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Preparation method of volume Bragg grating

A volume Bragg grating, refractive index distribution technology, applied in grating fibers, light guides, optics, etc., can solve the problems of high difficulty and high cost, and achieve the effect of low manufacturing cost, lower production cost, and increase the range of refractive index modulation.

Active Publication Date: 2019-09-24
苏州东辉光学有限公司
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method for preparing volume Bragg gratings to solve the problem of introducing NaF grains in the traditional VBG preparation; and to solve the high cost and difficulty of the traditional VBG preparation. big problem

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  • Preparation method of volume Bragg grating
  • Preparation method of volume Bragg grating
  • Preparation method of volume Bragg grating

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Embodiment Construction

[0056] Now in conjunction with the accompanying drawings, the preferred embodiments of the present invention will be described in detail.

[0057] Such as figure 1 with figure 2 As shown, a preferred embodiment of a method for preparing a volume Bragg grating is provided.

[0058] A method for preparing a volume Bragg grating, comprising the steps of:

[0059] Step S11, ion-exchanging a plurality of base glasses of equal thickness to form a radial gradient refractive index distribution from the center to the edge inside each base glass;

[0060] Step S12, stacking the ion-exchanged base glass and performing a stretching operation to form a thin sheet;

[0061] Step S13, repeatedly performing the cutting operation, stacking operation, and stretching operation on the sheet;

[0062] Step S15 , forming a volume Bragg grating structure with a period of μm or nm.

[0063] Specifically, refer to figure 2 , stacking ion-exchanged basic glass to form a stacked basic glass struct...

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Abstract

The invention relates to the field of volume Bragg gratings, in particular to a preparation method of a volume Bragg grating. The method comprises the following steps: carrying out ion exchange of a plurality of pieces of base glass with equal thickness, and forming radial gradient refractive index distribution from the center to the edge in each piece of base glass; stacking the base glass subjected to ion exchange, and carrying out stretching operation to form a sheet; repeatedly carrying out cutting operation, stacking operation and stretching operation on the sheet; and forming a volume Bragg grating structure with a period of [mu]m level or nm level. According to the invention, the method can achieve the higher / lower refractive index modulation degree flexibly and freely, can achieve the preparation of the large-area, small-thickness and high-efficiency volume Bragg grating, is not high in manufacturing cost, facilitates the large-scale and high-efficiency preparation of the volume Bragg grating structure, and is suitable for the commercial production.

Description

technical field [0001] The invention relates to the field of volume Bragg gratings, in particular to a preparation method of volume Bragg gratings. Background technique [0002] As a filter element, volume Bragg grating (VBG) is selective to the wavelength of incident light that satisfies the Bragg condition, and can improve the emission spectrum of the laser. It is widely used in the mode selection and wavelength stabilization of semiconductor lasers, high-power laser beam combining, and laser space. Filtering, wavelength selection of continuously tunable lasers, notch filters of Raman spectrometers, etc. The traditional VBG preparation method is to record VBG in holographic recording photosensitive glass material [L.B.Glebov, N.V.Nikonorov, E.I.Panysheva, et al, "Polychromic glasses-a new material for recording volμmephase holograms", Sov.Phys.Dokl, 35: 878(1990)], with SiO2-Na2O-Al2O3-ZnO as the main component, doped with Ag, Ce, fluoride, and bromide, and prepared thous...

Claims

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Application Information

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IPC IPC(8): G02B6/02
CPCG02B6/0208G02B6/02123G02B6/02152
Inventor 邹快盛
Owner 苏州东辉光学有限公司
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