Tunable electro-absorption modulator and tunable laser
US6665457B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 10, 2001 |
| Grant date | Dec 16, 2003 |
| Priority date | — |
| Expiry date | Dec 7, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/0607
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electro-absorption modulator is tunable along with the laser. Tuning the electro-absorption modulator permits optimum detuning to be maintained, even though the laser is tuned over several tens of nm. One approach to tuning the electro-absorption modulator is to heat the electro-absorption modulator. A semiconductor laser device includes a semiconductor laser positioned on a substrate. The semiconductor laser produces output light that is tunable over a tuning range between a first wavelength and a second wavelength. An electro-absorption modulator is disposed to modulate the light produced by the semiconductor laser. The operating temperature of the electro-absorption modulator is tunable so as to maintain constant detuning over at least a portion of the tuning range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.