Femtosecond laser-inscribed waveguides in Nd^(3+):Y^(3+):SrF_2 crystals  

作　　者：孙盛芝 苏良碧 袁玉峰 孙真荣 

机构地区：[1]State Key Laboratory of Precision Spectroscopy,and Department of Physics,East China Normal University [2]Key Laboratory of Transparent and Opto-Functional Advanced Inorganic Materials,Shanghai Institute of Ceramics,Chinese Academy of Sciences

出　　处：《Chinese Optics Letters》2013年第11期75-78,共4页中国光学快报（英文版）

基　　金：supported by the National Natural Sci-ence Foundation of China(Nos.11004060,11027403,51132004,61178056,and 91222112)

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.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.

关 键 词：Ultrashort pulses 

分 类 号：TN248[电子电信—物理电子学]