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The equations of two-component electric field assisted ionic diffusion and exchange are formulated analyticallyand solved numerically for the problem of 2-D (cylindrical) microlenses in glass, both for individual, isolated microlenses and arrays of microlenses. The theoretical formulation represents a proposed extension of the 1-D (planar) formulation of Abou el leil and Cooper. Ray tracing through computed index of refraction distributions is used to estimate optical performance. The inclusion of interactions of neighboring microlenses is shown to be important for optimizing optical performance of a high fill factor array.

A hollow-bore ridge waveguide technique for phase locking arrays of coupled CO2 rf excited waveguide lasers was demonstrated. Stable phase-locked operation of two- and three-channel arrays has been demonstrated at the 50 W output level. Preliminary experiments with a five-element array generated an output power of 95 W but phase-locked operation was not conclusively demonstrated.

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A modified hollow-bore ridge waveguide, utilizing a staggered ridge geometry, has been used successfully to obtain single-frequency operation from an array of CO2 waveguide lasers. The gain volume of the array is equivalent to six waveguide lasers of 37 cm length and 2.25×2.25 mm2 cross section. The output power from the sealed-off device reached 68 W cw. Stable single-frequency operation in the antisymmetric supermode was observed.