Optical amplifier and optical transmission system including the optical amplifier
US6038063A · kind A · utility
42Cited by
2References
49Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 18, 1998 |
| Grant date | Mar 14, 2000 |
| Priority date | — |
| Expiry date | Mar 18, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S2301/04
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical amplifier relates to WDM (wavelength division multiplexing). The optical amplifier includes an optical amplifying unit, an ALC (automatic output level control) circuit for controlling the unit based on the output level thereof, and AGC (automatic gain control) circuit for controlling the unit based on the input and output levels thereof. A selecting circuit alternatively selects and operates the ALC and AGC circuits in accordance with a predetermined rule. Accordingly, the inconvenience occurring in the case of performing only one of ALC and AGC can be eliminated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.