METHOD AND APPARATUS FOR ALIGNING A WAVEGUIDE WITH A RADIATION SOURCE

摘要

A method and apparatus for aligning an optical waveguide 110 with a radiation souce 170 are provided. The waveguide has a longitudinal axis that defines a main optical propagation path. The optical waveguide is illuminated 120 by the radiation source such that the waveguide generates light via photoluminescence, at least a portion of the light generated via photoluminescence being emitted from the waveguide along a direction generally transverse to the longitudinal axis. An output signal 182 is generated at least in part on the basis of light emitted from the waveguide along a direction generally transverse to the longitudinal axis. The alignment of the radiation source and the waveguide is varied at least partly in dependence of the output signal.