Abstract

An experiment was performed using two cw Ar-ion lasers in Fabry-Perot resonators configured in a U-shaped cavity and coupled through a common end mirror to examine the effect of coupling strength on phase locking. The near field fringe visibilities were measured while varying the reflectivity of the common end mirror from 10 to 90%. The total multiline and single line visibilities during multiline coupling along with the visibility during single line coupling were measured. The optimal coupling strength for phase-locked operation for the Ar-ion lasers used in this experiment was found to be ~25%.

© 1990 Optical Society of America

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