窄线宽纳秒脉冲2μm波段光参量振荡放大技术研究

项目名称： 窄线宽纳秒脉冲2μm波段光参量振荡放大技术研究

项目编号： No.61505230

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 无线电电子学、电信技术

项目作者： 李世光

作者单位： 中国科学院上海光学精密机械研究所

项目金额： 20万元

中文摘要： 窄线宽、高光谱特性的2μm波段脉冲中红外激光器在相干探测激光雷达、差分吸收雷达、激光医疗、激光光谱学、光电对抗、污染环境探测、激光遥感等方面具有重要应用前景，已经成为当前研究的热点，是亟需解决的关键技术。本项目提出了一种基于光学参量振荡放大技术产生2μm波段脉冲激光输出的新型技术方案，通过将单频1.06μm脉冲泵浦技术、种子注入技术、高稳定性OPO技术和OPA脉冲能量提升技术结合起来，旨在解决纳秒脉冲2μm激光输出频率控制、线宽压窄、脉冲能量定标大、可调谐、高光束质量、高频谱特性、高频率稳定性等关键技术问题，突破目前2μm固体激光器的技术瓶颈，探索实现窄线宽、高能量中红外波段脉冲激光技术新途径，为实现可靠、稳定的红外激光源在机载、星载激光雷达中的应用奠定技术基础。

中文关键词： LD泵浦；光参量振荡器；光参量放大器；单频激光器；种子注入

英文摘要： The 2-μm laser transmitters with narrow linewidth, high spectral character are useful for many applications, such as coherent detection ranging lidar, differential absorption lidar, laser medicine, high-resolution spectroscopy applications, optoelectrionic countermeasure, environment pollution detection, laser remote sensing, etc. Such lasers have become a research focus, and the key technology is needed to be solved. Based on the new scheme of optical parametric master oscillator and power amplifier (OP-MOPA), the 2-μm pulsed laser has been proposed in this project. Combining single frequency pulse 1.06-μm laser pumping, injection seeding, optical parametric oscillator with high property and optical parametric amplifier with rising pulse energy, the nanosecond pulse 2-μm laser output is realized，and the key technical problems including the frequency controlling, linewidth narrowing, single pulse energy rising, high efficient, tunable, and high beam quality will be solved in the present system. The OP-MOPA technique will break the technique bottleneck of the current 2-μm solid-state lasers, and explore a new technology path to realize narrow bandwidth, high single pulse energy for infrared solid state lasers, which will lay a technical foundation for stable and reliable mid-infrared lasers meeting the requirement in airborne and spaceborne lidar.

英文关键词： laser diode pumping;optical parametric oscillator;optical parametric amplifier;single frequency lasers;injection seeding