Wavelength converting optical device
US5377291A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 1989 |
| Grant date | Dec 27, 1994 |
| Priority date | — |
| Expiry date | Dec 15, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/383
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A wavelength converting optical device includes an optical waveguide which has a waveguide portion and a cladding portion, at least one of which is formed of a nonlinear optical material. A fundamental wave, incident on the waveguide portion from an input end face of the waveguide, is converted into an optical second harmonic wave by Cerenkov radiation and is radiated into the cladding portion. The radiated second harmonic wave is output from an output end face of the waveguide. A reflecting film is provided on the emerging end face of the waveguide. The reflecting film includes a high reflectivity with respect to the fundamental wave of a guide mode and a low reflectivity with respect to the optical second harmonic wave. A wave front converting element is arranged to oppose the reflecting film. The converting element has a diffraction grating for converting the second harmonic wave, emerging from the output end face of the waveguide, into a plane wave.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.