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Journal Article
Performance Improvement in Silicon Arrayed Waveguide Grating by Suppression of Scattering Near the Boundary of a Star Coupler
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- Authors
- Jaegyu Park, Gyungock Kim, Hyundai Park, Jiho Joo, Sanggi Kim, Myung-Joon Kwack
- Issue Date
- 2015-06
- Citation
- Applied Optics, v.54, no.17, pp.5597-5602
- ISSN
- 1559-128X
- Publisher
- Optical Society of America (OSA)
- Language
- English
- Type
- Journal Article
- Project Code
- 14MB1300, Silicon Nanophotonics-based next-generation computer interface platform, Kim Gyungock
- Abstract
- We investigate the reduction of transition loss across the star coupler boundary in a silicon arrayed waveguide grating (AWG) by suppressing multimode generation and scattering near the boundary of a star coupler. Eightchannel silicon AWGs were designed with optimal conditions based on enhanced field matching in combination with ultrashallow etched structures. The fabricated AWG demonstrates an insertion loss down to 0.63 dB with a cross talk of -23 to -25.3 dB, exhibiting ~0.8 dB improvement of insertion loss and ~4 dB improvement of cross talk compared to the Si AWG fabricated with a conventional double-etch technique.
- KSP Keywords
- Cross Talk, Enhanced field, Field matching, Optimal conditions, Transition loss, arrayed waveguide grating(AWG), insertion loss, performance improvement