Lasers frequency stabilization, channel identification, state of polarization, and their interaction in multichannel coherent optical systems

G. Di Maio; Monica Tesauri; Stefano Baroni; Piero Gambini

doi:10.1117/12.201292

17 February 1995 Lasers frequency stabilization, channel identification, state of polarization, and their interaction in multichannel coherent optical systems

G. Di Maio, Monica Tesauri, Stefano Baroni, Piero Gambini

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Proceedings Volume 2450, Broadband Networks: Strategies and Technologies; (1995) https://doi.org/10.1117/12.201292
Event: Advanced Networks and Services, 1995, Amsterdam, Netherlands

Abstract

Simple solutions to stabilize the frequency of the transmitter lasers and to eliminate the influence of the state of polarization on the receiver gain and frequency control signals and on the channel identification in a High Density Wavelength Division Multiplexing environment has been theoretically investigated and experimentally verified. It has been proved that, by using the proposed technique, the separation of such frequency is maintained constant within the limit of the beat linewidth. It has been proved also the ability of a mixer-based system in keeping constant the power of the control signal at the receiver. An improved scheme for channel identification based on a low pass filter, a zero-bias diode and a frequency-to-voltage converter is finally proposed and test results are presented. All the above-mentioned solutions have been tested on a 622 Mbit/s FSK multichannel coherent optical system.

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G. Di Maio, Monica Tesauri, Stefano Baroni, and Piero Gambini "Lasers frequency stabilization, channel identification, state of polarization, and their interaction in multichannel coherent optical systems", Proc. SPIE 2450, Broadband Networks: Strategies and Technologies, (17 February 1995); https://doi.org/10.1117/12.201292

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KEYWORDS

Polarization

Laser stabilization

Receivers

Coherent optics

Linear filtering

Optical filters

Transmitters

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