Wide bandwidth, low loss photonic bandgap fibers
AssigneeImra America, Inc.
InventorsLiang Dong, Brian K. Thomas, Shigeru Suzuki, Libin Fu
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Abstract
Various embodiments include photonic bandgap fibers (PBGF). Some PBGF embodiments have a hollow core (HC) and may have a square lattice (SQL). In various embodiments, SQL PBGF can have a cladding region including 2-10 layers of air-holes. In various embodiments, an HC SQL PBGF can be configured to provide a relative wavelength transmission window Δλ/λc larger than about 0.35 and a minimum transmission loss in a range from about 70 dB/km to about 0.1 dB/km. In some embodiments, the HC SQL PBGF can be a polarization maintaining fiber. Methods of fabricating PBGF are also disclosed along with some examples of fabricated fibers. Various applications of PBGF are also described.
Claims24
A hollow core photonic bandgap fiber (HC PBGF) for propagating light having a wavelength, λ, said fiber comprising:
- a hollow core;
- and
- a cladding disposed about said core, said cladding comprising a plurality of regions, at least one region having a dimension, Λ, and configured such that the cladding at least partially surrounds a hole having a hole dimension, D,
- wherein said plurality of regions are arranged as a rectangular lattice, and
- wherein D/Λ is in a range from about 0.9 to about 0.995 and said HC PBGF is configured such that a relative wavelength transmission window Δλ/λc is larger than about 0.35.
Dependencies are inferred from the claim text.