Optical amplifiers using switched filter devices
US8294981B2 · kind B2 · utility
2Cited by
13References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 15, 2009 |
| Grant date | Oct 23, 2012 |
| Priority date | — |
| Expiry date | Feb 21, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/1608
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Described are Gain Flattening Filters (GFFs) implemented using mechanical translating assemblies to move selected thin film Gain Attenuating Filters (GAFs), and combinations of selected GAFs, into or out of the output path from an optical amplifier. The GAFs may be used singly, or in combinations that synthesize many target filter characteristics. The GFF is primarily adapted for WDM systems operating with a wavelength range of approximately 1520 nm to 1620 nm. Several embodiments are shown for effectively combining different GAFs to provide multiple GFF curves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.