Apparatus and method for providing a single-mode grating-outcoupled surface emitting laser with detuned second-order outcoupler grating
US7313159B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 23, 2004 |
| Grant date | Dec 25, 2007 |
| Priority date | — |
| Expiry date | Apr 3, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/1221
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An improved grating-outcoupled surface-emitting semiconductor laser architecture is provided. A second-order grating is placed between two distributed Bragg reflector gratings. The period of the second order grating is positively or negatively detuned from the distributed Bragg reflector selected optical wavelength at which the laser operates. Detuning of the second-order grating towards shorter or longer wavelengths allows kink-free, linear LI curves light output versus forward current) for grating-outcoupled surface-emitting lasers. Due to the detuning of the outcoupler grating, the outcoupled radiation emits two beams that deviate slightly from the normal axis. A design point may then be chosen where the power outcoupled by symmetric and antisymmetric modes cross and where the outcoupled power is independent of the phase variation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.