Continuous wave, frequency doubled solid state laser systems with stabilized output
US4887270A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 29, 1988 |
| Grant date | Dec 12, 1989 |
| Priority date | — |
| Expiry date | Nov 29, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/0612
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A solid-state laser system for producing a frequency-doubled CW laser output beam having a stabilized output. The laser system includes within a three-mirror resonator cavity, a Nd: YAG laser rod operating at an output wavelength of 1.064 .mu.m in the TEMoo transverse mode, and a KTP frequency-doubling crystal. At one end of the laser cavity the beam is reflected from a folding mirror through the frequency-doubling crystal to another reflecting mirror which reflects both the fundamental wavelength of the output beam from the laser rod, and also the doubled frequency beam at a wavelength of 0.532 .mu.m back through the frequency-doubling crystal onto the folding reflector. The folding reflector is coated to reflect light at the longer wavelength but transmits substantially all of the light incident upon it at the 0.532 .mu.m wavelength. Cladding of the laser rod with Spinel or quartz and/or laminar flow cooling of the laser rod are utilized to maintain the temperature distribution over the surface of the laser rod subsantially constant so as to stabilize the output power level at the frequency-doubled wavelength.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.