Non-critical phase-matching conditions for fourth harmonic generation of DKDP crystal

Shaohua Ji,Shaojun Zhang,Zhengping Wang,Mingxia Xu,Baoan Liu,Lisong Zhang,Xun Sun,Lili Zhu,Xinguang Xu

doi:10.1364/ome.2.000735

Abstract

The non-critical phase matching (PM) conditions of deuterated dihydrogen phosphate (DKDP) crystal are investigated in this paper for fourth harmonic generation (FHG) of Nd:YAG crystal and Nd:glass lasers, which include exterior angle deviation, deuterium content and PM temperature. DKDP crystals of different deuterium content were grown from aqueous solutions and cut for type-I non-critical phase-matching with the direction at 90° to the crystal Z axis (θ = 90°) and at 45° to the crystal X axis (Ф = 45°). The samples are measured for FHG at 1064 nm and 1053 nm, respectively. The deuterium content of DKDP crystal that supports non-critical phase-matching for FHG experiments is confirmed by measuring the relationship of deuterium content and phase-matching angle. Additionally, the non-critical phase matching temperature is also examined.

Highlights

KDP/DKDP crystals are indispensable nonlinear optical materials that perform laser frequency conversion in inertial confinement fusion (ICF) project, owning to their excellent properties including high transmittance from infrared to ultraviolet regions, moderate#163647 - $15.00 USD Received 24 Feb 2012; revised Apr 2012; accepted Apr 2012; published 30 Apr 2012 (C) 2012 OSAIn this paper, we studied the non-critical phased-matching (NCPM) fourth harmonic generation (FHG) conditions of DKDP crystal for the first time by using Nd:YAG laser (1064 nm) and Nd:glass laser (1053 nm) as the fundamental waves, which include phase matching (PM) angle vs. deuterium content, and PM angle vs. temperature
When the fundamental wavelength is 1053 nm, the DKDP crystals with high deuterium content (86%, 90%, 97%) cannot achieve NCPM
We investigated type-I NCPM FHG conditions for DKDP crystal, including deuterium content and crystal temperature

Summary

Introduction

KDP/DKDP crystals are indispensable nonlinear optical materials that perform laser frequency conversion in inertial confinement fusion (ICF) project, owning to their excellent properties including high transmittance from infrared to ultraviolet regions, moderate. We studied the NCPM FHG conditions of DKDP crystal for the first time by using Nd:YAG laser (1064 nm) and Nd:glass laser (1053 nm) as the fundamental waves, which include PM angle vs deuterium content, and PM angle vs temperature. We hope that this present work can provide more references for FHG application of DKDP crystal

Crystal growth

Preparation of samples

Results and discussion

Conclusion