Laser amplifier
US5132978A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 13, 1990 |
| Grant date | Jul 21, 1992 |
| Priority date | — |
| Expiry date | Aug 13, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/5009
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A laser amplifier in which the effective refractive index of the active region for the TE and TM modes is sufficiently different to provide multiple mode ripple beat frequency overlap within a 3dB gain envelope peak. The active region is made highly asymmetric with an aspect ratio of at least 10:1 and preferably 20:1 in order to provide the effective refractive index difference. Steps, grading or uniform difference in the material refractive index may also be used. The confinement factor ratio is made as high as possible by providing different material refractive index in the orthogonal dimensions of the active region cross section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.