Eyesafe laser transmitter with brewster angle Q switch in single resonator cavity for both pump laser and optical parametric oscillator
US5841798A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 24, 1997 |
| Grant date | Nov 24, 1998 |
| Priority date | — |
| Expiry date | Apr 24, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/113
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An eyesafe laser (10) transmitter having a single resonator cavity (16) for both the pump laser and the optical parametric oscillator (22). A Nd:YAG rod (24) provides gain for light at a first wavelength. A combined Q-switch/Brewster plate (26) Q-switches the light to increase its intensity and polarizes the light so that its polarization plane is perpendicular to the Z-axis of a KTP crystal functioning as the optical parametric oscillator, thereby providing type II phase matching conditions. The optical parametric oscillator transforms the light at the first wavelength to light at a second wavelength which is output thorough a partially reflective outcoupler at a wavelength which will not harm the eyes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.