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Proceedings Paper

Comparison of chirped FM/CW and chirped AM/CW fiber optic position sensors for aerospace applications
Author(s): Leon A. Newman
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Paper Abstract

During the past five years, fiber optic position sensing for aerospace applications based on high bandwidth chirped modulation of laser diode sources has been explored by a number of organizations. These investigations can be classified into two primary approaches: chirped Frequency Modulated/Carrier Wave (FM/CW) and chirped Amplitude Modulated/Carrier Wave (AM/CW). In this paper, the results of a system level analysis, which compares these two approaches in light of aerospace position sensing requirements, is presented. Key strengths and weaknesses of each approach are reviewed and conclusions are drawn concerning the applicability of each approach to aerospace position sensing. The primary conclusion is that the Doppler frequency shift imposed upon the optical carrier by the dynamic aerospace environment, is a major obstacle to the deployment of sensors based on the chirped FM/CW approach. While, in contrast, the performance of the chirped AM/CW approach is relatively insensitive to Doppler frequency shifts.

Paper Details

Date Published: 9 February 1993
PDF: 9 pages
Proc. SPIE 1799, Specialty Fiber Optic Systems for Mobile Platforms and Plastic Optical Fibers, (9 February 1993); doi: 10.1117/12.141342
Show Author Affiliations
Leon A. Newman, United Technologies Research Ctr. (United States)

Published in SPIE Proceedings Vol. 1799:
Specialty Fiber Optic Systems for Mobile Platforms and Plastic Optical Fibers
Luis Figueroa; Mototaka Kitazawa; Norris E. Lewis; Robert E. Steele; Deepak Varshneya, Editor(s)

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