Optical amplifier transient control apparatus
US6678088B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 2, 2002 |
| Grant date | Jan 13, 2004 |
| Priority date | — |
| Expiry date | May 2, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/1305
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical amplifier control circuit and method controls transients and avoids the problems associated with measuring gain. The input power level is detected and amplified by a transient control setting to provide a desired gain value against which is compared the output power level. This transient control error may be used in conjunction with a constant power error and/or a constant current error such that the lowest of the error values is used to drive the pump laser. Current and power feedback signals and settings are used to derive the error values. Multiple pump lasers per stage may also be controlled and a multi-stage amp having a cascaded structure may be realized using the inventive techniques.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.