Share Email Print
cover

Proceedings Paper

Analysis of accuracy error and distortion in an operationally passive interferometric demodulation technique
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

Many architectures of fiber Bragg grating (FBG) interrogation systems used for mechanical motion (strain, acceleration, etc.) detection utilize interferometry for some part of the demodulation process. Using a hybrid Mach-Zehnder/tunable filter/3-by-3 coupler system architecture as a testbed, this paper examines error sources in the demodulation process giving rise to both/either accuracy and/or resolution degradation in the demodulated output. In particular, realizations of degradation metrics such as noise rise and harmonic distortion are reported due to inaccuracy in demodulation parameters, such as coupler parameters or photodetector voltages. Error models are developed where appropriate for comparison between prediction and measurement.

Paper Details

Date Published: 30 March 2006
PDF: 12 pages
Proc. SPIE 6167, Smart Structures and Materials 2006: Smart Sensor Monitoring Systems and Applications, 61671E (30 March 2006); doi: 10.1117/12.657146
Show Author Affiliations
M. D. Todd, Univ. of California, San Diego (United States)
Mark E. Seaver, U.S. Naval Research Lab. (United States)
Jonathan M. Nichols, Naval Research Lab. (United States)
Stephen T. Trickey, Naval Research Lab. (United States)


Published in SPIE Proceedings Vol. 6167:
Smart Structures and Materials 2006: Smart Sensor Monitoring Systems and Applications
Daniele Inaudi; Wolfgang Ecke; Brian Culshaw; Kara J. Peters; Eric Udd, Editor(s)

© SPIE. Terms of Use
Back to Top