超快激光在Yb:YAG内刻写双线型光波导的研究

唐文龙; 宋琼阁; 徐庆安; 刘欣; 程光华

doi:doi:10.3788/aos201434.1232002

光学学报, 2014, 34 (12): 1232002, 网络出版: 2014-11-04

超快激光在Yb:YAG内刻写双线型光波导的研究下载： 505次

Study on Writing of Double Line Waveguide in Yb:YAG with Ultrafast Laser

论文大纲

唐文龙 ^1,2,*宋琼阁 ^1,2徐庆安 ³刘欣 ¹程光华 ¹

作者单位

¹ 中国科学院西安光学精密机械研究所瞬态光学与光子技术国家重点实验室, 陕西西安 710119

² 中国科学院大学, 北京 100049

³ 北京控制工程研究所, 北京 100190

超快激光集成光学掺镱钇铝石榴石晶体光波导波导激光 ultrafast laser integrated optics Yb3+ doped yttrium aluminum garnet crystal optical waveguide waveguide laser

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摘要

研究了使用钛宝石放大器输出的重复频率为50 kHz、中心波长为775 nm、脉冲宽度为160 fs的超快激光在掺镱钇铝石榴石(Yb:YAG)中刻写双线型光波导的过程。发现了波导具有偏振导光现象，偏振态平行于双线方向的激光可以导通，偏振态垂直于双线方向的激光不能导通。详细分析了双线间距、刻写速度和激光脉冲能量对波导形成的影响，在双线间距为30 μm、刻写速度为400 μm/s、脉冲能量为5.0 μJ的条件下写入的光波导导光特性良好。利用近场模重建了该波导折射率二维分布，波导区域折射率相对于基质改变量的最大值为1.8×10-4，且该波导在940 nm半导体激光抽运激励下，获得了1030.5 nm的连续激光输出，激光功率为4.7 mW。

Abstract

The writing of double line waveguide in Yb3+ doped yttrium aluminum garnet (Yb:YAG) crystal is studied by using titanium sapphire laser with the pulse width of 160 fs, central wavelength of 775 nm and repetition frequency of 50 kHz. The phenomenon of polarization guiding is discovered in the waveguide. The laser with polarization parallel to the direction of double line can be guided, but the laser with polarization perpendicular to the direction of double line cannot be guided. The effects of written parameters, such as double line separation, laser pulse energy and writing speed, on the formation of the waveguide are analyzed. Experimental results show that the waveguide has the good property of guiding under the writing conditions of double line separation of 30 μm, writing speed of 400 μm/s and pulse energy of 5.0 μJ. Bivariate distribution of the waveguide refractive index is reconstructed by near-field mode and the maximum refractive index change is 1.8×10-4. A continuous waveguide laser with a wavelength of 1030.5 nm is obtained and the output power is 4.7 mW.

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唐文龙, 宋琼阁, 徐庆安, 刘欣, 程光华. 超快激光在Yb:YAG内刻写双线型光波导的研究[J]. 光学学报, 2014, 34(12): 1232002. Tang Wenlong, Song Qiongge, Xu Qing′an, Liu Xin, Cheng Guanghua. Study on Writing of Double Line Waveguide in Yb:YAG with Ultrafast Laser[J]. Acta Optica Sinica, 2014, 34(12): 1232002.

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