Scientists rapidly grow a long-seed DKDP crystal

Scientists rapidly grow a long-seed DKDP crystal
Large long-seed DKDP crystal with a long seed. Credit: SIOM

DKDP (KDxH2-xPO4), which can minimize stimulated Raman scattering, is the best nonlinear crystal used as a tripler in inertial confinement fusion (ICF) facilities.

It takes one to two years to get a DKDP tripler for ICF facilities using a traditional growth method. Therefore, the rapid growth method comes into being. However, in the 'point-seed' rapidly grown DKDP crystals, all prismatic faces and pyramidal faces grow under high supersaturated solutions, forming the so-called pyramid-prism (PY-PR) boundary which is detrimental to efficient frequency tripling and phase matching.

Recently, the researchers from Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences (CAS), has successfully grown a large long-seed DKDP crystal with the size of 470 mm × 495 mm × 560 mm.

With a long seed of 320 mm high, the DKDP crystal has been growing for just over three months. And this crystal can cut out DKDP triplers that do not contain PY-PR boundary.

The long-seed DKDP crystal not only has the advantage of traditional method that does not contain PY-PR boundary, but also has the advantage of "point seed" rapid growth method that has a high growth rate. At the same time, it can also improve the cutting efficiency of triplers.

This is the first large long-seed DKDP crystal obtained in the world, indicating that the rapid growth of long-seed DKDP crystal has been successfully verified. And this is a new scheme of DKDP crystal growth method provided for the construction of ICF facilities.

The long-seed DKDP crystal is grown from a self-developed device quipped with a Continuous Filtration System in SIOM. The related crystal growth method and the self-developed device have been patented.

Explore further

Development of a new low-cost gallium nitride (GaN) crystal manufacturing device

Citation: Scientists rapidly grow a long-seed DKDP crystal (2020, March 6) retrieved 15 June 2021 from
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.

Feedback to editors

User comments