An investigation of phase-locking phenomena in a multichannel, slab-type electrode, CO2 laser array is presented. External and self-phase-locking percentages of 90% and 60%, respectively, have been demonstrated. Azimuthally distributed radial injection within the central region of this gain geometry has been identified as the principal phase-locking mechanism. Fundamental optical modes are initiated simultaneously within each individual discharge slot via injection from this central core-oscillator region.
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Yelden et al. (1993) studied this question.
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