DocumentCode :
791199
Title :
Internal biasing by /spl delta/-doping for low-voltage, high-bandwidth quantum-well optical modulators
Author :
Batty, W. ; Allsopp, D.W.E.
Author_Institution :
Dept. of Electron., York Univ., UK
Volume :
7
Issue :
6
fYear :
1995
fDate :
6/1/1995 12:00:00 AM
Firstpage :
635
Lastpage :
637
Abstract :
Optical intensity modulators must exhibit low-voltage operation, low insertion loss, high contrast ratio and high electrical bandwidth. Electroabsorption calculations for semiconductor quantum wells predict that internal biasing by strategic /spl delta/-doping can produce greatly improved low-voltage operation in waveguide or normal-incidence modulators, for a specified insertion loss and contrast ratio, without compromising electrical bandwidth. Growth of strategically /spl delta/-doped electrorefractive intensity modulators is shown computationally to be insensitive to nonreproducibility in layer growth. Internal biasing by strategic doping is of potential value across the whole range of modulator applications.<>
Keywords :
III-V semiconductors; aluminium compounds; electro-optical modulation; electroabsorption; gallium arsenide; optical losses; optical waveguides; quantum confined Stark effect; semiconductor doping; semiconductor quantum wells; GaAs-AlGaAs; contrast ratio; doping; electrical bandwidth; electroabsorption calculations; electrorefractive intensity modulators; high-bandwidth quantum-well optical modulators; insertion loss; internal biasing; layer growth; low insertion loss; low-voltage operation; modulator applications; normal-incidence modulators; optical intensity modulators; semiconductor quantum wells; strategic doping; waveguide modulators; Bandwidth; Delta modulation; High speed optical techniques; Intensity modulation; Optical interferometry; Optical modulation; Optical refraction; Optical variables control; Optical waveguides; Quantum wells;
fLanguage :
English
Journal_Title :
Photonics Technology Letters, IEEE
Publisher :
ieee
ISSN :
1041-1135
Type :
jour
DOI :
10.1109/68.388748
Filename :
388748
Link To Document :
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