Optical switching device
US5742415A · kind A · utility
16Cited by
5References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 28, 1996 |
| Grant date | Apr 21, 1998 |
| Priority date | — |
| Expiry date | May 28, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J14/083
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A non-linear optical switch includes a semiconductor optical gain medium. The switch is arranged to switch a signal at a first wavelength in response to a control signal at a second wavelength applied to the optical gain medium. The refractive index of the gain medium is modified in response to the control signal. An optical holding signal at a third wavelength is applied to the gain medium. The optical holding signal pumps the optical gain medium and thereby fixes the Fermi level. The switch may be embodied in OTDM demultiplexers, clock recovery circuits, wavelength converters and other devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.