Method and apparatus for frequency doubling a laser beam
US4413342A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 1980 |
| Grant date | Nov 1, 1983 |
| Priority date | — |
| Expiry date | Nov 20, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/109
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method and apparatus for providing coincident orthogonally-polarized laser beams having twice the frequency of a fundamental frequency emitted by a laser source is disclosed. A second harmonic generator within a laser resonator cavity causes frequency-doubled laser beams to travel in opposite directions along an axis thereon. One of the beams undergoes a polarization change of substantially 90.degree. and is returned for travel along the laser axis in the same direction as a second frequency-doubled beam which has not undergone a polarization change. The orthogonally-polarized beams are then emitted through an output mirror designed for transmitting beams of twice the frequency of the fundamental beam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.