Liao Yang, Qi Jia, Wang Peng, Chu Wei, Wang Zhaohui, Qiao Lingling, Cheng Ya
State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China.
School of Physical Science and Technology, Shanghai Tech University, Shanghai 200031, China.
Sci Rep. 2016 Jun 27;6:28790. doi: 10.1038/srep28790.
We report on fabrication of tubular optical waveguides buried in ZBLAN glass based on transverse femtosecond laser direct writing. Irradiation in ZBLAN with focused femtosecond laser pulses leads to decrease of refractive index in the modified region. Tubular optical waveguides of variable mode areas are fabricated by forming the four sides of the cladding with slit-shaped femtosecond laser pulses, ensuring single mode waveguiding with a mode field dimension as small as ~4 μm.
我们报道了基于横向飞秒激光直接写入技术在ZBLAN玻璃中制备埋入式管状光波导的方法。用聚焦飞秒激光脉冲照射ZBLAN会导致改性区域的折射率降低。通过用狭缝状飞秒激光脉冲形成包层的四个侧面，制备出具有可变模面积的管状光波导，确保了模场尺寸小至约4μm的单模波导。
