Fernandes Luís A, Grenier Jason R, Herman Peter R, Aitchison J Stewart, Marques Paulo V S
Institute for Optical Sciences, and the Department of Electrical and Computer Engineering, University of Toronto, Toronto, Ontario, Canada.
Opt Express. 2011 Sep 12;19(19):18294-301. doi: 10.1364/OE.19.018294.
Femtosecond laser (300 fs, 500 kHz, 522 nm) fabrication of optical waveguides in bulk silica glass is extended to waveguide retarders. We study the merits of nanograting orientation (perpendicular or parallel to the waveguide) for generating high and low birefringence waveguides. This is used together with other exposure condition to control the waveguide birefringence between 10⁻⁵ and 10⁻⁴ permitting for the simultaneous fabrication of the waveguides and the tuning of the retardance demonstrating quarter and half-wave retarders in the 1200 nm to 1700 nm spectrum. The wavelength dependence of the birefringence is also characterized over a range of exposure conditions.
飞秒激光（300飞秒、500千赫兹、522纳米）在块状石英玻璃中制造光波导的技术被扩展到波导延迟器。我们研究了纳米光栅取向（垂直或平行于波导）对于产生高双折射和低双折射波导的优点。这与其他曝光条件一起用于控制波导双折射在10⁻⁵至10⁻⁴之间，从而能够同时制造波导并调节延迟，在1200纳米至1700纳米光谱范围内展示四分之一波和半波延迟器。在一系列曝光条件下还对双折射的波长依赖性进行了表征。
