All-optical modulator with a channel waveguide

Details All-optical modulator with a channel waveguide All-optical modulator with a channel waveguide

1988-08-05

1989-09-19

Davie, James W.

G02B 610

Patent

active

048675156

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.

REFERENCES:
patent: 4693547 (1987-09-01), Soref et al.
14th Congress of the ICO, "Optics and the Information Age", 1987, pp. 529-532, R. Normandin & D. C. Houghton & M. Simard-Normandin.
Topical Meeting on Integrated and Guided-wave Optics, 1988, Technical Digest Series, vol. 5, pp. 351-354, 1988, Normandin et al.
IEEE Journal of Quantum Electronics, vol. QE-22, No. 6, pp. 873-879, R. A. Soref et al, Jun. 1986.
"Solid State and Semiconductor Physics", J. P. McKelvey, Harper & Row, Publishers, pp. 333-342.

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