Optical transmission apparatus with automatic gain control and automatic level control mode selection
US7554720B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 20, 2006 |
| Grant date | Jun 30, 2009 |
| Priority date | — |
| Expiry date | Apr 20, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/0797
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A transmission apparatus designed to be capable of monitoring faults which occur between the input stage of an optical multiplexer and the input stage of an optical amplifier, appropriately switching between automatic gain control and automatic level control, and outputting signal lights with appropriate optical power, without using a spectrum analyzer. The optical multiplexer combines the wavelengths of a plurality of signal lights. The optical amplifier is connected at the latter stage of the optical multiplexer, and operates in the automatic gain control mode or in the automatic level control mode, the automatic gain control mode maintaining a constant gain for wavelength-multiplexed signal light, the automatic level control mode maintaining constant output power for the wavelength-multiplexed signal light. A mode selector selects the automatic gain control mode or the automatic level control mode for the optical amplifier based on the total optical power of the plurality of signal lights to be input to the optical multiplexer and the optical power of the wavelength-multiplexed signal light to be input to the optical amplifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.