Study on the multi-signal processing performance of optical coherent detection systems

DENG De-ying; HE Ning; LIAO Xin

doi:10.3969/j.issn.1001-3806.2011.02.029

LASER TECHNOLOGY > 2011 > 35(2): 249-251. > DOI: 10.3969/j.issn.1001-3806.2011.02.029

DENG De-ying, HE Ning, LIAO Xin. Study on the multi-signal processing performance of optical coherent detection systems[J]. LASER TECHNOLOGY, 2011, 35(2): 249-251. DOI: 10.3969/j.issn.1001-3806.2011.02.029

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Study on the multi-signal processing performance of optical coherent detection systems

School of Information and Communication, Guilin University of Electronic Technology, Guilin 541004, China

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Received Date: April 28, 2010
Revised Date: July 18, 2010
Published Date: March 24, 2011

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In order to solve multi-signal processing simultaneously in an optical coherent receiver system,a frequency measurement system that employs acousto-optic deflection technology and fiber-based coherent optical detection was designed based on acousto-optic deflection principle and characteristics of multiple signals co-existing and transmitting in the complex and dense electromagnetic environment.The acousto-optic interaction and beam deflection of different frequency signals were analyzed in theory.Through numerical simulation of multi-frequency intermodulation,the solution of reducing intermodulation of multiple signals was obtained.An experimental platform for handling multiple signals was constructed with space light injecting into fiber. Experimental result shows that real-time signal capture capability of the system is very strong and carrier frequency measurement of multi-signal can be realized in the system bandwidth.The test data displays that the frequency resolution is less than 0.1 MHz and the interception rate is up to 100%.
- laser technique,
- parallel signal processing,
- coherent detection,
- acousto-optic deflection

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