Fiber grating and thick and tapered fiber temperature and strain test system and method thereof

Abstract

A fiber grating and thick and tapered fiber temperature and strain test system disclosed by the present invention comprises a femtosecond laser, the output end of the femtosecond laser is connected with the input end of an optical gate, and the output end of the optical gate is connected with the input end of a high-precision mobile platform. The output end of the high-precision mobile platform isconnected with the input end of a spectrograph, and the input end of the high-precision mobile platform is connected with the output end of a broadband light source. According to the fiber grating and thick and tapered fiber temperature and strain test system and the method thereof, a femtosecond laser processing technology has the technical characteristics of being high in processing precision and efficiency and being simple and convenient to operate in a conventional laser processing technology, also displays the unique advantages in the processing of high precision, high resolution and lowdamage of the fiber micro-nano materials with ultra short pulse width of the femtosecond magnitude and the ultra strong peak power of the thousand trillion watt magnitude. The method does not need aphotosensitive fiber, the grating cycle can be selected flexibly, and an etched grating has the very high thermostability.

Description

technical field [0001] The invention relates to the technical field of optical fiber temperature and strain testing, in particular to an optical fiber grating and thick taper optical fiber temperature and strain testing system and method thereof. Background technique [0002] The research and application of fiber gratings in the fields of fiber lasers and fiber optic sensors is very important. Fiber gratings with a grating period of tens to hundreds of microns are called long-period fiber gratings, which are characterized by the core fundamental mode and cladding that transmit in the same direction Coupling between modes, basically no back-reflected light, belongs to the transmission-type band-stop filter. Compared with fiber Bragg gratings, the resonance wavelength and resonance intensity of long-period fiber gratings are very sensitive to changes in the external environment, and have a larger temperature sensitivity coefficient. As a temperature sensor, they can measure hi...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention provides a fiber grating and thick taper fiber temperature and strain testing system and its method, which solves the problem that the current fiber grating has high efficiency in many fields and does not have traditional laser processing. The technical characteristics of processing precision, easy operation, and high efficiency in the technology require the use of photosensitive optical fibers. The grating period cannot be flexibly selected, and the thermal stability of the written grating is relatively low. Research in modern industrial processing The problem of even more missing data

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