Control method of selecting wavelength of optical filter, wavelength control method of output light from light outputting apparatus, wavelength division multiplexing method in optical communication system and method for correcting relation between control
US5774243A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 3, 1996 |
| Grant date | Jun 30, 1998 |
| Priority date | — |
| Expiry date | Oct 3, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/675
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Disclosed in this application is a method for correcting the relation between a control signal for controlling a selecting wavelength of an optical filter and the selecting wavelength of the optical filter. In the present invention, the selecting wavelength of the optical filter is swept in a wavelength range comprising wavelengths of light of first and second wavelengths generated by optical frequency modulation, and the above correction is carried out based on a difference between values of the control signal when the light of the first and second wavelengths is selected. A wavelength difference is normally controlled with high accuracy between light of two wavelengths generated by optical frequency modulation, and the present invention thus involves performing the above correction based on the wavelength gap controlled with high accuracy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.