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

Authors : Mustafa BİLSEL, İsa NAVRUZ

Pages : 164-176

Doi:10.33769/aupse.745801

View : 15 | Download : 9

Publication Date : 2020-12-31

Article Type : Research Paper

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 insert ignore into journalissuearticles values(DTF); and the other is an up-tapered fiber insert ignore into journalissuearticles values(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