High Temperature Interferometric Fiber Sensor Based On Photonic Crystal Fiber

· Since the appearance of optic fiber sensor,it has been researched and popularized in more and more aspects as its obviously good quality,such as high temperature resistance,high sensitivity,compact structure and high resistance of electromagnetic.Nowadays,scientists have researched on particular fibers' features,like pohotonic crystal fiber(PCF),sapphire crystal optical fiber(SCF)and hollow-core fiber(HF).We mainly discuss the high temperature interferometric fiber optic sensor based on special optic fiber in this paper.The main research content and innovations are as follows:·(1)The basic principle and classification of fiber optic fiber have been scussed.We summarize the current research results of Fabry-Perot Interferometer FPI)high temperature fiber sensor,Fiber Bragg grating(FBG)high temperature fiber ensor and sapphire crystal optical high temperature fiber sensor.Besides,the article imply introduces the applications and development of fiber sensor.·(2)The article summarizes the basic features of pohotonic crystal fiber(PCF) apphire crystal optical fiber(SCF)and hollow-core fiber(HF)and introduces the elding properties of photonic crystal fiber and the high temperature radiation haracteristics of sapphire crystal optical fiber.·(3)Based on the principle of FPI,a two F-P cavity high temperature fiber ensor using PCF has been proposed,particularly for the environment of 1100 ?.The mperature sensitivity in the measurement is 9.94 pm/?when the temperature is ising and is 8.06 pm/?when the temperature is dropping,showing a good quality of epetition.This structure can be used for the measurement in high temperature.·(4)Based on the principle of MI,a new construction of MI high temperature iber sensor using PCF has been proposed.In the annealing treatment of low emperature,the temperature sensitivity is 15.98 pm/?,while in the high temperature,he temperature sensitivity drops to only 3.1 pm/?.As a result,this structure values urther research and and should be improved.(5)This article introduces a suspended-core microstructured Photonic Crystal iber(SC-PCF),by drawing the pohotonic crystal fiber.Then we propose a new fiber optic sensor structure based on the SC-PCF and we get the high temperature sensitivity of 5.43 pm/?.Obviously,this type of fiber sensor's quality should be improved.