Open AccessMulti-direction bending sensor based on supermodes of multicore PCF laser
Author(s) -
Jia Shi,
Fan Yang,
Dexian Yan,
Degang Xu,
Chenghao Guo,
Hua Bai,
Wei Xu,
Wu Yu,
Jinjun Bai,
Shanshan Zhang,
Tiegen Liu,
Jianquan Yao
Publication year - 2019
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.023585
Subject(s) - optics , materials science , photonic crystal fiber , laser , bend radius , bending , optical fiber , fiber optic sensor , fiber laser , crosstalk , optoelectronics , wavelength , physics , composite material
A multi-direction bending sensor based on the 18-core photonic crystal fiber (PCF) is demonstrated in this paper. The design of the sensor is discussed theoretically and experimentally. The PCF serves as the laser gain medium and the sensing medium simultaneously in the fiber laser sensor. The operating wavelength of the proposed PCF laser sensor is about 1032.32 nm. A CMOS image capture system is used to acquire the distribution of supermodes in the PCF laser. Based on the normalized intensity distribution of supermodes, six directions can be measured. The sensor also shows the ability to measure bending radius within 0.11 m. Then, the thermal effects of the bending sensor have been analyzed and the sensing system shows a low temperature crosstalk.