High-sensitivity temperature sensor based on an alcohol-filled photonic crystal fiber loop mirror

Abstract

A compact temperature sensor based on a fiber loop mirror (FLM) combined with an alcohol-filled high-birefringence photonic crystal fiber (PCF) is proposed and experimentally demonstrated. The output of the FLM is an interference spectrum with many resonant dips, of which the wavelengths are quite sensitive to the change of the refractive index of the filled alcohol for the interference of the FLM. Simulation analysis predicts a high temperature sensitivity, and experimental results show it reaches up to 6.6 nm/°C for the 6.1-cm-long PCF used in the FLM.

Alcohol sensing over O+E+S+C+L+U transmission band based on porous cored octagonal photonic crystal fiber

“…As an optical medium, photonic crystal has some identical properties [1][2][3][4][5][6][7][8][9][10][11]. The photonic crystal fibers are enormously used in the optical fiber technology due to its idiosyncratic properties.…”

“…Some identical properties are seen like as nonlinearity [1,2], high birefringence [3,4], high sensitivity [5,6], low confinement loss [7,8], improved effective area, and endlessly single mode [9][10][11]. For these reasons, PCF has drawn a great attraction among researchers.…”

Long-period gratings based on Photonics crystal fibers and applications

“…Fiber loop mirrors (FLMs) have been demonstrated for a number of applications, for example wavelength filters and sensors [14,15,50]. In a FLM, two interfering waves counter-propagate through the same fiber, and are exposed to the same environment.…”

“…Various kinds of sensors based on FLMs have been realized, such as temperature sensors, strain sensors, pressure sensors, liquid level sensors, biochemical sensors, UV detection, multi-parameter measurement and refractive index sensors. However, most HiBi-FLM sensors are based on monitoring the resonant wavelength variation of FLMs [15,51], an expensive OSA is needed.…”

Spectral Width Study in a Wavelength Detector

“…Los materiales semiconductores presentan una elevada no linealidad óptica resonante [2], que permite el diseño de una gran variedad de dispositivos fotónicos basados en ellos. Los láseres de semiconductor (LD), en sus diversas configuraciones de la cavidad resonante -FP [3], Vertical Cavity Surface Emitted Laser (VCSEL) [4], Distributed FeedBack (DFB) [5] y anillos [6]-y de medio activo -bulk, Quantum Well (QW), Multiple Quantum well (MQW) y Quantum Dot (QD) [7]-, es uno de los dispositivos optoelectrónicos con mayor número de aplicaciones gracias a su pequeño tamaño, a su capacidad de emitir en longitudes de onda dentro de los márgenes más empleados en diferentes campos de aplicación, así como su facilidad de fabricación y comercialización.…”