Patent ID: 7970022

Claim:
An article, comprising: a fiber waveguide extending along a waveguide axis, the fiber waveguide comprising: a core extending along the waveguide axis; and a confinement region surrounding the core, the confinement region being configured to guide radiation at a first wavelength, λ 1 , along the waveguide axis and being configured to transmit at least some of the radiation at a second wavelength, λ 2 , incident on the confinement region along a path, where λ 1 and λ 2 are different, wherein the core comprises a core material selected to interact with radiation at λ 1 to produce radiation at λ 2 and the fiber waveguide is configured to provided stimulated emission of radiation at λ 2 in a direction orthogonal to the waveguide axis when radiation of sufficient power at λ 1 is directed to the core.