20 October 2006 Analysis of fiber-based coherent detection employing optical preamplifier and time-domain filter
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Proceedings Volume 6371, Photonic Sensing Technologies; 63710D (2006) https://doi.org/10.1117/12.686208
Event: Optics East 2006, 2006, Boston, Massachusetts, United States
We report on a novel fiber based coherent detection system employing an optical preamplifier, a spectrum bandpass filter, and a time-domain filter. The time-domain filter, a synchronous time gate, reduces the in-band Amplified Spontaneous Emission (ASE ) beat noise, which cannot be achieved by the spectrum bandpass filter alone. In preliminary experiments with a 100 GHz bandpass filter, no degradation is observed from the optically preamplified coherent detection compared to pure coherent detection. With a 10 ns pulse width, 500 kHz repetition rate, and 10 pW input power, 2.78 dB and 1 dB signal-to-noise (SNR) improvement has been achieved, respectively, when 5% and 50% time gating duty cycle is used.
© (2006) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Youming Chen, Youming Chen, William Torruellas, William Torruellas, Brian L. Mark, Brian L. Mark, Ralph Burnham, Ralph Burnham, Horacio Verdun, Horacio Verdun, } "Analysis of fiber-based coherent detection employing optical preamplifier and time-domain filter", Proc. SPIE 6371, Photonic Sensing Technologies, 63710D (20 October 2006); doi: 10.1117/12.686208; https://doi.org/10.1117/12.686208

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