Laser & Optoelectronics Progress, Volume. 52, Issue 9, 91403(2015)
Study of Buried Waveguide Written in LiNbO3 Crystal by High Repetition Rate Femtosecond Laser
A buried waveguide in LiNbO3 crystal is fabricated,by using the femtosecond laser which repetition rate is 25 MHz.The etching region can be divided into two regions which are inner interaction region and thermally modified region respectively.The coupling experiment shows two single mode buried waveguides are generated in the thermally modified region,and the propagation loss of the two waveguides are below 1.5 dB/cm.At the same time,the inner interaction region leading to a low transmittance.The Raman spectrum of the etching region is measured which shows the light-guide region is densificated by the thermal effect of high repetition,and there is a large-scale defects in the inner interaction region.
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Fan Zongxue, Feng Jie, Liu Ang, Yang Yongjia, Zhou Zigang. Study of Buried Waveguide Written in LiNbO3 Crystal by High Repetition Rate Femtosecond Laser[J]. Laser & Optoelectronics Progress, 2015, 52(9): 91403
Category: Lasers and Laser Optics
Received: Feb. 2, 2015
Accepted: --
Published Online: Aug. 28, 2015
The Author Email: Zongxue Fan (1596561081@qq.com)