期刊
IEEE PHOTONICS TECHNOLOGY LETTERS
卷 23, 期 19, 页码 1406-1408出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2011.2161866
关键词
Integrated optics; multimode interference (MMI) coupler; silicon-on-insulator (SOI); silicon wire waveguide; subwavelength grating (SWG)
资金
- Spanish Ministerio de Ciencia [TEC2009-10152]
- Formacion del Profesorado Universitario scholarship [AP-2006-03355]
- Andalusian Regional Ministry of Science [TIC-02946]
The performance of multimode interference (MMI) couplers in silicon waveguides is limited by the high lateral refractive index contrast. Here we propose the use of subwavelength gratings (SWGs) in the lateral cladding regions of the MMI to reduce the index contrast. Our approach significantly reduces the mode phase error while at the same time allowing a single etch step process. Using a z-periodic lateral SWG, we design a 2 x 4 MMI that operates as a 90 degrees hybrid for a coherent optical receiver. This complex device exhibits a common mode rejection ratio (CMRR) and a phase error of less than -24 dBe and 2 degrees, respectively, over the full C-band. Compared to MMI with a homogenous lateral cladding, using subwavelength refractive index engineering effectively extends the receiver bandwidth from 36 to 60 nm.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据