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Empty Unstable Resonator Misalignment Effects And Their Sensitivity To Resonator Magnification

We have previously investigated effects of misalignment in empty unstable strip resonators for various ranges of equivalent Fresnel number, Feq, for a fixed value of magnification, M, of 2.0. When Feq is fixed near N + 3/8 and the misalignment parameter ε is allowed to vary, the power retention ratio PR is quasi-oscillatory and behaves poorly for certain values of ε, including fairly small misalignments such as could readily occur inadvertently. The present work extends misalignment investigations to a variety of values of magnification, including 1.6, 1.8, 2.0, 2.2, and 2.5. The same qualitative conclusions apply for all values of magnification, but the magnitude of the variations in PR as a function of 6 becomes less pronounced as magnification is increased.