Coupling to optical waveguide modes was investigated by depositing two thin film layers on the hypotenuse of a rutile prism. Coupling efficiency was determined as a function of input beam angle for the three lowest order TE and TM modes. The coupling lineshape was found to agree with the predictions of a lossless, ray-optics analysis for all but the lowest order TM modes. This result is explained in terms of the relative effects of loss on the coupling efficiencies of the various modes.
© 1974 Optical Society of America
Original Manuscript: January 30, 1974
Published: November 1, 1974
T. A. Galantowicz, "Lineshape Measurement for Coupling to Waveguide Modes in the Prism–Film Coupler," Appl. Opt. 13, 2525-2528 (1974)