Birefringent Bragg Grating in C-Shaped Optical Fiber as a Temperature-Insensitive Refractometer

Sensors

Morten Ibsen¹  SeongWoo Yoo²  SweeChuan Tjin²  RexXiao Tan²  Daryl Ho²  ChunHo Tse²  YungChuen Tan³ 

[1] Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ, UK;School of Electrical and Electronics Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore;Temasek Laboratories@NTU, 50 Nanyang Avenue, Research Techno Plaza, Singapore 637553, Singapore;

关键词: fiber sensors;    fiber Bragg gratings;    specialty fibers;    refractometers;   

DOI  :  10.3390/s18103285

来源: DOAJ

【 摘 要 】

We demonstrate a simple-to-fabricate refractometer based on the inscription of fiber Bragg gratings in a special C-shaped optical fiber. The C-shaped fiber was drawn into shape using a quarter cladding removed preform of a commercial standard single-mode fiber by simple machining. The sensor did not suffer from cross-sensitivity of the refractive index with ambient temperature fluctuations, commonly occurring with many optical fiber refractometers. A refractive index sensitivity of 1300 pm per refractive index unit (RIU) was achieved without employing any additional sensitization techniques such as tapering or etching.

【 授权许可】

Unknown