Eigenvalues for unstable resonators with slightly misaligned strip mirrors.

Very small misalignments in unstable strip resonators may cause detachment of the low-loss eigenmode at a lower equivalent Fresnel number N(eq) and introduce different periodicities into the eigenvalue curves as a function of N(eq). Using the resonance equation developed previously from waveguide mode theory, this behavior is explained in physical terms by… CONTINUE READING