Homogenization of far field fiber coupled radiation

摘要

Optical systems and components thereof are disclosed which may be used for efficiently coupling laser energy into an optical conduit while maintaining a homogenous beam output from the optical conduit. Some embodiments are directed more specifically to far field beam homogenization of optical fiber coupled radiation.

主权项

1. An optical system, comprising:
a plurality of linearly spaced emitters configured to generate a respective plurality of substantially parallel equally spaced output beams along output axes of the respective emitters in a symmetrical distribution about a center output axis of a center emitter; a focusing optic operatively coupled to the plurality of emitters and configured to focus a plurality of substantially parallel output beams from the emitters; and an optical conduit comprising a transmitting core which includes an input surface that is operatively coupled to an output axis and focal region of the focusing optic and which includes a longitudinal axis disposed substantially parallel to the center output axis of the center emitter, the input surface comprising an input angle with respect to a plane that is orthogonal to the longitudinal axis of the optical conduit, the input angle lying which licc, substantially in a plane defined by the beams incident on the optical conduit and which includes a magnitude of about
θ1/4(n−1) wherein θ1 is the angle formed between adjacent emitter beam axes of beams between the focusing optic and the input of the optical conduit and n is the index of refraction of the transmitting core and wherein the input angle is configured to substantially homogenize a far field pattern of an output of the optical conduit.