Two-mode photonic crystal fiber and applications thereof

Details Two-mode photonic crystal fiber and applications thereof Two-mode photonic crystal fiber and applications thereof

2007-03-13

2007-03-13

Wood, Kevin S. (Department: 2874)

Optical waveguides

Optical fiber waveguide with cladding

Utilizing nonsolid core or cladding

Reexamination Certificate

active

10976185

ABSTRACT:
A two-mode photonic crystal fiber includes a core of a substantially transparent core material. The core material has a core refractive index and a length, and has a core diameter. The fiber also includes a cladding region surrounding the length of core material. The cladding region has a first substantially transparent cladding material, having a first refractive index. The first substantially transparent cladding material has embedded along its length a substantially periodic array of holes, having a diameter, d, and being spaced apart by a pitch, Λ. The holes have a second refractive index, which is less than the first refractive index. The dimensions of the hole diameter, d, and the pitch, Λ, co-operate to give two modes propagation within the photonic crystal fiber independent of input radiation wavelength for any value of the pitch, Λ, for a substantially fixed d/Λ ratio within a range of approximately 0.45–0.65.

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