Optical waveguide mode scrambler

An optical waveguide mode scrambler which includes a section of high-alpha optical waveguide optically coupled to a section of low-alpha optical waveguide, the length of the high-alpha waveguide being at least sufficient to provide spatial diffusion of light launched into the waveguide, and the length of low-alpha waveguide being at least sufficient to obtain angular diffusion of light launched into the waveguide.

An optical waveguide mode scrambler which includes at least three optically coupled sections of multimode optical waveguide, including a central section of low-alpha optical waveguide having a length at least sufficient to provide spatial diffusion of light launched therein, and first and second terminal sections of high-alpha optical waveguide spliced, respectively, to first and second ends of said low-alpha optical waveguide, said first and second terminal sections having lengths at least sufficient to provide angular diffusion of light launched therein.

A full-mode light launching assembly for optical waveguide testing which comprises a light source optically coupled to a mode scrambler, wherein the mode scrambler includes a section of high-alpha multimode optical waveguide optically coupled to a section of low-alpha multimode optical waveguide.