra-broadband non-degenerate guided-wave bi-photon source in the near and mid-infrared","article_type":"original","intvolume":"        26","publication_status":"published","date_updated":"2026-09-02T14:54:23Z","citation":{"ama":"Roeder F, Gnanavel A, Pollmann R, et al. Ultra-broadband non-degenerate guided-wave bi-photon source in the near and mid-infrared. <i>New Journal of Physics</i>. 2024;26(12). doi:<a href=\"https://doi.org/10.1088/1367-2630/ad9f98\">10.1088/1367-2630/ad9f98</a>","bibtex":"@article{Roeder_Gnanavel_Pollmann_Brecht_Stefszky_Padberg_Eigner_Silberhorn_Brecht_2024, title={Ultra-broadband non-degenerate guided-wave bi-photon source in the near and mid-infrared}, volume={26}, DOI={<a href=\"https://doi.org/10.1088/1367-2630/ad9f98\">10.1088/1367-2630/ad9f98</a>}, number={12123025}, journal={New Journal of Physics}, publisher={IOP Publishing}, author={Roeder, Franz and Gnanavel, Abira and Pollmann, René and Brecht, Olga and Stefszky, Michael and Padberg, Laura and Eigner, Christof and Silberhorn, Christine and Brecht, Benjamin}, year={2024} }","mla":"Roeder, Franz, et al. “Ultra-Broadband Non-Degenerate Guided-Wave Bi-Photon Source in the near and Mid-Infrared.” <i>New Journal of Physics</i>, vol. 26, no. 12, 123025, IOP Publishing, 2024, doi:<a href=\"https://doi.org/10.1088/1367-2630/ad9f98\">10.1088/1367-2630/ad9f98</a>.","chicago":"Roeder, Franz, Abira Gnanavel, René Pollmann, Olga Brecht, Michael Stefszky, Laura Padberg, Christof Eigner, Christine Silberhorn, and Benjamin Brecht. “Ultra-Broadband Non-Degenerate Guided-Wave Bi-Photon Source in the near and Mid-Infrared.” <i>New Journal of Physics</i> 26, no. 12 (2024). <a href=\"https://doi.org/10.1088/1367-2630/ad9f98\">https://doi.org/10.1088/1367-2630/ad9f98</a>.","short":"F. Roeder, A. Gnanavel, R. Pollmann, O. Brecht, M. Stefszky, L. Padberg, C. Eigner, C. Silberhorn, B. Brecht, New Journal of Physics 26 (2024).","apa":"Roeder, F., Gnanavel, A., Pollmann, R., Brecht, O., Stefszky, M., Padberg, L., Eigner, C., Silberhorn, C., &#38; Brecht, B. (2024). Ultra-broadband non-degenerate guided-wave bi-photon source in the near and mid-infrared. <i>New Journal of Physics</i>, <i>26</i>(12), Article 123025. <a href=\"https://doi.org/10.1088/1367-2630/ad9f98\">https://doi.org/10.1088/1367-2630/ad9f98</a>","ieee":"F. Roeder <i>et al.</i>, “Ultra-broadband non-degenerate guided-wave bi-photon source in the near and mid-infrared,” <i>New Journal of Physics</i>, vol. 26, no. 12, Art. no. 123025, 2024, doi: <a href=\"https://doi.org/10.1088/1367-2630/ad9f98\">10.1088/1367-2630/ad9f98</a>."},"project":[{"name":"MIRAQLS: MIRAQLS: Mid-infrared Quantum Technology for Sensing","_id":"571"},{"name":"E2TPA: Exploiting Entangled Two-Photon Absorption","_id":"190"}],"publisher":"IOP Publishing","_id":"57862","volume":26,"user_id":"13244","status":"public"}]