NDLI: Thermal compensation for a chirp fiber Bragg grating bonded substrate

Content Provider	IEEE Xplore Digital Library
Author	Chang, Y.M. Chih-Chun Cheng Yu-Lung Lo
Copyright Year	1999
Abstract	The chirp fiber bragg grating (CFBG) created using the substrate-straining technique requires an invariable center wavelength when subjected to a temperature change. To accomplish this task, a secondary substrate is attached to one side of the main substrate in a bimetallic beam configuration, used as a thermal compensator. However, when the temperature changes, the strain along the CFBG is not uniform because the main substrate is not prismatic. A systematic method based on the shape optimization technique was developed to determine the geometry of the second substrate for temperature compensation. The results show that the second substrate, determined using shape optimization, can produce the required strain distribution to compensate for the center wavelength shift in a CFBG due to temperature changes. Although the thermal compensation of a CFBG demonstrated here is simple, it should be emphasized that this methodology can be easily applied to determine the substrate profile for thermal compensation in other FBG-bonded substrates with nonuniform cross sections.
Sponsorship	IEEE Components, Packaging, and Manufacturing Technology Society IEEE Components, Packaging and Manufacturing Technology Society
Starting Page	188
Ending Page	193
Page Count	6
File Size	459204
File Format	PDF
ISSN	15213323
Volume Number	27
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-02-01
Publisher Place	U.S.A.
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Chirp Bonding Bragg gratings Fiber gratings Temperature Shape Capacitive sensors Thermal expansion Optimization methods Geometry
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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