Long-pulse-width narrow-bandwidth solid state laser
US5689363A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 12, 1995 |
| Grant date | Nov 18, 1997 |
| Priority date | — |
| Expiry date | Jun 12, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/2383
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A long pulse laser system emits 500-1000 ns quasi-rectangular pulses at 527 nm with near diffraction-limited divergence and near transform-limited bandwidth. The system consists of one or more flashlamp-pumped Nd:glass zig-zag amplifiers, a very low threshold stimulated-Brillouin-scattering (SBS) phase conjugator system, and a free-running single frequency Nd:YLF master oscillator. Completely passive polarization switching provides eight amplifier gain passes. Multiple frequency output can be generated by using SBS cells having different pressures of a gaseous SBS medium or different SBS materials. This long pulse, low divergence, narrow-bandwidth, multi-frequency output laser system is ideally suited for use as an illuminator for long range speckle imaging applications. Because of its high average power and high beam quality, this system has application in any process which would benefit from a long pulse format, including material processing and medical applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.