@inproceedings{ef58dd0a515d41c996566cb60f416848,
title = "A GRIN medium coupler and its application in light beam spot conversion",
abstract = "GRIN medium with a lateral sech refractive index variation, can make normal-incident light beam gradually curve to the medium with a larger refractive index, and periodically converge the light beam to a point smoothly and continuously. This property of GRIN medium can be used as a coupl er to realize a mode spot size conversion. This paper mainly discussed the transmission property of Gaussian light beam in a sech GRIN medium by numerical simulation. SOI waveguide is widely used in the photonic integrated circuit. To achieve a higher coupling efficiency between single mode optical fiber and single mode SOI slab waveguide, which suffer a great light beam coupling loss for the mismatch of the spot size. The GRIN medium coupling structures are designed as a coupler, with symmetric refractive index distribution and asymmetric refractive index distribution. The insertion loss calculated in theory are 0.71dB and 1.35dB respectively, which has a significant improvement in coupling loss, compared with the 30dB coupling loss caused by direct butt -joint transmission.",
keywords = "GRIN medium, SOI waveguide, optical coupling",
author = "Ning Wang and Fangkui Sun and Qingfeng Li and Lixue Chen",
year = "2012",
doi = "10.1117/12.1000063",
language = "英语",
isbn = "9780819493149",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
booktitle = "Information Optics and Optical Data Storage II",
note = "Information Optics and Optical Data Storage II ; Conference date: 06-11-2012 Through 07-11-2012",
}