Transient optical power suppressing apparatus, method, and network
US7483205B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 28, 2004 |
| Grant date | Jan 27, 2009 |
| Priority date | — |
| Expiry date | Dec 30, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/06825
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An apparatus for suppressing optical power transients includes a variable optical attenuator receiving an input optical signal and outputting an output optical signal; an optical power sensing element coupled to the input optical signal and sensing a portion of the input optical signal; and a feedforward loop controller coupled to the variable optical attenuator and to the optical power sensing element; the feedforward control loop providing feedforward control of the variable optical attenuator to reduce optical power transients of the input optical signal and maintain a substantially constant output power based on the input optical power and a reference value; the variable optical attenuator having a default opaque state in which the input optical signal is substantially attenuated when power is not being supplied to said variable optical attenuator. Variations include feedback loop controllers and a combination feedback and feedforward loop controllers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.