Computational investigations were made of the power loss (output coupling) of misaligned strip unstable resonators as a function of the equivalent Fresnel number for several values of the misalignment parameter in a domain where cusping occurs. The behavior of power loss was found to agree with predictions based on consideration of a separate value of equivalent Fresnel number associated with each side of the resonator axis. Effects of even small misalignments can be quite pronounced.
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Perkins et al. (1984) studied this question.
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