Author Affiliations
Abstract
1 Laboratory of Micro-Nano Optoelectronic Materials and Devices, Key Laboratory of High-Power Laser Materials, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
2 Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
3 e-mail: yhang@siom.ac.cn
Residual infrared absorption is a key problem affecting the laser emission efficiency of Ti:sapphire crystal. In this paper, the origin of residual infrared absorption of Ti:sapphire crystal is systematically studied by using the first principles method. According to the contact conditions of O octahedron in the crystal structure of , four ion pair models and three ion pair models were defined and constructed. For what we believe is the first time, the near-infrared absorption spectra consistent with the experimental results were obtained in specific theoretical models. The electronic structures, absorption spectra, and charge distributions calculated show that the line-contact ion pair with antiferromagnetic coupling and the face-contact ion pair are two main contributors to the residual infrared absorption of Ti:sapphire, while some other ion pair models provide a basis to explain more complex residual infrared absorption.
Photonics Research
2021, 9(6): 06000909
1 中国科学院上海光学精密机械研究所, 强激光材料重点实验室, 上海 201800
2 暨南大学理工学院光电工程系, 广州 510000
3 中国科学院大学, 材料与光电研究中心, 北京 100049
4 中国科学院上海光学精密机械研究所, 强激光材料重点实验室, 上海 2018003
中红外激光晶体材料作为激光技术核心增益材料之一, 在**光电对抗、激光医疗、卫星遥感、环境监测、基础科学等领域具有非常重要的应用。本文介绍了近年来在中红外氟化物激光晶体材料中, 关于晶体生长、光学性能优化以及中红外激光性能等方面的研究工作, 特别是在中红外光学性能优化调控方面, 主要介绍基于稀土能级耦合的相互作用, 有效抑制发光离子的自终止效应, 以及为发光离子提供有效泵浦通道。
中红外氟化物激光晶体 晶体生长 光学性能优化 中红外激光性能 mid-infrared fluoride laser crystal crystal growth optical performance optimization mid-infrared laser performance
Author Affiliations
Abstract
1 State Key Laboratory of Crystal Materials and Institute of Crystal Materials, Shandong University, Jinan 250100, China
2 Key Laboratory of High Power Laser Materials, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
3 College of Physics and State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
Praseodymium-ion-doped gain materials have the superiority of lasing at various visible wavelengths directly. Simple and compact visible lasers are booming with the development of blue laser diodes in recent years. In this Letter, we demonstrate the watt-level red laser with a single blue laser diode and Pr:YLiF4 crystal. On this basis, the passively Q-switched pulse lasers are obtained with monolayer graphene and Co:ZnO thin film as the Q-switchers in the visible range.
140.3480 Lasers, diode-pumped 140.3540 Lasers, Q-switched 140.7300 Visible lasers Chinese Optics Letters
2019, 17(7): 071402
