| Femtosecond laser-inscribed waveguides in Nd3^＋：y3^＋：SrF2 crystals |
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| 作者姓名： | 孙盛芝 苏良碧 袁玉峰 孙真荣 |
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| 作者单位： | [1]State Key Laboratory of Precision Spectroscopy, and Department of Physics, Ea~t China Normal University, Shanghai 200062, China [2]Key Laboratory of Transparent and Opto-Functional Advanced Inorganic Materials,Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201800, China |
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| 基金项目： | This work was supported by the National Natural Sci- ence Foundation of China （Nos. 11004060, 11027403, 51132004, 61178056, and 91222112）. |
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| 摘 要： | Optical waveguides are fabricated in Nd3^＋：y3^＋：SrF2 crystals by a 1-kHz femtosecond laser using the double-line approach. Waveguides with different separations （10, 15, and 20 μm） between two consecutive optical breakdown tracks are produced, and their optical performances are explored by end-fire coupling to 780-and 532-nm lasers. Propagation loss of the waveguide with 20-pro separation is estimated. The micro- photohmlinescence and micro-Raman spectra indicate that the original fluorescence and lattice structure of the Nd3^＋：y3^＋：SrF2 crystals are well preserved in the waveguide. Therefore, the obtained waveguide structures are promising candidate for application in integrated waveguidc lasers.
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| 关 键 词： | 飞秒激光 光波导 晶体 激光器应用 钕 光刻 光学击穿 光学性能 |
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