Method for decreasing and compensating the transmission loss at a wavelength-division-multiplexed passive optical network and an apparatus therefor
US7171123B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 2003 |
| Grant date | Jan 30, 2007 |
| Priority date | — |
| Expiry date | Aug 15, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J14/0282
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a wavelength-division multiplexed passive optical network. In particular, it relates to a technology for minimizing the optical loss at a wavelength-division multiplexed passive optical network based on wavelength-locked light source Thereby it improves the transmission quality and increases the transmission distance.A 4-port optical path setting device of the present invention increases the amount of light injected into an optical transmitter and thereby improves the wavelength-locking characteristic of a light source. In addition, it can decrease the optical transmission loss in an optical transmission path, and by an optical amplifier being inserted therein; it can also compensate the optical loss in an optical transmission path.In the present invention, a 4-port optical path setting device having the characteristics described above and a method for fault recovery without an additional optical loss are presented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.