Patent ID: 9574939
Date: 2017-02-21
CPC Classifications: G02B,G02F

Claim:
1. A fiber grating demodulation system for enhancing spectral resolution by finely adjusting a collimating mirror, the demodulation system comprising a laser pump source, a wavelength division multiplexer, a fiber Bragg grating, a diaphragm, a slit, a collimating mirror, a light splitting grating, an imaging focus mirror, and a linear array detector, wherein the laser pump source, the wavelength division multiplexer, and the fiber Bragg grating are connected in sequence, and the wavelength division multiplexer is further connected to the diaphragm; light emitted from the laser pump source is multiplexed by the wavelength division multiplexer and then enters the fiber Bragg grating, and a reflection spectrum of the fiber Bragg grating enters the slit of the fiber grating demodulation system as injected light, and after passing through the slit, the injected light is reflected by the collimating mirror, the light splitting grating, and the imaging focus mirror in sequence, and is finally converged to the linear array detector; and the collimating mirror is capable of rotating around its center line anticlockwise or clockwise by a certain of angle to change the incident direction of the light, so as to obtain a finer interference stripes at smaller intervals on the linear array detector.