22 September 2014 Method to athermalize a long-period fiber grating for interrogation of fiber Bragg grating–based sensors
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Optical Engineering, 53(9), 096111 (2014). doi:10.1117/1.OE.53.9.096111
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.
© 2014 Society of Photo-Optical Instrumentation Engineers (SPIE)
Venkata Reddy Mamidi, Srimannarayana Kamineni, L. N. Sai Prasad Ravinuthala, Venkatapparao Thumu, Vengal Rao Pachava, "Method to athermalize a long-period fiber grating for interrogation of fiber Bragg grating–based sensors," Optical Engineering 53(9), 096111 (22 September 2014). http://dx.doi.org/10.1117/1.OE.53.9.096111
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KEYWORDS
Fiber Bragg gratings

Sensors

Temperature metrology

Signal attenuation

Temperature sensors

Modulation

Refractive index

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