Solid state laser generating UV radiation for writing fiber bragg gratings
US6701044B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 10, 2001 |
| Grant date | Mar 2, 2004 |
| Priority date | — |
| Expiry date | Apr 25, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/1618
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A system employing a solid state light source for writing Bragg gratings in fibers and for other photolithographic applications. The solid state light source preferably has a passively Q-switched laser, a fiber amplifier and two or more nonlinear conversion elements for delivering a pulsed exposure beam at an exposure wavelength in the UV wavelength range. The exposure beam is generated in a single pass through the nonlinear elements, for example by cascaded second harmonic generation yielding the fourth harmonic. The system is effective at covering the UV wavelengths from 200 nm to 330 nm and particularly effective at producing an exposure wavelength between 240 and 250 nm at average power levels of 500 milliWatts and more within a photosensitive range of fiber cores in which Bragg gratings are to be written.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.