Gasdynamic laser
US4413345A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 9, 1982 |
| Grant date | Nov 1, 1983 |
| Priority date | — |
| Expiry date | Jun 9, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/041
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a gasdynamic laser in which the hot flowing lasing medium (e.g. CO.sub.2 --N.sub.2) is cooled by expansion in a Laval nozzle 1, liquid droplets are introduced into the expanding lasing medium to increase the cooling effect. The liquid can be water, preferably heavy water, from a container 4 pressurized by the laser medium in plenum 6 and introduced from pipes 3 into a region immediately before the nozzle neck 2 so as to be atomized and accelerated through the neck 2. Evaporation occurs downstream of the neck and causes an increase in the cooling. The droplets preferably have a size in the range 1-20 .mu.m and may contain dissolved CO.sub.2. The droplets may be dispersed in a super cooled gas which is then injected into the lasing medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.