Optical harmonic generator
US4510402A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 10, 1982 |
| Grant date | Apr 9, 1985 |
| Priority date | — |
| Expiry date | Jun 10, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/37
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A pair of uniaxial birefringent crystal elements are fixed together to form a serially arranged, integral assembly which, alternatively, provides either a linearly or elliptically polarized second-harmonic output wave or a linearly polarized third-harmonic output wave. The "extraordinary" or "e" directions of the crystal elements are oriented in the integral assembly to be in quadrature (90.degree.). For a second-harmonic generation in the Type-II-Type-II angle tuned case, the input fundamental wave has equal amplitude "o" and "e" components. For a third-harmonic generation, the input fundamental wave has "o" and "e" components whose amplitudes are in a ratio of 2:1 ("o":"e" reference first crystal). In the typical case of a linearly polarized input fundamental wave this can be accomplished by simply rotating the crystal assembly about the input beam direction by 10.degree.. For both second and third harmonic generation input precise phase-matching is achieved by tilting the crystal assembly about its two sensitive axes ("o").
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.