Patent ID: 7418836
Filing Date: 2008-09-02
Classification: C03B,G01N,G02B

Abstract:
1. A method of manufacturing a photonic bandgap fiber, said method comprising: arranging a plurality of tubes so as to form a plurality of rings of tubes disposed about a center; excluding at least three rings of tubes from said center to provide an open region; and stretching said plurality of tubes thereby reducing the size of said rings and said open region so as to form a photonic bandgap fiber comprising a core and a cladding disposed about said core, wherein said cladding includes a first plurality of ring shaped regions comprising a high refractive index material and a second plurality of ring shaped regions comprising a low refractive index material, wherein said first plurality of ring shaped regions has an average thickness, d, and an average periodicity, Λ, and said average thickness, d, of said high index material is limited such that the ratio d/Λ is less than approximately 0.2, and wherein said excluding and stretching affect an optical characteristic of said photonic bandgap fiber at a design wavelength.