Wide tolerance, modulated blue laser source
US4791631A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 1987 |
| Grant date | Dec 13, 1988 |
| Priority date | — |
| Expiry date | Aug 31, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/108
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A process and apparatus are disclosed for producing a beam of coherent radiation at essentially 459 nm by mixing, in a nonlinear crystal consisting essentially of KTP, two laser beams, one at essentially 1064 nm and the other at essentially 808 nm. The 1064 nm radiation is derived from a Nd:YAG laser that consists of an input mirror, an output mirror and a Nd:YAG crystal, and contains also the KTP crystal. The Nd:YAG laser is pumped by an essentially 808 nm semiconductor diode laser beam, which passes through the input mirror and through the KTP crystal into the Nd:YAG laser crystal where it is absorbed. The 1064 nm radiation oscillating inside the Nd:YAG laser resonator is mixed either with the said 808 nm pump beam or with 808 nm radiation provided by a second semiconductor diode laser whose light is coupled with the 1064 nm beam using a beamsplitter. The essentially 459 nm beam passes through the output mirror to a utilization device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.