Method and apparatus for increasing the intensity of an eye safe laser
US6898218B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 28, 2003 |
| Grant date | May 24, 2005 |
| Priority date | — |
| Expiry date | Apr 28, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/39
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A higher intensity eye safe laser is provided for long range target designation or illumination as well as long range eye safe communications by providing a single beam line combination of an optical parametric oscillator and optical parametric amplifier which are used to double the output of the optical parametric oscillator while limiting beam spread to less than 1.2 milliradians assuming a 20 mm clear aperture. The OPO/OPA combination requires no conditioning, isolation or synchronization optics and provides a factor of two improvements in beam quality as compared to an equivalent optical parametric oscillator, with the subject system providing a compact robust configuration. The high conversion is provided by the use of a simple optical parametric oscillator seeding an optical parametric amplifier without double passing the pump pulse in the optical parametric oscillator. Low beam divergence operation is provided with minimum optics in a compact space with the optical parametric oscillator operating at a reduced signal intercavity flux which provides increased damaged threshold margins.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.