Optical amplification apparatus
US9019593B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2012 |
| Grant date | Apr 28, 2015 |
| Priority date | — |
| Expiry date | Sep 1, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S2301/06
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical amplification apparatus includes a front-stage semiconductor optical amplifier which amplifies an input light and a rear-stage semiconductor optical amplifier which amplifies an amplified light outputted from the front-stage semiconductor optical amplifier. The front-stage semiconductor optical amplifier exercises auto level control of an output light by exercising variable control of driving current which flows according to applied voltage higher than light emitting threshold voltage of an internal optical amplification element. The rear-stage semiconductor optical amplifier performs gate switching of a transmitted light by exercising switching control of driving current. By doing so, distortion of a waveform is controlled and optical communication quality can be improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.