Optical fiber fundamental mode field expander

Details Optical fiber fundamental mode field expander Optical fiber fundamental mode field expander

2008-08-13

2009-10-20

Rojas, Omar (Department: 2874)

Optical waveguides

With optical coupler

Particular coupling structure

C385S050000, C385S096000

Reexamination Certificate

active

07606452

ABSTRACT:
A device for providing an expanded mode field from a single mode optical waveguide is formed by fusing a length of single mode optical fiber with a length of fiber rod absent a cladding and adiabatically tapering the fused region. The length of single mode fiber has a core having a refractive index ncoand a cladding having a refractive index ncl, wherein ncl<ncoand wherein the cladding has an outer diameter ρ. The length of fiber rod absent the cladding has a refractive index of the fiber rod is substantially the same as the cladding index nclof the single mode optical fiber. The outer diameter of the length of fiber rod is ρ, the same as the cladding diameter of the single mode fiber.

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