Lv Jing, Bai Jing, Zhou Kaiming, Mei Xuesong, Wang Kedian, Li Ming, Cheng Guanghua
Opt Lett. 2017 Sep 1;42(17):3470-3473. doi: 10.1364/OL.42.003470.
The L-shape waveguide was written in fused silica using a femtosecond laser with beam shaping. The guiding structure supports good light turning; 0.88 dB/turn was achieved at the silica-air interface. By using the finite-different time-domain method, the turn loss due to the turning structure and refractive index of the L-shape waveguide has been simulated. The results show that the proposed method has unprecedented flexibility in fabricating a 90°-bend waveguide.
采用具有光束整形功能的飞秒激光在熔融石英中写入L形波导。该波导结构具有良好的光转向性能，在石英-空气界面处实现了0.88 dB/转的光转向损耗。利用时域有限差分法对L形波导的转向结构和折射率引起的转向损耗进行了模拟。结果表明，该方法在制造90°弯曲波导方面具有前所未有的灵活性。
