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A Distributed Feedback Evanescent Dye Laser in a Slab-Type Optical Waveguide

Distributed feedback (DFB) oscillation from a thin-film waveguiding evanescent dye laser was observed. Tunable narrow-linewidth oscillations of only the TE0 or TM0 modes were obtained by using a single-mode glass waveguide with a rectangular Rhodamine-6G activated polyurethane film. The experimental results were in good agreement with the results of the theoretical analysis.