Semiconductor laser with external resonator
US10615569B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 7, 2017 |
| Grant date | Apr 7, 2020 |
| Priority date | — |
| Expiry date | Feb 7, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/32341
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A semiconductor laser device with external resonator with stable longitudinal mode regardless of variation of drive current is disclosed. The device includes: a semiconductor light-emitting element having a pair of end faces with a light emitting section disposed therebetween, and an external resonator configured to oscillate light emitted from the semiconductor light-emitting element, the external resonator being formed by a resonator mirror disposed outside the semiconductor light-emitting element and one of the pair of end faces that is farther from the resonator mirror, wherein, as the semiconductor light-emitting element, a semiconductor light-emitting element having a structure which does not oscillate light emitted therefrom by itself is used. The device further includes a wavelength control element disposed in the optical path within the external resonator and configured to select a wavelength range of the light, and a driver circuit configured to perform fast modulation drive of the semiconductor light-emitting element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.