NDLI: Design of a Coherent Receiver Based on InAs Electron Avalanche Photodiode for Free-Space Optical Communications

Content Provider	IEEE Xplore Digital Library
Author	Ke Wen Yanli Zhao Jing Gao Shibo Zhang Junjie Tu
Copyright Year	1963
Abstract	In this paper, a coherent receiver based on InAs electron avalanche photodiode (e-APD) is designed for free-space optical (FSO) communications. According to the numerical simulations, it is found that the coherent receiver based on InAs e-APD can operate nearly in its shot-noise limit condition with a lower local oscillator (LO) power than traditional coherent receivers and get a better sensitivity improvement due to the gain provided by the coherent gain from the LO power and the internal gain of the e-APD. Hence, the multiple diversity receiver systems can be easier implemented and the number of the independent beams can be increased. In addition, this system is not sensitive to the change of the thermal noise of the coherent receiver and the dark current of the InAs e-APD that makes it more suitable for space environment. Furthermore, as the requirement of the internal gain for the InAs e-APD in this type of coherent receiver is not very high, the depletion region of InAs e-APD can be reduced. Hence, the coherent receiver based on InAs e-APD may become a potential choice in much higher speed FSO communication applications.
Sponsorship	IEEE Electron Devices Society
Starting Page	1932
Ending Page	1938
Page Count	7
File Size	1119976
File Format	PDF
ISSN	00189383
Volume Number	62
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Receivers Noise Sensitivity Dark current Gain Thermal noise Coherence multiple diversity receivers. Coherent receiver free-space optical (FSO) communications InAs electron avalanche photodiode (e-APD) multiple diversity receivers
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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