Waveguide optical element and its driving method
US5157544A · kind A · utility
9Cited by
7References
32Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 22, 1991 |
| Grant date | Oct 20, 1992 |
| Priority date | — |
| Expiry date | Feb 22, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/5045
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A waveguide optical element includes a waveguide layer which is formed on a substrate, through which light propagates and which has an end face from which the propagation light becomes incident on the waveguide layer or emerges, a thin film formed on the end face of the waveguide layer, for increasing or decreasing a reflectance of light at end face, and control means having an electrode formed on a portion of the waveguide layer, for controlling a refractive index of the portion of the waveguide layer, which portion is in contact with the thin film. And its driving method is provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.