Sensitivity-enhanced high-temperature sensing using all-solid photonic bandgap fiber modal interference.
- 26 January 2011
- journal article
- Published by Optica Publishing Group in Applied Optics
- Vol. 50 (4), 468-472
- https://doi.org/10.1364/ao.50.000468
Abstract
A wavelength-encoded interferometric high-temperature sensor based on an all-solid photonic bandgap fiber (AS-PBF) is reported. It consists of a small piece of AS-PBF spliced core offset with standard single-mode fibers. Two core modes and are conveniently utilized as optical arms to form Mach– Zehnder-type interference at both the first and the second photonic bandgaps, and the maximum extinction ratio exceeds . Experimental and theoretical investigation of its response to temperature confirms that high temperatures up to can be effectively sensed using such an AS-PBF interferometer, and benefiting from a large effective thermo-optic coefficient of fiber structure, the sensitivity can be significantly enhanced ( at ).
Keywords
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