Abstract
We present an efficient segmented-stepwise method to design a short and low-loss mode-size converter. A silicon-on-insulator platform-based converter with 20 μm length and 95.2% conversion efficiency is acquired by taking only 10 optimization generations using 2D-FDTD method. A 3D-FDTD simulation is performed to verify the calculated results, returning an efficiency of 92.1%. The proposed device can be used to connect a 12-μm-wide waveguide and a 0.5-μm-wide single-mode waveguide, with comparable performance of a regular scheme using 150-μm-long linear taper. For demonstration, the converter was fabricated by electron-beam-lithography and inductively-coupled-plasma etching. A conversion loss of at 1550 nm was experimentally measured.
© 2014 Optical Society of America
Full Article | PDF ArticleMore Like This
Hang Guan, Yangjin Ma, Ruizhi Shi, Ari Novack, Jingcheng Tao, Qing Fang, Andy Eu-Jin Lim, Guo-Qiang Lo, Tom Baehr-Jones, and Michael Hochberg
Opt. Lett. 39(16) 4703-4706 (2014)
Yi Zou, Harish Subbaraman, Swapnajit Chakravarty, Xiaochuan Xu, Amir Hosseini, Wei-Cheng Lai, Parker Wray, and Ray T. Chen
Opt. Lett. 39(10) 3070-3073 (2014)
Qingzhong Deng, Lu Liu, Xinbai Li, and Zhiping Zhou
Opt. Lett. 39(19) 5665-5668 (2014)