Apparatus for light amplification
US6483635B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 7, 2001 |
| Grant date | Nov 19, 2002 |
| Priority date | — |
| Expiry date | Jun 7, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/14
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A system for reducing reflection of an optical system can reduce or eliminate reflection at facets of a semiconductor gain medium and can suppress natural longitudinal modes produced within the semiconductor gain medium. In combination with external feedback, the system can allow more precise wavelength control of the light output of a laser, thereby allowing the laser to be used in a dense wavelength division multiplexing system. The system employs a patterned relief surface disposed on a facet of a gain medium. The patterned relief surface may be a “motheye” pattern having a plurality of conical posts disposed on the surface of the facet. The system may be combined with conventional devices, such as a Bragg reflector or a microelectromechanical component, to further improve wavelength control of a resonant optical cavity, thereby improving the operation of optical communications systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.