发明名称 |
Arrangements for reducing wavelength sensitivity in prism-coupled SOI-based optical systems |
摘要 |
An optical coupling system for use with multiple wavelength optical signals provides improved coupling efficiency between a free-space optical beam and a relatively thin, surface layer of an SOI structure ("SOI layer"), allowing for sufficient coupling efficiency (greater than 50%) over a predetermined wavelength range. An evanescent coupling layer, disposed between a coupling prism and an SOI layer, is particularly configured to improve the coupling efficiency. In one embodiment, the thickness of the evanescent layer is reduced below an optimum value for a single wavelength, the reduced thickness improving coupling efficiency over a predetermined wavelength range around a defined center wavelength. Alternatively, a tapered thickness evanescent coupling layer may be used to improve coupling efficiency (or a combination of reduced thickness and tapered configuration). Optical beam steering can be combined with a modified evanescent coupling layer to control the input beam launch angle and further improve coupling efficiency.
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申请公布号 |
US2004213518(A1) |
申请公布日期 |
2004.10.28 |
申请号 |
US20040833642 |
申请日期 |
2004.04.28 |
申请人 |
GHIRON MARGARET;GOTHOSKAR PARKASH;MONTGOMERY ROBERT KEITH;PATEL VIPULKUMAR;PATHAK SOHAM;SHASTRI KALPENDU;YANUSHEFSKI KATHERINE A. |
发明人 |
GHIRON MARGARET;GOTHOSKAR PARKASH;MONTGOMERY ROBERT KEITH;PATEL VIPULKUMAR;PATHAK SOHAM;SHASTRI KALPENDU;YANUSHEFSKI KATHERINE A. |
分类号 |
G02B6/12;G02B6/34;G02B6/42;G02B26/08;(IPC1-7):G02B6/34 |
主分类号 |
G02B6/12 |
代理机构 |
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