Multiple crystal non-linear frequency conversion apparatus
US5477378A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 11, 1994 |
| Grant date | Dec 19, 1995 |
| Priority date | — |
| Expiry date | Aug 11, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/37
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A non-linear frequency conversion device is tunable over a wide tuning range. An input source provides a first input beam with a frequency .lambda.1. A first frequency conversion crystal has an input beam face that is cut at a phase matching angle .theta.1 and is positioned on a first stage at a stage angle .alpha.1. The first frequency conversion crystal provides frequency conversion of the input beam of frequency .lambda.1 to a selected frequency .lambda.2 of a first portion of the selected tuning range. A second frequency conversion crystal has an input beam face that is cut at a phase matching angle .theta.2 and is positioned on a second stage at a stage angle .alpha.2. The second frequency conversion crystal provides frequency conversion of the input beam from a frequency .lambda.1 to a selected frequency .lambda.3 of a second portion of the selected tuning range. Only one of the frequency conversion crystals provides frequency conversion in the range for a particular input wavelength, while the other crystal is inactive, and serves as a beam displacement compensator. The non-linear frequency conversion device can be used for second harmonic generation, sum frequency mixing, d…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.