Coherent pulse detection and multi-channel coherent detection based on a single balanced homodyne receiver
Optics Express, Vol. 15, Issue 5, pp. 2098-2105 (2007)
http://dx.doi.org/10.1364/OE.15.002098
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Abstract
The performance of coherent pulse detection (CPD) and multi-channel coherent detection (MCCD) based on a single dual-balanced homodyne receiver was experimentally demonstrated using a grating-coupled hybridly mode-locked semiconductor laser. Compared with direct detection, a high coherent gain of over 10 dB, as well as an SNR improvement of over 5 dB, was obtained in both detection schemes. Our experimental results have confirmed that the coherent detection processes in CPD and MCCD are nearly the same based on a square-root LO power dependence. Nevertheless, the MCCD scheme has shown an advantage in a path-length error over the CPD scheme, revealing 2~3 dB improvement in sensitivities.
© 2007 Optical Society of America
OCIS Codes
(060.1660) Fiber optics and optical communications : Coherent communications
(060.2920) Fiber optics and optical communications : Homodyning
(140.4050) Lasers and laser optics : Mode-locked lasers
ToC Category:
Fiber Optics and Optical Communications
History
Original Manuscript: February 7, 2007
Manuscript Accepted: February 11, 2007
Published: March 5, 2007
Citation
Wangkuen Lee, Hoss Izadpanah, Peter J. Delfyett, Ron Menendez, and Shahab Etemad, "Coherent pulse detection and multi-channel coherent detection based on a single balanced homodyne receiver," Opt. Express 15, 2098-2105 (2007)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-15-5-2098
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References
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