Optical transmission system, optical multiplexing transmission system, and related peripheral techniques
US5870213A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 21, 1998 |
| Grant date | Feb 9, 1999 |
| Priority date | — |
| Expiry date | Jan 21, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/06
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The invention provides a technique for optimizing transmission conditions to achieve large-capacity transmission, and also provides peripheral techniques for the practical implementation of optical multiplexing that makes large-capacity transmission possible. A transmission characteristic is measured in a transmission characteristic measuring section, and control of signal light wavelength in a tunable light source, control of the amount of prechirping, control of the amount of dispersion compensation, and/or control of optical power are performed to achieve the best transmission characteristic. Wavelength dispersion is deliberately introduced by a dispersion compensator, to reduce nonlinear effects. A tunable laser is used to optimize signal light wavelength for each optical amplification repeater section. Peripheral techniques, such as drift compensation, clock extraction, optical signal channel identification, clock phase stabilization, etc., are provided for the implementation of optical multiplexing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.