Resonant nonlinear laser beam converter
US5206868A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 24, 1992 |
| Grant date | Apr 27, 1993 |
| Priority date | — |
| Expiry date | Jan 24, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/141
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Multiple step nonlinear conversion apparatus for optical frequencies which make use of resonant enhancement to increase net conversion efficiency. In one embodiment, two nonlinear converters are disposed in a single buildup cavity. In a second embodiment, two buildup cavities are provided, with one nonlinear element in each. In the single cavity configuration of the invention, the pump laser output is resonated in a buildup cavity and a first nonlinear element is used to generate the second harmonic. The second harmonic is resonated to enhance the doubling efficiency. A second nonlinear element mixes the pump beam and the second harmonic to produce an output beam at a linear combination of the two resonated frequencies. The conversion efficiency of the mixing is enhanced by the buildup factors at both the pump frequency and the second harmonic frequency. The buildup factors produced by the resonator enhance both the doubling and the mixing steps simultaneously. This is a versatile nonlinear conversion approach which applies both to frequency tripling and frequency quadrupling. In a special case, the third harmonic of the pump frequency is produced if the phase matching condition is…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.