A natural framework for evaluating prism-coupler performance is provided by a recently developed geometrical construction in which refraction through a prism for an arbitrary angle of incidence is represented by an ellipse. The useful operating range of a prism coupler is represented by the portion of the representational ellipse that appears within a window determined by the mode propagation conditions of a thin-film–substrate system.
© 1983 Optical Society of America
Original Manuscript: March 14, 1983
Published: August 1, 1983
Albert Feldman, "Graphical representation of prism coupling into thin films," Appl. Opt. 22, 2380-2382 (1983)