Abstract

We present the results of an experimental study of phase locking counterrotating modes in a Rhodamine-6G continuous-wave broadband ring dye laser. Results for the measured mutual coherence of the counterrotating fields are presented for three different coupling geometries: namely, coupling by using an intracavity retroreflector, a single extracavity retroreflector placed in one of the output beams, and extracavity retroreflectors placed in each of the two output beams. We find that the highest degree of locking is obtained for the case of the intracavity retroreflector and leads to counterrotating outputs with a measured mutual coherence of unity.

© 1992 Optical Society of America

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