High modulation rate optical plasmon waveguide modulator

Details High modulation rate optical plasmon waveguide modulator High modulation rate optical plasmon waveguide modulator

1990-03-21

1991-11-26

Lee, John D.

Optical waveguides

Temporal optical modulation within an optical waveguide

Electro-optic

385123, G02B 626

Patent

active

050677888

ABSTRACT:
A high-speed light modulator employing surface plasmon wave coupling comprises a metal-dielectric interface positioned adjacent to and externally of a waveguide carrying totally internally reflected light waves. A high frequency voltage applied to the interface causes the dielectric, in the preferred case an ultra-fast electro-optic polymer, to resonate, generating a surface plasmon wave at the interface. The plasmon wave couples with the evanescent wave portion of the light waves in the waveguide. The output intensity of the light waves varies inversely with the strength of coupling between the light wave and surface plasmon wave modes. The modulator eliminates bulk and alignment problems associated with state of the art modulators and can be employed in integrated optic circuits.

REFERENCES:
patent: 4765705 (1988-08-01), Seymour et al.
patent: 4844613 (1989-07-01), Batchelder et al.
patent: 4877747 (1989-10-01), Stewart
patent: 4915482 (1990-04-01), Collins et al.

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