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Proceedings Paper

Expected Noise Levels For Interferometric Sensors Multiplexed Using Partially Coherent Light
Author(s): R. H. Wentworth; H. J. Shaw
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Paper Abstract

A method for multiplexing interferometric optical sensors is reviewed, and theoretical results are presented which predict the phase sensitivity of sensors multiplexed using this method. The multiplexing technique--"coherence multiplexing' is based on the use of a source whose coherence length is short compared to most system optical path length differences. The use of a single-mode semiconductor laser diode source typically leads to a min-imum detectable phase on the order of a milliradian per VHz. Small improvements result from the use of a noise-canceling balanced detection scheme. Sensitivity in the microradian per VHz regime might be achieved through the use of a shorter coherence length source such as a superluminescent diode.

Paper Details

Date Published: 3 January 1986
PDF: 6 pages
Proc. SPIE 0566, Fiber Optic and Laser Sensors III, (3 January 1986); doi: 10.1117/12.949792
Show Author Affiliations
R. H. Wentworth, AT&T Bell Laboratories (United States)
H. J. Shaw, Stanford University (United States)


Published in SPIE Proceedings Vol. 0566:
Fiber Optic and Laser Sensors III
Emery L. Moore; O. Glenn Ramer, Editor(s)

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