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| 棱边倒角面抽运热键合平板波导固体激光器 | |
| 引用本文： | 张海涛,康宏向,王东生,巩马理. 棱边倒角面抽运热键合平板波导固体激光器[J]. 中国激光, 2008, 35(s1): 1-4 |
| 作者姓名： | 张海涛 康宏向 王东生 巩马理 |
| 作者单位： | 张海涛:清华大学精密仪器与机械学系激光与光子技术研究室, 北京 100084 康宏向:清华大学精密仪器与机械学系激光与光子技术研究室, 北京 100084 王东生:清华大学精密仪器与机械学系激光与光子技术研究室, 北京 100084 巩马理:清华大学精密仪器与机械学系激光与光子技术研究室, 北京 100084 |
| 摘 要： | 采用晶体热键合方法加工制作了YAG/Nd:YAG/YAG单包层平板波导,波导晶体几何尺寸为12 mm×5 mm×1 mm,其中中心掺杂层Nd:YAG厚度约为0.2 mm,对称外包层YAG厚度约为0.4 mm。采用一种新的抽运方法—棱边倒角面抽运方法对晶体进行抽运:波导晶体的一条12 mm长棱边加工成大小为12 mm×0.3 mm的倒角面,快轴准直抽运激光二极管(LD)发出的抽运光经聚焦后从倒角面入射进入晶体,抽运吸收效率约为82%。激光器谐振腔采用平-平腔,其中全反镜直接在波导晶体端面镀高反膜实现,输出镜尽可能靠近晶体另一端面,腔长约12mm。当输出镜透射率为6.6%,激光二极管抽运光功率约为49.5 W时,得到输出激光功率13.6 W,光-光转换效率约27.5%,导波方向光束质量M2因子1.9。激光器实现了较高的光-光转换效率和较好的导波方向光束质量。 |
| 关 键 词： | 激光技术 固体激光器 棱边倒角面抽运 平板波导固体激光器 热键合 |
An Edge-Bevel-Pumped Thermally Bonded Planar Waveguide Solid-State Laser |
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| Abstract: | By thermal bonding technology the single-clad YAG/Nd:YAG/YAG planar waveguide crystal has been fabricated. The geometry of the waveguide crystal is 12 mm×5 mm×1 mm, and Nd:YAG core is 0.2 mm thick and symmetry claddings are 0.4 mm thick. A novel pump scheme is employed——edge-bevel pumping: A 12 mm long edge is chamfered as a 0.3 mm wide bevel, the pump light from the fast-axis-collimated laser diode (LD) is focused and coupled into the crystal through the edge bevel. The pump efficiency is 82%, when the transmittance of the output mirror is 6.6% and the diode pump power is 49.5 W, the output power is 13.6 W with flat-flat cavity, the optical-optical conversion efficiency is 27.5%, and the transverse M2 factor is 1.9. The laser achieves a relatively high optical-optical conversion efficiency and excellent beam quality in transverse direction. |
| Keywords: | laser technique solid-state laser edge-bevel pump planar waveguide solid-state laser thermal bonding |