A device and method for on-line preparation of a weak grating array with continuous wavelength variation

A wavelength-changing, weak grating technology, applied in measuring devices, optical waveguide light guides, optics, etc., can solve the problems of small wavelength types and difficulty in completely eliminating grating crosstalk, so as to reduce shadow effects, improve sensing distance and multiplexing capacity , Improve the effect of multiplexing capacity
CN111208602BActive Publication Date: 2021-03-23WUHAN UNIV OF TECH +1
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
WUHAN UNIV OF TECH
Publication Date
2021-03-23

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Abstract

The invention discloses a device and a method for preparing a weak grating array with continuous wavelength change online. The device mainly comprises an optical fiber drawing tower system and an online grating inscribing system, wherein a phase mask plate is mounted on one platform, accurate and rapid regulation and control of the central wavelength of an inscribing grating are achieved, a rotating platform is controlled by a central control system, a rotating angle of the phase mask plate is changed in real time according tochange of the central wavelength of the inscribing grating. According to the method for preparing the weak grating array with the continuous wavelength change online, the grating is inscribed online based on a phase mask method, and the grating array with the same orcontrollable reflectivity and the center wavelength capable of continuously changing is prepared by rotating the angle of the phase mask plate and enhancing and compensating corresponding laser pulseenergy. The device is advantaged in that the weak grating array with continuous wavelength change can be prepared, the shadow effect and crosstalk influence between the identical gratings can be effectively eliminated, and use requirements of a high-capacity dense optical fiber sensing network are further met.
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Description

technical field

[0001] The invention belongs to the technical field of optical fiber grating preparation, and in particular relates to an on-line preparation device and method for a weak grating array with continuous wavelength variation. Background technique

[0002] With the continuous development of the Internet of Things, higher requirements are put forward for the sensor network mainly based on optical fiber sensors. At present, the optical fiber sensor network is continuously developing in the direction of precision, density and scale. The further development of a new type of high-capacity dense fiber sensor network has become a major issue in the new wave of informationization.

[0003] The performance requirements for the new-generation optical fiber sensor network mainly include the following two aspects: First, the sensing capacity should be large, including a large number of measurement points and a wide range of measurement. For example, a large-scale oil pipelin...

Claims

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