Patent ID: 6944192
Filing Date: 2005-09-13
Classification: G02B,H01S

Abstract:
1. An optical device, comprising: a broad area laser for lasing at a first wavelength; a multimode active-doped tapered waveguide laser having a first section having an input cross section having the same shape as an output cross section, the first section having an optically-active core cross section at an input end and at an output end for lasing at a second wavelength with an actively doped ion, and a second section having an input cross section being different from an output section, the second section tapering from the first section core cross section to a smaller output core cross section, wherein the multimode active-doped tapered waveguide laser has a multimode input reflector coupled to the input end of the first section before the second section, the multimode input reflector provides about 99% reflectivity for reflecting the fundamental-mode lasing output of the second wavelength, wherein the multimode active-doped tapered waveguide laser has a multimode output reflector coupled to the output end of the first section, the multimode output reflector provides about 99% reflectivity for reflecting about 99% of the first wavelength; and a multimode passive planar mode transformer coupling and tapering from the broad area laser to the multimode active-doped tapered waveguide laser.