Title: Variable optical coupler

Abstract: This invention relates to an optical waveguide switch and directional coupler providing variable coupling between two optical fibers. The coupler is fabricated in semiconductive material such as GaAs or GaAlAs. A double heterostructure is used having a higher index of refraction middle layer. Optical fibers are inserted in channels in the semiconductive material. Varying the reverse bias across the heterostructure junctions located in the material between the channels electrically changes the refractive index of the material and alters the coupling between the fibers. The device is applicable to switching in optical communication systems.

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Inventors: Thompson, George H. B. (Harlow, EN)

Application Number: 594480
Filing Date: 1975-07-09
Publication_date: 1976-08-24
Assignee: International Standard Electric Corporation (New York, NY)
Primary Class(es): 385/41 385/16, 385/132
Other Classes:
US Patent Ref:

3760297	Sep, 1973	Thompson	350/96.
3883219	May, 1975	Logan et al.	350/96.

Other Refs:
Primary Examiner: Corbin, John K.
Assistant Examiner: Levy, Stewart
Attorney: O'Halloran; John T., Van Der Sluys; Peter C., Ingrassia; Vincent