Patent ID: 6014389
Filing Date: 2000-01-11
Classification: H01S

Abstract:
Apparatus for generating continuous-wave laser light in the blue region of the visible spectrum, which comprises:at least a first and a second laser diode;said at least a first laser diode being effective for emitting a first light emission at a wavelength of substantially 790 nm;said at least a second laser diode being effective for emitting a second light emission at a wavelength in a range from 1000 to 1160 nm;apparatus for coupling said first and said second light emissions in a first fiber effective for transmitting said first and said second light emissions;said first fiber being undoped;apparatus for coupling said first fiber to a second fiber;said second fiber having a first and a second end;said second fiber being doped with a rare-earth ion effective for causing a third light emission at a wavelength in the range from 400 to 500 nm;a first reflecting element being effective for reflecting said third light emission and for transmitting any other light emission;said first reflecting element being positioned at said first end of said second fiber;a second reflecting element being positioned at said second end of said second fiber;said first and said second reflecting element forming an optical cavity within said second fiber; andsaid second reflecting element being effective for transmitting at least ten percent and reflecting the remainder of said third light emission.