A novel all-fiber micro-displacement sensor based on long period grating and tip structure

作者：BAI Zhi yong; ZHANG Wei gang; GAO She cheng; WANG Li; Key Laboratory of Optical Information Science; Technology Ministry of Education Institute of Modern Optics Nankai University

来源：Optoelectronics Letters, 2014, 10(03): 176-179.

DOI：10.1007/s11801-014-4038-2

• grating
• gating
• tracked
• cladding
• photonic
• photograph
• fitting
• interferometer
• immunity
• pitch

A novel high sensitivity all-fiber micro-displacement sensor is proposed and experimentally demonstrated.This sensor consists of a long period fiber gating and a fiber tip,which is achieved only by a commercial arc discharge fusion splicer,and thus possesses a lower cost.The wavelength sensitivity of the proposed sensor could be up to 934 pm/μm,which is four times higher than that of the long period fiber grating(LPFG) with an air cavity structure.The intensity change sensitivity is-1.973 dB/μm.

• 出版日期2014-5-1
• 单位南开大学