Quantum well vertical light modulator

Quantum well vertical light modulator

A waveguide modulator is proposed whose operation is based on the dissipative coupling of light from a waveguide into an appropriate quantum-well structure. This approach uses the electric-field-induced change of the refractive index for light modulation. A particular geometrical configuration is nu...

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Veröffentlicht in:IEEE photonics technology letters 1989-04, Vol.1 (4), p.77-79
Hauptverfasser: Chmielowski, M., Langer, D.W.
Format: Artikel
Sprache:eng
Schlagworte:
Electrooptic modulators
High speed optical techniques
Intensity modulation
Optical attenuators
Optical modulation
Optical refraction
Optical variables control
Optical waveguides
Phase modulation
Quantum well devices
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Beschreibung
Zusammenfassung:A waveguide modulator is proposed whose operation is based on the dissipative coupling of light from a waveguide into an appropriate quantum-well structure. This approach uses the electric-field-induced change of the refractive index for light modulation. A particular geometrical configuration is numerically evaluated. The advantages of this configuration are that the combination of high switching speed ( approximately=1 ps), high on/off ratios (e.g. 1/16 dB or 2/25 dB), and low-driving voltage (4 V) could be combined in one device. The proposed modulator exhibits negligible phase shifts when the attenuation is smaller than about 10 dB.< >
ISSN:1041-1135
1941-0174
DOI:10.1109/68.87908