Growth and performance of KDP crystals grown from different methods and seeds

Meng-fei QIN; Bo WANG; Xun SUN; Wen-yong CHENG

doi:10.3788/OPE.20192703.0511

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Growth and performance of KDP crystals grown from different methods and seeds

Modern Applied Optics | 更新时间：2020-08-13

- Growth and performance of KDP crystals grown from different methods and seeds
- Optics and Precision Engineering Vol. 27, Issue 3, Pages: 511-516(2019)
- 作者机构：
  
  山东大学晶体材料国家重点实验室，山东济南 250100
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20192703.0511
  CLC： O782.9
- Received：23 October 2018，
  
  Accepted：23 November 2018，
  
  Published：15 March 2019
- 稿件说明：
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Meng-fei QIN, Bo WANG, Xun SUN, et al. Growth and performance of KDP crystals grown from different methods and seeds[J]. Optics and precision engineering, 2019, 27(3): 511-516.
DOI：

Meng-fei QIN, Bo WANG, Xun SUN, et al. Growth and performance of KDP crystals grown from different methods and seeds[J]. Optics and precision engineering, 2019, 27(3): 511-516. DOI： 10.3788/OPE.20192703.0511.

摘要

磷酸二氢钾(KDP)晶体是一种经典的电光材料，是目前唯一可用于惯性约束核聚变的非线性光学材料。鉴于籽晶和生长方法对KDP晶体的生长和质量具有重要的影响，本文采用传统法生长法和点籽晶快速生长法生长KDP晶体，通过改变籽晶的种类及切向，不仅减少了晶体的恢复区，同时缩短了晶体的生长周期，生长出高透明度的单晶。对晶体的透过、结晶完整性及损伤等性能进行测试，结果表明，晶体在红外和可见光波段具有较高的透过率；晶体(001)面的衍射强度较强，峰形比较尖锐；相比于1-on-1方式，R-on-1处理使KDP的损伤阈值提高了1.7~2.1倍，晶体的抗损伤均匀性很高。生长的晶体具有优良的光学性能，籽晶对晶体的生长具有重要的影响。

Abstract

Potassium dihydrogen phosphate (KDP) crystal is a classic electro-optical material and is the only nolinear optical material used in the Inertial Confinement Fusion(ICF) program. The growth method and seed have a considerable effect on the quality of KDP crystal. In this study

KDP crystals were grown using both conventional and point-seed rapid-growth methods. By changing the directions of seeds

the regeneration sector was decreased and the length of the growth period was reduced. In addition

the grown crystals were made highly transparent and had no visible defect. Optical transmittance performance

crystalline perfection

and the laser damage threshold were measured. The results show that the crystals have high transmittance in the visible and infrared wavebands

and strong diffraction intensity in (001) face with a sharp peak; the damage thresholds of KDP crystals are improved by 1.7~2.1 with R -on-1 method as compared with 1-on-1 method. The grown crystals exhibit excellent optical performance

and the seeds have a considerable effect on the growth and quality of KDP crystal.

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Keywords

references

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