Method and unit for setting a wavelength to a tunable laser
US7301973B2 · kind B2 · utility
4Cited by
2References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 19, 2004 |
| Grant date | Nov 27, 2007 |
| Priority date | — |
| Expiry date | Jan 13, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/506
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
When a tunable laser is operating at any one of the different wavelengths, wavelength data is sampled and stored in a memory device. In the case where the same operating wavelength as a wavelength hitherto operated needs to be reset to the tunable laser, the wavelength data stored in the memory device is set to the tunable laser. This makes it possible to avoid a shift in wavelength due to age degradation of the tunable laser that selectively outputs any one of light signals of different wavelengths in dependence on the wavelength data set to the tunable laser.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.