Lawrence Livermore National Security, LLC

Robert P Crist

Jay Walter Dawson

Michael Joseph Messerly

Paul H Pax

Diana Ching Chen

Derrek Reginald Drachenberg

Graham S Allen

Nick Schenkel

Leily Kiani

Matthew J Cook

Victor V Khitrov

Charles Xiao Yu

An all fiber wavelength selective coupler provides wavelength selective transfer of optical energy between two or more separated waveguides. The coupler includes signal cores that are separated enough that they can be fusion spliced to standard fibers as lead-in and lead-out pigtails. A bridge between the signal cores facilitates transfer of the optical energy through a process of evanescent coupling. In one example, the bridge is formed of a series of graded index cores.

Wavelength selective transfer of optical energy

A class of fibers is described that have a non-circular cross section on one or both ends that can by optimized to capture the optical radiation from a laser diode or diode array and deliver the light in the same or different shape on the opposite end of the fiber. A large multimode rectangular waveguide may be provided which can accept the radiation from a high-power diode bar and transform it into a circular cross section on the opposite end, while preserving brightness.

Non-circular optical fiber and mode shape converter and method

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Tracy, CA, United States of America

Robert P Crist