A fiber optic random laser high temperature sensor

Abstract

The invention discloses an optical fiber random laser high temperature sensor, which belongs to the technical field of optical fiber sensing. Including pump source, wavelength division multiplexer, gain fiber, random fiber grating, optical circulator, fiber isolator, tube fireplace and spectrometer, the two ends of the wavelength division multiplexer are respectively connected to the pump source and gain fiber, the gain fiber One end of the optical circulator is connected to the optical circulator, and the output end of the optical circulator is sequentially connected to a random fiber grating, a fiber isolator and a spectrometer, and the random fiber grating is placed in the tube fireplace; the pump light is coupled into the gain fiber through a wavelength division multiplexer for amplification, The optical circulator couples the amplified laser light into the random fiber grating; the temperature of the tube furnace is adjusted to change the wavelength of the random fiber grating, and the spectrometer records the spectrum of the output laser to sense the temperature. The sensor of the present invention can obtain extremely low threshold value, ultra-high optical signal-to-noise ratio and sense at relatively high temperature, and has great prospects in the aspects of high-temperature monitoring and measurement that are actually required.

Description

technical field [0001] The invention belongs to the technical field of optical fiber sensing, and more particularly, relates to an optical fiber random laser high temperature sensor. Background technique [0002] In recent years, with the continuous research on fiber random lasers, various applications have also matured accordingly. The research on random fiber gratings, the key devices in random fiber lasers, has also received extensive attention. Sensors based on fiber random lasers have also obtained The rapid development has greatly enriched the research and application fields of fiber random lasers. [0003] Fiber random laser has the advantages of simple structure, small size, light weight, anti-interference, corrosion resistance, high sensitivity, and it is also suitable for long-distance point or distributed measurement, easy to form a large-scale sensor network and a series of advantages. It has become a research hotspot at home and abroad, and has broad applicatio...

AI Technical Summary

Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a fiber optic random laser high temperature sensor, thereby solving the technical problem of high threshold value of the random laser high temperature sensor in the prior art

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