Development of Photonic Crystal Fiber Based Gas/ Chemical Sensors

摘要

The development of highly-sensitive and miniaturized sensors that capable ofreal-time analytes detection is highly desirable. Nowadays, toxic or colorlessgas detection, air pollution monitoring, harmful chemical, pressure, strain,humidity, and temperature sensors based on photonic crystal fiber (PCF) areincreasing rapidly due to its compact structure, fast response and efficientlight controlling capabilities. The propagating light through the PCF can becontrolled by varying the structural parameters and core-cladding materials, asa result, evanescent field can be enhanced significantly which is the maincomponent of the PCF based gas/chemical sensors. The aim of this chapter is to(1) describe the principle operation of PCF based gas/ chemical sensors, (2)discuss the important PCF properties for optical sensors, (3) extensivelydiscuss the different types of microstructured optical fiber based gas/chemical sensors, (4) study the effects of different core-cladding shapes, andfiber background materials on sensing performance, and (5) highlight the mainchallenges of PCF based gas/ chemical sensors and possible solutions.