Patent ID: 9658402
Date: 2017-05-23
CPC Classifications: G02B,Y10T

Claim:
1. A method for winding an optical fiber, comprising: winding the fiber into a first coil and a second coil, wherein the first coil comprises a first plurality of loops lying in a first planar direction and wherein the second coil comprises a second plurality of loops lying in a second planar direction, wherein the first planar direction and the second planar direction have a orthogonal relationship, wherein the first and second coils have respective bending radii are configured to produce respective bend-induced first and second birefringences, wherein the first birefringence and the second birefringence have respective axes that are rotated with respect to each other in real space by an angle that is equal to 90 degrees, whereby light traveling through the fiber has a state of polarization that evolves in opposite directions as it travels respectively through the first and second coils, and wherein the first and second coils are configured such that light traveling through the fiber acquires opposite phase shifts, respectively, from the first and second coils, such that light traveling through the fiber acquires a first differential group delay from the first coil that is compensated for by a second, opposite differential group delay acquired from the second coil.