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

A fiber grating and strain testing technology, applied in thermometers, thermometers with physical/chemical changes, measuring devices, etc., can solve the problems of inflexible selection of grating periods, low thermal stability of gratings, and lack of research data. Achieve the effect of easy operation, high resolution and high efficiency

CN108181023AInactive Publication Date: 2018-06-19BEIJING INFORMATION SCI & TECH UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2018-06-19
Estimated Expiration
Not applicable · inactive patent

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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.
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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...

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Embodiment Construction

[0048]The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0049] Embodiments of the present invention provide a fiber grating and thick tapered fiber temperature and strain testing system, such as Figure 1-8 As shown, a femtosecond laser 1 is included, the output end of the femtosecond laser 1 is connected to the input end of the optical gate 2, and the output end of the optical gate 2 is connected to the input end of the high-precision mobile platform 3, and the output of the high-precision mobile platf...