,CMOS compatible highly efficient grating couplers with a stair-step blaze profile

• 机 构: State Key Laboratory on Integrated Optoelectronics, Institute of Semiconductors,Chinese Academy of S
• 出 处: 中国物理B(英文版)
• 发表日期: 2011年7期
• 关键词: grating coupler blaze profile integrated optics silicon-on-insulator

A novel grating coupler with a stair-step blaze profile is proposed.The coupler is a CMOS process compatible device and can be used for light coupling in optical communication.The blaze profile can be optimized to obtain a high efficiency of 66.7% for the out-of-plane coupling at the centre wavelength of 1595 nm with a 1 dB bandwidth of 41 nm.Five key parameters of the stair-step blaze grating and their effects on the coupling are discussed for the application in L band telecommunication.","A novel grating coupler with a stair-step blaze profile is proposed.The coupler is a CMOS process compatible device and can be used for light coupling in optical communication.The blaze profile can be optimized to obtain a high efficiency of 66.7%for the out-of-plane coupling at the centre wavelength of 1595 nm with a 1 dB bandwidth of 41 nm.Five key parameters of the stair-step blaze grating and their effects on the coupling are discussed for the application in L band telecommunication.