Abstract: A channel waveguide structure comprises a substrate, a channel pattern defined in the substrate adjacent the top surface of the substrate, and a planar film layer on top substrate. The channel pattern comprises channels having a high index of refraction, while the film layer is made from a nonlinear organic material. In a preferred embodiment, the substrate is glass and the channel pattern comprises ion-exchanged channels. In this preferred embodiment, the nonlinear organic material is a soluble polydiacetylene, such as poly(3BCMU), poly(4BCMU), or poly(TS12). The thicknesses of the ion-exchanged channels and of the film layer can be adjusted so that the channel waveguide structure functions as a single mode waveguide for light having a wavelength in the range of 1.3 to 1.67 microns.

Abstract: This is a device that enables one to control the translation and rotation of an element relative to a light beam. The device has a rotatable member having a plurality of position-identifying circumferentially spaced openings therein as well as an aperture for the transmission of a light beam. The rotatable member is associated with translation means and rotating means. In a preferred embodiment the rotatable member is remotely controlled with a computer.