Laser light source device
US4637027A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 26, 1984 |
| Grant date | Jan 13, 1987 |
| Priority date | — |
| Expiry date | Sep 26, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/14
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Disclosed is a laser light source device having a laser and an external resonator, wherein as a base, a Faraday rotator is provided at the laser side front of a reflection plane of the resonator so that clockwise and counter-clockwise circular polarizations which have frequencies slightly different to each other are generated, and if a laser such as a semiconductor laser having an eigen-mode having a linear polarization is applied, elements which rotate a polarization by 90 degrees by one emission-and-return through the element, for example, quarter-wave plates, are arranged, The device does not need a strong magnetic field or a strong electric field, and can easily generate lights which are a constant strength. Thus the device can be miniaturized and a high efficiency obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.