Transmission wavelength control method permitting efficient wavelength multiplexing, optical communication method, optical transmitter, optical transmitter-receiver apparatus, and optical communication system
US5949562A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 14, 1997 |
| Grant date | Sep 7, 1999 |
| Priority date | — |
| Expiry date | May 14, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J14/0224
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A wavelength control method controls a wavelength of output light from an optical transmitter used in an optical communication system for performing wavelength-multiplexing. The method includes steps of causing light-output means of the optical transmitter to output light and guiding the output light of the light-output means and light used in the optical communication system to a wavelength tunable filter. The method also includes sweeping a selective wavelength of the wavelength tunable filter, and detecting, based on the sweeping, if a wavelength spacing between a wavelength of the output light, which is output from the light-output means, and a wavelength of the light used in the optical communication system, which is adjacent to the wavelength of the output light on a wavelength axis on either a longer wavelength side or a shorter wavelength side, is wider or narrower than a predetermined wavelength spacing. The method also includes performing control in which the wavelength of the output light is caused to approach the adjacent wavelength when the wavelength spacing is detected to be wider than the predetermined wavelength in said detecting step and the wavelength of the outp…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.