Hanna, D.C., Sawyers, C.G. and Yuratich, M.A.
Telescopic resonators for large volume TEMoo mode operation
Optical and Quantum Electronics, 13, (6), . (doi:10.1007/BF00668347).
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A stable resonator incorporating a suitably adjusted telescope gives reliable operation of an Nd:YAG laser with a large-volume TEMoo mode. The telescope adjustment is chosen to minimize the effect of focal length variations in the laser rod and at the same time ensures the optimum mode-selection properties of a confocal resonator. Simple approximations applied to the ray transfer matrices allow a detailed analysis of the resonator to be performed. This analysis yields simple design equations relating the mode spot sizes, resonator length, telescope magnification and defocusing, and diffraction losses. Experimental results show excellent agreement with the results of this analysis.
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