Large-mode-area, multimode, hybrid optical fibers and...

Details Large-mode-area, multimode, hybrid optical fibers and... Large-mode-area, multimode, hybrid optical fibers and...

2007-06-04

2008-11-25

Font, Frank G (Department: 2883)

Optical waveguides

Optical fiber waveguide with cladding

C385S124000, C385S125000, C385S126000, C385S127000, C385S128000

Reexamination Certificate

active

07457500

ABSTRACT:
A large mode area optical fiber is configured to support multiple transverse modes of signal radiation within its core region. The fiber is a hybrid design that includes at least two axial segments having different characteristics. In a first axial segment the transverse refractive index profile inside the core is not radially uniform being characterized by a radial dip in refractive index. The first segment supports more than one transverse mode. In a second axial segment the transverse refractive index profile inside the core is more uniform than that of the first segment. The two segments are adiabatically coupled to one another. Illustratively, the second segment is a terminal portion of the fiber which facilitates coupling to other components. In one embodiment, in the first segment M12>1.0, and in the second segment M22<<M12. In a preferred embodiment, M12>>1.0 and M22˜1.0. In another embodiment, the optical fiber is coupled to a fiber stub.

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