We report phase-locked operation of two carbon dioxide waveguide lasers induced by a process of four-wave mixing in an intracavity region where the two gain media intersect at an angle of 78 mrad. Mutually coherent output from the two lasers is observed with a locking range of 0.4 MHz, in agreement with estimates based on the gain saturation nonlinearity. © 1992.
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|Published - 1 Jun 1992