Patent ID: 7535631
Filing Date: 2009-05-19
Classification: G02B

Abstract:
1. A method comprising: providing a plurality of laser devices each including one or more fiber gain media, wherein each of the plurality of laser devices includes a laser cavity, and wherein the plurality of laser devices includes a first laser device that emits a first laser beam at a first characteristic wavelength having a full-width half maximum (FWHM) linewidth of at most 1 nm and a second laser device that emits a second laser beam at a second characteristic wavelength having an FWHM linewidth of at most 1 nm; providing one or more high-efficiency dielectric diffractive gratings optically coupled to receive the first and second laser beams, wherein the one or more high-efficiency dielectric diffractive gratings are located outside the laser cavities of the plurality of laser devices; and spectrally combining the first and second laser beams into a single output beam using the one or more high-efficiency dielectric diffractive gratings.