Abstract

Phase-locking of two slow-flow CO₂-lasers, each providing an output power of 20 W, has been investigated. The active media are situated in parallel in a distance of 55 cm to each other. Both resonators are folded twice by plane mirrors to make the two beams propagate in parallel close to each other. The laser radiation is extracted by a common semitransparent output coupler. As only reflective optics is used (except for the output coupler) this concept is also suitable for high power lasers. When the segmented folding mirror is replaced by a parabolic mirror more than two lasers can be coupled.

© 1994 IEEE