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Grating fabricating equipment and process

A technology for manufacturing a device and a grating, which is applied to the manufacturing device of the grating and the manufacturing field of the grating, can solve the problems of the limitation of the grating and the difficulty of practical application, and achieve the effect of reducing the manufacturing cost.

Inactive Publication Date: 2002-09-25
李恩林
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods all use templates. To produce high-quality and repeatable fiber Bragg gratings, high-precision displacement or angle control is required, which is difficult in practical applications.
And the length of the grating that can be written is limited by the length of the template

Method used

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  • Grating fabricating equipment and process
  • Grating fabricating equipment and process
  • Grating fabricating equipment and process

Examples

Experimental program
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Embodiment Construction

[0033] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0034] attached figure 1 Among them, a continuous laser beam 101 is split into beams 106 and 107 after passing through a half-mirror 102 . The light intensity of the light beam 106 and the light beam 107 are equal or nearly equal. The beam 106 and the beam 107 are respectively reflected by the total reflection mirrors 105 and 103 to obtain a parallel beam 109 and a beam 110 . The mirrors 102, 103, 104, 105 can be replaced by prisms or other forms of optical elements to complete the beam splitting function. Light beam 109 and light beam 110 pass through optical frequency shifters 111 and 112, respectively. In the embodiment of the present invention presented here, optical frequency shifters 111 and 112 are acousto-optic frequency modulators, but they may also be electro-optic or other forms of optical frequency modulators.

[0035] attached image ...

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Abstract

The present invention relates to the equipment and process for fabricating low-cost precise grating, especially of diffraction grating and various waveguide grating including fiber Bragg grating, andcan generate continuous grating structure and write required fringes directly to fiber or planar waveguide to form Bragg grating, and may be used in fabricating various gratings. Technologically, thepresent invention includes separate frequency shift of two laser beams with equal or near strength, convergence of the laser beams to generate interference fringes, and graving photosensitive medium with the interference fringes while shifting the interference fringers. The present invention can solve the problems of chirp, toe cutting, phase shift and long grating write in grating fabrication.

Description

technical field [0001] The invention relates to a grating manufacturing method and its device, in particular to a diffraction grating and various waveguide gratings including Fiber Bragg Grating (FBG for short) and its device. Background technique [0002] A grating is a commonly used optical component. Traditional gratings are composed of many repeated grating structures with a certain pitch. These repeated grating structures modulate the amplitude and phase (or both) of the incident light, so that the incident light is diffracted after passing through the grating to form diffracted light at various levels. Traditional diffraction gratings are the key components of various spectrum analyzers. The earliest diffraction gratings were made by mechanical scribing, and most of the current gratings are made by holographic interference exposure, chemical etching and electron beam scribing. [0003] A fiber Bragg grating can be formed by writing a gratin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/18G02B6/124
Inventor 李恩邦李恩林
Owner 李恩林
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