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Proceedings Paper

Analysis of fiber-based coherent detection employing optical preamplifier and time-domain filter
Author(s): Youming Chen; William Torruellas; Brian L. Mark; Ralph Burnham; Horacio Verdun
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Paper Abstract

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.

Paper Details

Date Published: 20 October 2006
PDF: 10 pages
Proc. SPIE 6371, Photonic Sensing Technologies, 63710D (20 October 2006); doi: 10.1117/12.686208
Show Author Affiliations
Youming Chen, Fibertek, Inc. (United States)
William Torruellas, Fibertek, Inc. (United States)
Brian L. Mark, George Mason Univ. (United States)
Ralph Burnham, Fibertek, Inc. (United States)
Horacio Verdun, Fibertek, Inc. (United States)

Published in SPIE Proceedings Vol. 6371:
Photonic Sensing Technologies
Michael A. Marcus; Brian Culshaw; John P. Dakin, Editor(s)

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