人工晶体学报, 2020, 49 (8): 1361, 网络出版: 2020-11-11
掺Er3+晶体近3 μm中红外激光研究进展
Research Progress of Near 3 μm Mid-infrared Laser Based on Er3+ Doped Single Crystals
近3 μm激光 掺Er3+晶体 高功率激光 热效应 自终止 合作上转换 near 3 μm laser Er3+ doped single crystal high power laser thermal effect self-termination cooperative up-conversion
摘要
Er3+近3 μm激光是高精度激光手术的理想光源, 此外其本身可作为中远红外激光系统的泵浦源, 对长波激光的发展具有重要价值。研究表明, Er离子间的合作上转换能够抑制激光下能级寿命过长引起的粒子阻塞, 显著提高激光效率。据此提出的“高浓度掺杂”方案造成了增益晶体严重的热效应, 限制了激光功率提升。本文简要总结了关于掺Er3+晶体激光自终止和合作上转换的研究成果, 介绍了目前实现高功率近3 μm激光的实验方案及其研究进展, 对高功率Er3+近3 μm激光的发展进行了展望。
Abstract
The Er3+ based near 3 μm laser is an ideal light source for precise laser surgery. In addition, it can be used as pump source for the mid- and far-infrared laser system, which is of great value for the development of long-wave lasers. Research shows that the cooperative up-conversion between Er ions can suppress the population bottleneck caused by the long lifetime of the laser lower energy level, which significantly improves the laser efficiency. However, the proposed “high concentration doping” scheme cause heavy thermal loads on the gain crystals, which limites the enhancement of laser power. This paper briefly summarizes the research results on the self-termination and cooperative up-conversion of Er3+-doped crystal lasers, and introduces the current experimental schemes and research progress to achieve high-power lasers near 3 μm. Finally, the development of high-power Er3+ based near 3 μm laser is prospected.
张振, 苏良碧. 掺Er3+晶体近3 μm中红外激光研究进展[J]. 人工晶体学报, 2020, 49(8): 1361. ZHANG Zhen, SU Liangbi. Research Progress of Near 3 μm Mid-infrared Laser Based on Er3+ Doped Single Crystals[J]. Journal of Synthetic Crystals, 2020, 49(8): 1361.