Method and apparatus for wavelength conversion of signal light
US6271960A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 26, 1999 |
| Grant date | Aug 7, 2001 |
| Priority date | — |
| Expiry date | Feb 26, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2/006
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A signal conversion device comprises a light source for emitting continuous wave (CW) light at a predetermined wavelength .lambda., an optical element having a saturable absorption function, and a wavelength demultiplexing circuit for separating signal light at a desired wavelength from signal light outputted from the optical element. A threshold value for optical transmission and absorption of the optical element having the saturable absorption area is set to a level such that applied signal light at a wavelength .lambda.s and the CW light outputted from the light source are absorbed at a light intensity level of either of the two lights, and are transmitted at a light intensity level of a total of the two lights.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.