Tandem resonator reflectance modulator

Details Tandem resonator reflectance modulator Tandem resonator reflectance modulator

1992-08-12

1994-09-06

Look, Edward K.

Optical: systems and elements

Optical modulator

Light wave temporal modulation

359245, 359260, 359263, G02F 121

Patent

active

053453280

ABSTRACT:
A wide band optical modulator is grown on a substrate as tandem Fabry-Perot resonators including three mirrors spaced by two cavities. The absorption of one cavity is changed relative to the absorption of the other cavity by an applied electric field, to cause a change in total reflected light, as light reflecting from the outer mirrors is in phase and light reflecting from the inner mirror is out of phase with light from the outer mirrors.

REFERENCES:
patent: 4790634 (1988-12-01), Miller et al.
patent: 5105301 (1992-04-01), Campi
High-Contrast Reflection Modulation at Normal Incidence in Asymmetric Multiple Quantum Well Fabry-Perot Structure, Elec. Letter, Apr. 27, 1989, vol. 25, No. 9.
Low-Voltage Multiple Quantum Well Reflection Modulator with On:Off Ratio >100:1, Elec. Letters, Jul. 20, 1989, vol. 25, No. 15.
Reflectance Modulator Based on Tandem Fabry-Perot Resonators, I. J. Fritz, J. F. Klem, J. R. Wendt, Appl. Phys. Lett. 59(7), Aug. 12, 1991.
Thin-Film Optical Filters, Second Edition, H. A. Macleod, Macmillan Publish. Co., New York, Adam Hilger Ltd., Bristol.

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