A reflective temperature-insensitive all-fiber polarization-mode interferometer and pressure sensing application based on PM-PCF

作者：Yin, Zhen; Gao, Rong; Geng, Youfu; Tan, Xiaoling; Li, Xuejin^*

来源：Optik, 2016, 127(20): 9206-9211.

DOI：10.1016/j.ijleo.2016.07.001

• Polarization-maintaining photonic crystal fiber (PM-PCF)
• Pressure sensor
• Birefringence

We experimentally demonstrate a novel reflective temperature-insensitive all-fiber pressure sensor based on polarization-maintaining photonic crystal fiber (PM-PCF). The sensing head is composed of a small segment of PM-PCF and a leading single-mode fiber (SMF). Two orthogonal polarized modes in the PM-PCF are excited by the splice point between SMF and the PM-PCF. After a round trip along the PM-PCF, a phase difference between two orthogonal polarization modes is induced due to the intrinsic high-birefringence of PM-PCF, and a Michelson-type reflective polarization-mode interferometer is enabled. The experimental results demonstrate that the wavelength-pressure coefficient of 4.15 nrn/MPa can be achieved, while the temperature coefficient is only 1.4 pm/degrees C. This type of pressure sensor offers salient advantages of high wavelength-pressure coefficient, low cross sensitivity to temperature, compact size, robust structure, and flexibility in application.

• 出版日期2016
• 单位香港中文大学（深圳）; 深圳信息职业技术学院; 深圳大学