金刚石拉曼钠导星激光器技术研究进展

摘要/Abstract

摘要： 基于钠层的589 nm 激光导引星技术, 结合地基光学望远镜自适应光学系统, 可以有效补偿大气扰动造成的光信号波前畸变, 在天文观测、星地激光通信、空间碎片跟踪等诸多领域有着重要的应用前景。介绍了一种新型的589 nm 钠导星激光器技术:金刚石拉曼钠导星激光器。金刚石晶体超高的热导率和无空间烧孔效应的增益特性是提高激光输出功率和实现单纵模运转的关键, 目前已获得22 W 的连续波单频钠导星激光器输出。金刚石拉曼激光器技术提供了一种实现高功率钠激光输出的高效方案, 并为高功率微秒脉冲、高重频脉冲、频率啁啾等新型钠导星激光器系统提供了新的思路。

关键词: 激光技术, 钠导星激光器, 受激拉曼散射, 金刚石拉曼激光器, 单频激光器

Abstract: Sodium guide star generated in sodium layer by 589 nm laser is considered as a critical component for ground-based optical telescope adaptive optical systems to correct the atmospheric aberrations of light transmission. Such kind of systems are of intense interest for applications in astronomical observations, ground-space optical communications and space debris tracking. Here, a novel sodium guide star laser based on diamond Raman technique is proposed and demonstrated. Output power scaling and single frequency operation are favored for the novel laser due to the high thermal conductivity of diamond crystal and the gain nature of the spatial hole burning-free. Recently, up to 22 W single mode diamond Raman laser at 589 nm had been demonstrated. Diamond Raman laser affords a highly efficient scheme for achieving high power sodium laser, and moreover, it is well suited to achieving microsecond pulsed, high repetition rate pulsed, and frequency chirped formats of interest for advanced sodium guide star laser systems.

Key words: laser technology, sodium guide star laser, stimulated Raman scattering, diamond Raman laser, single frequency laser

中图分类号:

TN248

杨学宗, ∗ , 冯衍∗. 金刚石拉曼钠导星激光器技术研究进展[J]. 量子电子学报, 2020, 37(4): 447-455.

YANG Xuezong, ∗, FENG Yan∗. Diamond Raman Lasers for Sodium Guide Star[J]. Chinese Journal of Quantum Electronics, 2020, 37(4): 447-455.

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