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Optical Engineering

Method to athermalize a long-period fiber grating for interrogation of fiber Bragg grating–based sensors
Author(s): Venkata Reddy Mamidi; Srimannarayana Kamineni; L. N. Sai Prasad Ravinuthala; Venkatapparao Thumu; Vengal Rao Pachava
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Paper Abstract

A method is proposed to minimize the effect of temperature on a long-period fiber grating (LPG), enabling its effective use for the interrogation of wavelength-modulated fiber Bragg grating (FBG) sensors. The temperature dependence of LPG is compensated by means of creating the opposite effect from the temperature-induced strain, attributed by appropriately encapsulating in a specially designed Teflon tube. The encapsulated LPG has achieved six times stabilization over the bare LPG response for the temperature range of 20°C to 50°C. Application of the athermalized LPG for interrogation of an FBG-based temperature sensor is experimentally demonstrated.

Paper Details

Date Published: 22 September 2014
PDF: 5 pages
Opt. Eng. 53(9) 096111 doi: 10.1117/1.OE.53.9.096111
Published in: Optical Engineering Volume 53, Issue 9
Show Author Affiliations
Venkata Reddy Mamidi, National Institute of Technology, Warangal (India)
Srimannarayana Kamineni, National Institute of Technology, Warangal (India)
L. N. Sai Prasad Ravinuthala, National Institute of Technology, Warangal (India)
Venkatapparao Thumu, National Institute of Technology, Warangal (India)
Vengal Rao Pachava, National Institute of Technology, Warangal (India)

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