NDLI: Performance analysis of a noncoherently combined large aperture optical heterodyne receiver

Content Provider	IEEE Xplore Digital Library
Author	Chen, C.-C.
Copyright Year	1972
Abstract	The performance of a noncoherently combined, multiple-mirror heterodyne receiver is analyzed. In the absence of atmospheric turbulence, the performance of the noncoherently combined receiver is shown to be inferior to that of a monolithic, diffraction-limited receiver with equivalent aperture area. when atmospheric turbulence is taken into consideration, however, the efficiency of a monolithic aperture heterodyne receiver, is limited by the phase coherence length of the atmosphere, and generally does not improve with increasing aperture size. In contrast, the performance of a noncoherently combined system improves with an increasing number of receivers. Consequently, given a fixed collecting area, the noncoherently combined system can offer a superior performance. The performance of the noncoherently combined heterodyne receiver is studied by analyzing the combining loss of the receiver SNR (signal-to-noise ratio). It is shown that, given a constant collecting area, the performance of the combined receiver is optimized when the diameter of each of the individual receivers is on the order of the phase coherence length r/sub 0/ of the atmospheric turbulence.<>
Starting Page	1013
Ending Page	1021
Page Count	9
File Size	907210
File Format	PDF
ISSN	00906778
Volume Number	38
Issue Number	7
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1990-07-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Optical receivers Performance analysis Apertures Optical mixing Optical distortion Adaptive optics Atmosphere Interference Phase modulation Pulse modulation
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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