Patent ID: 6370180
Filing Date: 2002-04-09
Classification: H01S

Abstract:
An optical waveguide device comprising:a first laser for outputting a quasi-four-level emission centered about a quasi-four-level wavelength of 946 nm below a suppressed four-level wavelength centered about 1060 nm, the first laser having a pump beam area and a laser beam area to provide a pump-signal overlap ratio of the pump beam area/the laser beam area of about one which is necessary for efficient quasi-four-level operation; and a second laser for outputting a three-level emission centered about a three-level wavelength of 980 nm below a suppressed quasi-four-level wavelength centered about 1030 nm, the second laser having a single cladding, the second laser having an input end and an output end, said input end is optically coupled to said first laser such that said quasi-four-level emission outputted from said first laser is inputted as a pump beam into said second laser input end and the three-level emission is outputted from said second laser output end.