A CONCATENATED UP AND DOWN TAPERED FIBER FOR SIMULTANEOUS MEASUREMENT OF STRAIN AND TEMPERATURE

Year 2020, , 164 - 176, 31.12.2020

Mustafa Bilsel , İsa Navruz

https://doi.org/10.33769/aupse.745801

Cited By: 1

Abstract

A novel fiber optical sensor based on in-line fiber Mach-Zehnder interferometer for simultaneous measurement of strain and temperature is proposed and demonstrated experimentally. The interferometer is simple, extremely robust and highly sensitive and consists of two concatenated parts; one is a down-tapered fiber (DTF) and the other is an up-tapered fiber (UTF). UTF and DTF sections of the sensor are fabricated by using a commercial fiber splicer and a non-commercial setup based on heating and stretching a portion of a standard single-mode fiber, respectively. While UTF section behaves as a beam splitter to decompose the injected light into core and cladding modes, DTF section provides evanescent field to access the surrounding environment. Experimental results indicate that the resolutions of 0.83 °C and 45.80 micro-epsilon were achieved in temperature and strain, respectively, for simultaneous measurement with a 10 pm of wavelength resolution.

Keywords

up-tapered fiber, down-tapered fibers, simultaneous measurement, strain

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