The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 05, 2019
Filed:
May. 25, 2017
Laser Institute of Shandong Academy of Science, Ji'ning, Shandong, CN;
Jian Guo, Ji'nan, CN;
Chang Wang, Ji'nan, CN;
Jiasheng Ni, Ji'nan, CN;
Gangding Peng, Ji'nan, CN;
Zhiqiang Song, Ji'nan, CN;
Haifeng Qi, Ji'nan, CN;
Weitao Wang, Ji'nan, CN;
LASER INSTITUTE OF SHANDONG ACADEMY OF SCIENCE, Ji'Ning, CN;
Abstract
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.