Continuous wavelength tunable laser source with optimum orientation of grating and gain medium
US8467430B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 20, 2011 |
| Grant date | Jun 18, 2013 |
| Priority date | — |
| Expiry date | Sep 20, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/3422
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An external cavity laser assembly (10) that generates a light beam (12) includes a gain medium (14) and a diffraction grating (24). The gain medium (14) has a growth direction (14C), a fast axis (14A), a first facet (34A), and a second facet (34B) that is spaced apart from the first facet (34A). The gain medium (14) emits from both facets (34A) (34B). Further, a beam polarization (30) of the light beam (32) emitting from the second facet (34B) is perpendicular to the growth direction (14C) and the fast axis (14A). The grating (24) includes a plurality of grating ridges (24A) that are oriented parallel to the beam polarization (30). Moreover, each of the grating ridges (24A) can have a substantially rectangular shaped cross-sectional profile.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.