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Laser oscillation in an ion-implanted planar Nd:MgO:LiNbO(3) waveguide is demonstrated for the first time to our knowledge. Details of the waveguide structure, spectroscopic properties, photorefractive effects, and laser performance are given. A simple calculation of the absorbed power threshold gives ~8 mW, in fair agreement with the experimental value of ~17 mW.

A detailed description of the use of ion implantation to create optical waveguides in laser crystals is given. Calculated mode profiles and lasing thresholds are shown to be in good agreement with experimental results in a monolithic planar waveguide Nd:YAG laser. The first fabrication and characterization of ion implanted channel waveguides in Nd :YAG is also reported.