Abstract
A design procedure is given for multiple resonance FTR filters which are required to be nonpolarizing for a specific wavelength and angle of incidence. The optimum thickness of the buffer layer is derived to make the phase velocities of TE and TM modes coincide in a twin-waveguide system. With numerical examples and discussion, it is shown that the condition for zero dispersion of coupled modes of a polarization wave can extend to nonpolarizing coupled modes.
© 1984 Optical Society of America
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