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Method for increasing laser-damaged threshold through ion beam elastic domain etching

A laser damage threshold, ion beam technology, applied in the direction of cleaning methods using tools, cleaning methods using liquids, chemical instruments and methods, etc., to avoid surface scratches and improve the ability to resist laser damage.

Inactive Publication Date: 2016-01-20
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

This series of problems has caused great difficulties in the cleaning of KDP crystals. The difficulty to solve this problem is: how to realize the cleaning of KDP crystals without scratches on the surface and without damaging the high-precision and high-quality surfaces. Surface cleaning to remove possible sub-surface defects on the crystal surface to effectively increase the laser damage threshold of the crystal

Method used

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  • Method for increasing laser-damaged threshold through ion beam elastic domain etching
  • Method for increasing laser-damaged threshold through ion beam elastic domain etching
  • Method for increasing laser-damaged threshold through ion beam elastic domain etching

Examples

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example example 1

[0030] The non-water-based magnetorheology is used to polish the KDP crystal, and the polished crystal surface is etched and polished by ion beam elastic domain. The specific polishing process is as follows:

[0031] Step 1: Polishing the KDP crystal on the magnetorheological machine tool; magnetorheological polishing of the KDP crystal is already a very mature technology in the field, and will not be repeated here.

[0032] Step 2, remove the polished KDP crystal and quickly put it into a dry air shower with dry air;

[0033] Step 3, drop a small amount of xylene on the KDP crystal with a dropper, and soak the entire surface in xylene. After about 10 seconds, use the lens cleaning paper to lightly brush the surface of the crystal. Note that the lens cleaning paper cannot be reused. The surface of the lens cleaning paper is stained with iron powder, and it is easy to scratch the crystal surface after repeated use; the concentration of xylene is above 99.3%.

[0034] Step 4, p...

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Abstract

The invention provides a method for increasing a laser-damaged threshold through ion beam elastic domain etching. Polishing of potassium dihydrogen phosphate (KDP) crystals is carried out through non-water-based magnetorheology, and ion beam elastic domain etching polishing is carried out on the surfaces of the polished crystals. By means of the method, it can be guaranteed that residual organic alcohol and iron powder on the surfaces of the crystals are removed, it can be ensured that scratches on the surfaces are avoided and the surface quality is not damaged in the iron powder removing process, meanwhile, subsurface defects which are generated in the ultraprecise turning process and not completely removed through magnetorheology polishing are overcome through elastic domain etching, and therefore the laser damage resistance capacity of the KDP crystals is effectively improved.

Description

technical field [0001] The invention relates to improving the laser damage threshold of a KDP crystal after optical parts are polished, in particular to an ion beam elastic domain etching and polishing process on the surface of a KDP crystal. technical background [0002] KDP crystal is a typical soft and brittle functional crystal material with excellent nonlinear optical properties. In the 1950s, KDP, as a piezoelectric crystal material with excellent performance, was mainly used in the manufacture of sonar and civilian piezoelectric transducers . At the same time, KDP crystal is an electro-optic crystal material with excellent performance. With the emergence of laser technology in the 1960s, the crystal has shown its application prospects in major technologies such as high-power laser system controlled thermonuclear reaction and nuclear explosion simulation. Crystals are currently the only nonlinear optical materials that can be used in laser fusion engineering. However...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24B13/00B08B3/08B08B1/00
CPCB08B3/08B24B13/00B08B1/143
Inventor 戴一帆陈少山胡皓石峰解旭辉彭小强周林
Owner NAT UNIV OF DEFENSE TECH
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