Adding Laser Beams: The Best of Both Worlds Technique utilizes both spectral and coherent beam combining

摘要

The combined illumination provided by two automobile headlights is twice that provided by a single headlight. However, it doesn’t work that way with lasers. Even if the lasers are aligned with closely spaced parallel beams — so that the beams essentially overlap in the distance, as automobile headlights do — interference effects among the coherent beams still can cause a drastic reduction in beam quality and also in the power delivered to a target.