Renaissance IP Law Group, LLP
Temperature sensor and temperature sensing system based on active phase-shifted fibre grating
Provided are a temperature sensor and an active phase-shifted grating-based temperature sensing system, relating to a fiber sensing technical field. The temperature sensor comprises a pump laser, a wavelength division multiplexer, an optical detector and an active phase-shifted fiber grating with π phase shift. Pump light emitted by the pump laser enters the active phase-shifted fiber grating through the wavelength division multiplexer. The active phase-shifted fiber grating absorbs the pump light and emits laser light, which travels back through the wavelength division multiplexer and enters the optical detector. The optical detector measures output power of the active phase-shifted fiber grating, to analyze the power to obtain ambient temperature of the active phase-shifted fiber grating. Compared with wavelength demodulation based fiber grating sensors, this temperature sensor can obtain ambient temperature of the active phase-shifted fiber grating solely by analyzing output power of the active phase-shifted fiber grating measured by the optical detector.
LASER INSTITUTE OF SHANDONG ACADEMY OF SCIENCE
G
G01K
inventional
Zhiqiang Weitao Jiasheng Chang Gangding Jian Haifeng
Song Wang Ni Wang Peng Guo Qi