Optical resonators containing tilted birefringent plates as tuning devices have
been studied on the assumption that the resonator modes are eigenfunctions of an
assembly of retardation plates interspersed with partial polarizers. The
bandwidth is narrower than that of an equivalent filter using perfect
polarizers, but the extinction coefficient does not go to zero. Stacks of plates
whose thicknesses are in integer ratios have bandwidths much narrower than those
of equivalent Lyot filters, but the secondary maxima do not correspond to those
of Lyot filters. Application to the organic-dye laser is discussed. A device
analogous to the Šolc filter is also considered.
© 1974 Optical Society of America
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