Modulators – Amplitude modulator – Nonlinear device controlled by modulating signal
Patent
1975-05-01
1977-09-13
Moskowitz, Nelson
Modulators
Amplitude modulator
Nonlinear device controlled by modulating signal
350 96WG, 350160R, G02B 514, H01S 300
Patent
active
040485919
ABSTRACT:
An integrated optical modulator for modulating optical signals in dielectric wave guides characterized by at least one wave guide being disposed on a surface of a substrate and having an upper surface separated from a second wave guide disposed thereon by a dielectric, low loss film. The substrate supports at least a pair of electrodes on either side of the one wave guide and at least one of the wave guides is of an electro-optical material so that an application of a potential on the electrodes changes the propagation characteristic or constant of the one wave guide. In one embodiment of the invention, only a pair of wave guides are utilized. In another embodiment of the invention, three wave guides are utilized and two of the wave guides are provided in spaced parallel arrangement and are either separated from an upper surface of the third wave guide by the film or are disposed beneath the third wave guide and separated therefrom by the film.
REFERENCES:
patent: 3753157 (1973-08-01), Ash et al.
patent: 3785717 (1974-01-01), Croset et al.
patent: 3822927 (1974-07-01), Zernike
patent: 3850503 (1974-11-01), Riseberg et al.
patent: 3883220 (1975-05-01), Taylor
patent: 3920314 (1975-11-01), Yajima
Auracher et al., "New Directional Coupler for Integrated Optics," 11/74, pp. 4997-4999, J.A.P., vol. 45, No. 11.
Taylor, "Optical Switching and Modulation in Parallel...", 7/73, pp. 3257-3262, J.A.P., vol. 44, No. 7.
Moskowitz Nelson
Siemens Aktiengesellschaft
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