---
_id: '65094'
abstract:
- lang: eng
  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>"
article_number: '034031'
author:
- first_name: Franz
  full_name: Roeder, Franz
  id: '88149'
  last_name: Roeder
- first_name: René
  full_name: Pollmann, René
  id: '78890'
  last_name: Pollmann
- first_name: Viktor
  full_name: Quiring, Viktor
  last_name: Quiring
- first_name: Christof
  full_name: Eigner, Christof
  id: '13244'
  last_name: Eigner
  orcid: https://orcid.org/0000-0002-5693-3083
- first_name: Benjamin
  full_name: Brecht, Benjamin
  id: '27150'
  last_name: Brecht
  orcid: '0000-0003-4140-0556 '
- first_name: Christine
  full_name: Silberhorn, Christine
  id: '26263'
  last_name: Silberhorn
citation:
  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>
  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>
  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}
    }'
  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>.
  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>.'
  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>.
  short: F. Roeder, R. Pollmann, V. Quiring, C. Eigner, B. Brecht, C. Silberhorn,
    Physical Review Applied 25 (2026).
date_created: 2026-03-23T12:28:33Z
date_updated: 2026-03-25T07:59:04Z
department:
- _id: '15'
- _id: '623'
- _id: '288'
doi: 10.1103/cwsx-42c4
intvolume: '        25'
issue: '3'
language:
- iso: eng
publication: Physical Review Applied
publication_identifier:
  issn:
  - 2331-7019
publication_status: published
publisher: American Physical Society (APS)
status: public
title: Toward integrated sensors for optimized optical coherence tomography with undetected
  photons
type: journal_article
user_id: '27150'
volume: 25
year: '2026'
...