All-optical planar modulator structure with channel waveguides

Details All-optical planar modulator structure with channel waveguides All-optical planar modulator structure with channel waveguides

1989-08-25

1990-07-17

Sikes, William L.

350354, G02B 610

Patent

active

049417258

ABSTRACT:
All optical modulators are disclosed which include a channel waveguide made of an optically nonlinear material and transmitting an infrared beam. A control light whose wavelength is shorter than the bandgap energy of the channel of the guide is directed to the guide to bring it to cutoff. Near 100% modulation was obtained for a silicon waveguide with less than 150 pJ with a subnanosecond initiation and recovery time in a three port, fiber optics, geometry suitable for use as a logic gate. The operation is largely wavelength independent and stable. Planar multiple optical modulator structures are also disclosed as further embodiments.

REFERENCES:
patent: 4626075 (1986-12-01), Chemla
patent: 4693547 (1987-09-01), Soref et al.
patent: 4716449 (1987-12-01), Miller
patent: 4867515 (1989-09-01), Normandin

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