Patent ID: 6614974
Filing Date: 2003-09-02
Classification: C03B,G02B,Y02P

Abstract:
An optical fiber, comprising:a core region comprising a first optical fiber material structured to form a first plurality of voids therein, said first plurality of voids occupying a first percentage of a cross-sectional area of said core region; and a cladding region surrounding said core region, said cladding region comprising a second optical fiber material structured to form a second plurality of voids therein, said second plurality of voids occupying a second percentage of a cross-sectional area of said cladding region; wherein said first and second plurality of voids have dimensions substantially smaller than the wavelength of light being used; wherein said optical fiber propagates light by an index guiding effect; and wherein said first and second optical fiber materials and said first and second percentages of cross-sectional area are selected such that an effective index of refraction of said cladding region is less than an effective index of refraction of said core region and within 0.05% thereof.