发明名称 |
Waveguides for use in acousto-optical mode converters and method for making the same |
摘要 |
<p>The invention relates to optical birefringent waveguides, acousto-optical devices using such optical waveguides and an acoustic waveguide formed in a substrate as well as a manufacturing method therefore. The optical waveguides of the invention exhibit a small birefringent variation with respect to a change of waveguide parameters, if the fundamental mode propagating in the optical waveguide has a propagation constant near to the cut-off condition. The optical waveguide dimensions are typically chosen such that the cut-off wavelength of the waveguide is below 1650 nm for an operating wavelength in the window between 1530 nm and 1565 nm. The acousto-optic mode converter using such optical waveguides have a superior conversion characteristic over the conversion frequency with reduced side lobes. Therefore, using the thin and narrow optical waveguides of the invention, a superior performance of the acousto-optical devices using such an optical waveguide can be obtained. <IMAGE></p> |
申请公布号 |
EP0969310(A1) |
申请公布日期 |
2000.01.05 |
申请号 |
EP19990110918 |
申请日期 |
1999.06.04 |
申请人 |
PIRELLI CAVI E SISTEMI S.P.A. |
发明人 |
BOSSO, SERGIO;HERMANN, HARALD;MORASCA, SALVATORE;SCHMID, STEFFEN |
分类号 |
G02B6/134;G02B6/12;G02F1/125;G02F1/335;(IPC1-7):G02F1/125;G02B6/13 |
主分类号 |
G02B6/134 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|