Patent ID: 6459838
Filing Date: 2002-10-01
Classification: C03B,G02B

Abstract:
A method for making a V-shaped highly birefringent optical fiber, comprising:(a) providing a preform with a substantially circular cross section, wherein the preform comprises a core region and a cladding region adjacent the core, wherein the cladding region has a substantially elliptical cross section; (b) modifying an outer surface of the preform to create a shaped preform with a substantially V-shaped cross section; and (c) drawing the shaped preform at a temperature and draw rate sufficient to provide an optical fiber with the substantially V-shaped cross section of the shaped preform, wherein a major axis of the substantially elliptical cross section of the cladding region is inclined at an angle of: (i) 0Â°; or (ii) 90Â°, with respect to a line bisecting a vertex of the V-shaped cross section of the optical fiber.