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Method and system for controlling crystallization of sodium fluoride in PTR glass by using blue light and application thereof

A technology of sodium fluoride and sodium fluoride, which is applied in the field of sodium fluoride crystallization, can solve the problems of unstable refractive index modulation and affecting the performance of PTR glass, and achieve the effect of excellent performance and small grating period

Pending Publication Date: 2021-03-09
SUZHOU UNIV
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Problems solved by technology

However, the size and density of sodium fluoride crystals are affected by many factors, and these changes will cause the instability of the refractive index modulation, thus affecting the performance of PTR glass

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  • Method and system for controlling crystallization of sodium fluoride in PTR glass by using blue light and application thereof
  • Method and system for controlling crystallization of sodium fluoride in PTR glass by using blue light and application thereof
  • Method and system for controlling crystallization of sodium fluoride in PTR glass by using blue light and application thereof

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0037] As mentioned in the background technology, in the process of nucleation and crystallization of PTR glass, large silver bromide particles will be formed, and these large silver bromide particles ...

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Abstract

The invention discloses a method for controlling crystallization of sodium fluoride in PTR glass by using blue light. The method specifically comprises the following steps: while carrying out nucleation heat treatment on the PTR glass to form silver clusters, exposing the PTR glass by using the blue light to decompose sodium bromide particles with larger sizes and leave silver atom particles withsmaller sizes as nuclei for precipitation of sodium fluoride crystals; and therefore, the size of the precipitated sodium fluoride crystal is controlled. The invention also discloses an application ofthe method in preparation of the reflective volume Bragg grating. According to the method, the purpose of controlling the size of precipitated sodium fluoride can be achieved, so that the preparationof the reflective volume Bragg grating with a relatively short grating period is facilitated.

Description

technical field [0001] The invention relates to the field of advanced laser technology, in particular to a method, system and application for controlling the crystallization of sodium fluoride in PTR glass by using blue light. Background technique [0002] Photothermorefractive (PTR) glass is an optically transparent photosensitive multicomponent silicate glass that exhibits photothermally induced precipitation of crystalline phases. That is, silver nanoclusters will be produced under ultraviolet irradiation, and NaF nanocrystals will be generated when heated, which will cause permanent refractive index changes, which is the basis for the production of Bragg gratings. Such gratings are widely used in advanced optical applications such as stabilization of laser diodes or spectral beam combining. [0003] The nucleation and crystallization process of classic PTR glass is considered to be the following three steps: [0004] (i) Exposure to UV (Ag + +Ce 3+ +hv→Ag 0 +Ce 4+ ...

Claims

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Application Information

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IPC IPC(8): C01D3/02C01D3/24C03C23/00
CPCC01D3/02C01D3/24C03C23/0015
Inventor 张翔高帆葛子轶袁孝熊宝星
Owner SUZHOU UNIV
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