Open AccessRemarkable temperature-dependent second-harmonic-generation performance of a YCOB crystal
Author(s) -
Chuanrui Zhao,
Xinle Wang,
Zhengping Wang,
Yuxiang Sun,
Shiwei Tian,
Hongkai Ren,
Fapeng Yu,
Xian Zhao,
Xinguang Xu
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.410606
Subject(s) - second harmonic generation , materials science , optics , crystal (programming language) , atmospheric temperature range , laser , nonlinear optics , physics , thermodynamics , computer science , programming language
For the first time, the temperature stability of second-harmonic-generation (SHG) is reported for the entire space of a YCa 4 O(BO 3 ) 3 (YCOB) crystal for a temperature range of -10 - 520 °C. Both theoretical calculations and experimental data indicate an optimum phase-matching (PM) direction of (θ = 149.2°, ϕ = 0°), which is located in the XZ principle plane (90° < θ < 180°). A special regression phenomenon of the PM angle was found in this direction, which further increased the SHG output at high temperature (> 200 °C). As a result, for SHG of the Nd:YAG laser, the measured temperature bandwidth of a YCOB crystal cut along the optimum PM direction is larger than 490 °C·cm. As demonstrated in this study, among all nonlinear optical crystals, this cut-type is currently the best choice when temperature-insensitive SHG is required.