Abstract

A novel cladding-mode-resonance-based polarization-maintaining photonic-crystal-fiber Sagnac interferometer (PMPCF-SI) and its application for fiber sensor are demonstrated. By introducing a mode field diameter mismatch at a splicing joint of an inbuilt single-mode fiber (SMF)-PMPCF-SMF structure connected in an SI, an intermodal interference is constructed by the excited cladding modes and the polarization modes of the PMPCF. With such a PMPCF-SI, simultaneous strain and temperature measurements are demonstrated. The SI behaves as a sensor and a filter simultaneously. By measuring the wavelength variation and transmissivity difference between two almost symmetrical resonance peaks in the spectral response of the SI, simultaneous strain and temperature measurements are achieved.

© 2011 IEEE

Low-splicing-loss polarization-maintaining photonic-crystal-fiber-based Sagnac interferometer and its cladding-mode effect

Bo Dong, Jianzhong Hao, Zhaowen Xu, Chin-Yi Liaw, Yu Song Meng, and Zhaohui Cai
Appl. Opt. 49(14) 2630-2634 (2010)

Pressure sensor realized with polarization-maintaining photonic crystal fiber-based Sagnac interferometer

H. Y. Fu, H. Y. Tam, Li-Yang Shao, Xinyong Dong, P. K. A. Wai, C. Lu, and Sunil K. Khijwania
Appl. Opt. 47(15) 2835-2839 (2008)

Highly sensitive torsion sensor with femtosecond laser-induced low birefringence single-mode fiber based Sagnac interferometer

Bo Huang and Xuewen Shu
Opt. Express 26(4) 4563-4571 (2018)

Multiplexing of polarization-maintaining photonic crystal fiber based Sagnac interferometric sensors

H. Y. Fu, A. C. L. Wong, P. A. Childs, H. Y. Tam, Y. B. Liao, C. Lu, and P. K. A. Wai
Opt. Express 17(21) 18501-18512 (2009)

Sagnac loop interferometer based on polarization maintaining photonic crystal fiber with reduced temperature sensitivity

Do-Hyun Kim and Jin U. Kang
Opt. Express 12(19) 4490-4495 (2004)