Pc Photonics Corporation

George G King

Peter K Cheo

A single core or a plurality of cores arranged in rings around a central core , or in an array , are provided with either or both of (a) a modal discrimination characteristic, including gain, index of refraction and cross sectional area, which is greatest in the center of the core or the array, and lowers outwardly therefrom, and (b) an oblong cross section, thereby to provide either or both of (c) a bright laser beam of the fundamental in-phase supermode, and/or (d) a linearly polarized output beam.

Modal discriminating and linearly polarized fiber lasers

Efficient delivery of large amounts of pump laser power distributed along the cladding ( ) of a single core ( ) or multiple core ( ) laser fiber, without degrading the fiber integrity or compromising the fiber's waveguiding property, is accomplished by injecting the power into the cladding via delivery fibers ( ) permanently affixed to a peripheral wall ( ) at an angle that satisfies the condition for total internal reflection of the pump radiation so that it is confined within the inner cladding of the laser fiber. In one embodiment, the laser fiber ( ) is wrapped around a drum (53). Each delivery fiber has a numerical aperture (NA) less than half the NA of the laser fiber, and a core having a refractive index substantially the same as that of the inner cladding ( ) of the laser fiber.

Growing community of inventors

Storrs, CT, United States of America

George G King