光学
材料科学
光纤激光器
二次谐波产生
皮秒
放大器
模式音量
非线性光学
物理
光电子学
保偏光纤
激光器
光纤
光纤传感器
CMOS芯片
作者
Mio Koyama,Akito Shimomura,Katsuhiko Miyamoto,Takashige Omatsu
标识
DOI:10.1007/s00340-014-5879-x
摘要
The frequency-doubling of a picosecond vortex fiber laser, formed of a 1-μm picosecond master laser and a large-mode-area fiber amplifier by using a nonlinear LiB3O5, crystal, was performed. A maximum second-harmonic power of 7.7 W was achieved, corresponding to a conversion efficiency of 31 %. The second harmonic had an annular spatial form owing to a phase singularity with a doubled topological charge, and its wavefront helicity was selectively controlled by tuning the stress applied to the fiber amplifier.
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