Experimental demonstration of the intracavity excitation of TE-guided modes

Abstract

The excitation of TE-guided modes in a planar waveguide by the intracavity radiation of a He-Ne laser was experimentally demonstrated. The excitation was performed using a new type of coupling prism of double internal reflection with the input-output faces inclined under the Brewster angle with respect to the intracavity radiation so as to reduce the intracavity reflection losses introduced by the coupling prism. Intracavity reflectance spectra were obtained.