Superlattice surface-normal asymmetric Fabry-Perot reflection modulators: optical modulation and switching

The surface-normal asymmetric Fabry-Perot reflection modulators discussed are based on the electroabsorption stemming from the effective absorption edge blue shift caused by Wannier-Stark localization in superlattices. Due to the modulator's normally off characteristics at the Fabry-Perot reson...

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Bibliographic Details
Published in:IEEE journal of quantum electronics 1993-02, Vol.29 (2), p.727-740
Main Authors: Law, K.-K., Mertz, J.L., Coldren, L.A.
Format: Article
Language:English
Subjects:
Absorption
Fabry-Perot
Optical interconnections
Optical modulation
Optical reflection
Optical resonators
Optical surface waves
Optical waveguides
Resonance
Superlattices
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Summary:The surface-normal asymmetric Fabry-Perot reflection modulators discussed are based on the electroabsorption stemming from the effective absorption edge blue shift caused by Wannier-Stark localization in superlattices. Due to the modulator's normally off characteristics at the Fabry-Perot resonance, they exhibit negative differential photoconductivity. When the modulator is connected to a similar modulator or a simple photodiode, the negative differential photoconductance at resonance enables the modulator to operate as a self-electrooptic effect device (SEED) that shows clear bistable loops, and also has very large on-off ratios at its output. The operating principle of these modulators and SEEDs, and their sensitivity to variations of operating wavelengths, layer thickness and composition, and temperature are discussed.< >
ISSN:0018-9197
1558-1713
DOI:10.1109/3.199325