High-Sensitivity Temperature Sensor Based on a Selectively-Polymer-Filled Two-Core Photonic Crystal Fiber In-Line Interferometer

作者：Naeem Khurram; Kim Bok Hyeon; Kim Bongkyun; Chung Youngjoo^*

来源：IEEE Sensors Journal, 2015, 15(7): 3998-4003.

DOI：10.1109/JSEN.2015.2405911

• Two-core photonic crystal fiber
• interferometer
• optical fiber sensor
• high temperature sensitivity

A highly sensitive temperature sensor based on an all-fiber Mach-Zehnder interferometer using a selectively polymer-filled two-core photonic crystal fiber is experimentally demonstrated. The sensor fiber was made by the manual gluing and subsequent infiltration of polymer; the cladding air holes surrounding one core were selectively filled with a polymer material with a high thermo-optic (TO) coefficient while leaving those of the other core unfilled, and this led to the large TO mismatch between two cores. It was found from measurements that a very high temperature sensitivity of 1.595 nm/degrees C could be achieved, which was more than two orders of magnitude higher than that of the sensor fiber before the selective filling process.

• 出版日期2015-7