Patent ID: 6894828
Filing Date: 2005-05-17
Classification: H01S

Abstract:
1. An amplifier for a laser beam that has a wavelength (λ), comprising: a multi-mode, self-imaging waveguide having a core comprising a gain or mixing medium with an index of refraction (n) and a core length extending between a core entrance face and a core exit face, said core also having a rectangular cross-section that provides a waveguide width (a), which is large enough to support and propagate multiple modes of the laser beam and a waveguide self-imaging period (WSIP) defined as a distance in the multi-mode waveguide in which a profile or image of the laser beam is periodically re-imaged, wherein WSIP=4na a beam input coupling system capable of providing the profile or image of the laser beam with a TEM a pump light source coupled into the waveguide core medium to propagate pump light energy into the core medium to be extracted by the laser beam.