초록 ▼

A polarization locked optical fiber having a fiber core suspended by a thin cladding web within a tube with a prestress acting along the web to fixedly polarize the core. Preferably, the tube and web are glass materials having different thermal characteristics to provide a built-in stress upon drawi

A polarization locked optical fiber having a fiber core suspended by a thin cladding web within a tube with a prestress acting along the web to fixedly polarize the core. Preferably, the tube and web are glass materials having different thermal characteristics to provide a built-in stress upon drawing of the web and tube assembly. In the preferred method, an optical fiber preform is machined to a rectangular form and drawn within an enclosing tube to provide the stressed web arrangement.

대표청구항 ▼

A single-mode optical waveguide comprising a longitudinally extending hollow tubular member, at least one rigid web transversely bridging the inside of said tubular member and extending longitudinally therealong, a core of light transmitting material mounted in said web and extending longitudinally

A single-mode optical waveguide comprising a longitudinally extending hollow tubular member, at least one rigid web transversely bridging the inside of said tubular member and extending longitudinally therealong, a core of light transmitting material mounted in said web and extending longitudinally therealong with at least portions of said web adjoining said core having an index of refraction lower than that of said core to enhance single-mode propagation therein, said waveguide having physical characteristics establishing a stress along the bridging direction of said web for exerting an anisotropic force radially on said core along said web direction to effect a polarization locked characteristic within said waveguide since external forces on said waveguide must be resolved generally along said web direction.