R. Noé and K. DROGEMULLER, “ACCURATE AND SIMPLE OPTICAL FREQUENCY STABILIZATION FOR A COHERENT MULTICHANNEL SYSTEM,”10.1109/68.136502__IEEE PHOTONICS TECHNOLOGY LETTERS, vol. 4, no. 5, pp. 505–506, 1992, doi:10.1109/68.136502 .

R. Noé, E. MEISSNER, B. BORCHERT, and H. RODLER, “DIRECT MODULATION 565 MB/S DPSK EXPERIMENT WITH 62.3 DB LOSS SPAN AND ENDLESS POLARIZATION CONTROL,”10.1109/68.163762__IEEE PHOTONICS TECHNOLOGY LETTERS, vol. 4, no. 10, pp. 1151–1154, 1992, doi:10.1109/68.163762 .

R. Noé et al., “OPTICAL AMPLIFIER WITH 27-DB DYNAMIC-RANGE IN A COHERENT TRANSMISSION-SYSTEM,”10.1109/68.47067__IEEE PHOTONICS TECHNOLOGY LETTERS, vol. 2, no. 2, pp. 120–121, 1990, doi:10.1109/68.47067 .

R. Noé et al., “OPTICAL AMPLIFIER WITH 27-DB DYNAMIC-RANGE IN A COHERENT TRANSMISSION-SYSTEM,”10.1109/68.47067__IEEE PHOTONICS TECHNOLOGY LETTERS, vol. 2, no. 2, pp. 120–121, 1990, doi:10.1109/68.47067 .