Patent ID: 9664869
Date: 2017-05-30
CPC Classifications: G02B,Y10T

Claim:
1. An optical fiber module comprising: an optical fiber having a first end, a second end, and a twisted portion between the first and second ends to enable the optical fiber to provide two orthogonal transverse bending degrees of freedom, wherein the twisted portion induces an optical distortion, wherein a width dimension of the optical fiber in a cross section of the twisted portion at a first point of the twisted portion is substantially orthogonal to the width dimension of the optical fiber in a cross section of the twisted portion at a second point of the twisted portion; a distortion compensation arrangement configured to at least partially compensate for the optical distortion resulting from the twisted portion, the distortion compensation arrangement comprising (i) at least one first cylindrical lens configured to collimate and direct a laser beam towards the twisted portion, (ii) at least one second cylindrical lens configured to apply convergence of beam energy in a slow-axis direction towards the second end, (iii) at least one third cylindrical lens configured to image the laser beam in the slow-axis direction into an output fiber, and (iv) at least one fourth cylindrical lens configured to collimate the laser beam in a fast-axis direction and direct the laser beam into the output fiber; and a housing configured to house at least a portion of the optical fiber including the twisted portion.