Abstract

We report a reflection-based phase-shifted long period fiber grating (PS-LPFG) and demonstrate its capability for simultaneous measurement of temperature and external reflective index (RI). The sensor device comprises a grating directly written by CO2 laser and silver-coated end face. A π-shifted LPFG is presented with two attenuation bands through its reflection spectrum. These two bands have different sensitivity towards temperature and external RI that can be used for simultaneous measurement of the two variables. The experimental results show that this probe-type PS-LPFG performs well in terms of linearity and sensitivity.

Department(s)

Electrical and Computer Engineering

Sponsor(s)

National Energy Technology Laboratory (U.S.)

Comments

This research work was supported by Department of Energy (DOE)-National Energy Technology Laboratory (NETL) under the contract DE-FE0001127

Keywords and Phrases

Attenuation bands; Long period fiber grating; Phase shifted; Reflection spectra; Reflective index; Sensor device; Simultaneous measurement; Two bands, Carbon dioxide; Phase shift; Sensors, Refractive index

International Standard Serial Number (ISSN)

0091-3286

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 2013 SPIE, All rights reserved.

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