Device and method for noresonantly Raman shifting ultraviolet radiation
US4144464A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 25, 1978 |
| Grant date | Mar 13, 1979 |
| Priority date | — |
| Expiry date | Jan 25, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/305
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A device and method for nonresonantly Raman shifting broad band uv excimer laser radiation, which enhances preselected Stokes signals by varying the pressure of the Raman scattering medium, the focal interaction length of the incident radiation within the Raman scattering medium and its power density level. Gaseous molecular H.sub.2, D.sub.2, CH.sub.4 (methane), HD and mixes thereof, and liquid N.sub.2 are used as the Raman scattering medium to frequency shift the outputs of high power KrF and ArF lasers. A cable fed discharge with an unstable resonant cavity configuration is utilized to produce the output laser power levels required for operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.