Abstract: An integrated optical waveguide (1) having an in-line light sensor (2) integrally formed therewith for tapping off a small proportion of the signal transmitted along the waveguide (1). A first part (1A) of the waveguide leads to a photodiode portion (2) and a second part (1B) of the waveguide leads away from the photodiode portion (2), the photodiode portion (2) comprising one or more regions (14) of light absorbing material within the waveguide (1) arranged to absorb a minor proportion of light transmitted along the waveguide (1) and thereby to generate free charge carriers within the waveguide (1). Deep band gap levels (21) are introduced into photodiode portion by ion implantation to enable it to absorb selected wavelengths. The free charge carriers are detected by a p-i-n diode formed across the waveguide (1). Wavelength selective reflectors (11, 12) may be provided either side of the photodiode portion (2) so light passes repeatedly through the photodiode portion (2).

Abstract: A stimulator for use in marital orgasmic and sexual therapy for performing a simulation of cunnilingus is provided. The stimulator has an elongated cylindrical housing, simulated lips, a simulated tongue and is battery powered. The tongue is caused to move in and out with respect to the simulated lips; up and down; and side to side. These motions are attainable independently of the others. Three motors, separate switches, and three sets of cooperating but independent linkage are provided to accomplish this motion arrangement. A finger operated plunger type dispenser integral to the housing dispenses lubricant, medication, or other fluid onto the simulated tongue.