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Long period optical fibre grating ultraviolet laser point-to-point writing method

A fiber grating and ultraviolet laser technology, applied in the direction of cladding fiber, optical waveguide light guide, etc., can solve the problems of high cost, fixed grating wavelength, difficult to adapt to research, design and experiment, etc., and achieve the effect of saving production cost.

Inactive Publication Date: 2008-09-17
SHANDONG UNIV
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Problems solved by technology

No matter what kind of template, the general cost is relatively expensive, and the wavelength of the grating is relatively fixed, so it is difficult to meet the needs of research, design and experiment

Method used

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  • Long period optical fibre grating ultraviolet laser point-to-point writing method
  • Long period optical fibre grating ultraviolet laser point-to-point writing method

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Experimental program
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Embodiment

[0022] The embodiment device of the present invention such as figure 1 As shown, the model of laser 1 is Innova 300C Motofred (Coherent Company); the model of acousto-optic modulator 3 is M110-4UV(BR)-AT4 (GOOCH&HOUSEGO).

[0023] The ultraviolet laser point-by-point writing method of long-period fiber gratings, the steps are as follows:

[0024] I. Making optical path adjustment: the laser beam sent by laser 1 passes through AOM 3 and is reflected by plane mirror 4 again, and is vertically incident on the first cylindrical mirror 5 and the second cylindrical mirror 6 successively; the first cylindrical mirror 5 and the second cylindrical mirror Cylindrical mirrors 6 are placed orthogonally to each other, so that the laser beams form an energy-concentrated spot after being focused;

[0025] II. Determination of the position of the optical fiber: First clamp a test optical fiber in the V-shaped grooves of the optical fiber clamps 11 at both ends of the precision electronically...

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Abstract

The invention provides a method for producing a long period optical fiber raster using a argon ion frequency double laser and an acousto-optic adjuster and two orthogonal cylindrical lens. The switch duty ratio of the acousto-optic adjuster and the travelling speed of the precise electronic control mobile platform are set by the computer and the photosensitive optical fiber on the mobile platform is exposed point by point to produce the long period optical fiber raster. The producing method can save the cost with strong tunability and important practical application cost, compared with the conventional ultraviolet light writing method.

Description

(1) Technical field [0001] The invention belongs to the technical fields of optical fiber communication and optical fiber sensing, and in particular relates to an ultraviolet laser point-by-point writing method of a long-period optical fiber grating. (2) Background technology [0002] Long period fiber grating (LPFG for short) is a new type of in-core fiber grating device developed in recent years. It has the advantages of small additional loss, no back reflection, no electromagnetic interference, and full compatibility with optical fibers. It is a very good transmission-type band-stop filter, which has been widely used in optical fiber communication and optical fiber sensing. At present, it is mainly used to make devices such as gain equalizers, filters, wavelength selective couplers, optical add-drop multiplexers and optical switches, and to measure single parameters such as temperature, strain, and distortion. At the same time, it is used in multi-parameter measurements, ...

Claims

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Application Information

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IPC IPC(8): G02B6/02
Inventor 冯德军高霞姜明顺隋青美
Owner SHANDONG UNIV
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