Observation of low-chirp modulation in InGaAs-InAlAs multiple-quantum-well optical modulators under 30 GHz

Modulated light spectra were measured in long-wavelength InGaAs-InAlAs multiple-quantum-well intensity modulators under 30-GHz large-signal modulations. The linewidth broadening factor alpha is determined from the relation between the intensity modulation index and the sideband strength relative to...

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Published inIEEE photonics technology letters Vol. 3; no. 2; pp. 138 - 140
Main Authors Wakita, K., Kotaka, I., Mitomi, O., Asai, H., Kawamura, Y.
Format Journal Article
LanguageEnglish
Published IEEE 01.02.1991
Subjects
Capacitance
Chirp modulation
Frequency
High speed optical techniques
Indium compounds
Indium gallium arsenide
Intensity modulation
Optical fiber communication
Optical modulation
Quantum well devices
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Summary:Modulated light spectra were measured in long-wavelength InGaAs-InAlAs multiple-quantum-well intensity modulators under 30-GHz large-signal modulations. The linewidth broadening factor alpha is determined from the relation between the intensity modulation index and the sideband strength relative to the carrier. The minimum alpha value is estimated to be 0.70 at 1.54 mu m, which is almost the same as the lowest value so far reported in a bulk Franz-Keldysh modulator. This is significantly lower than what is obtained from direct-intensity modulation of injection lasers, making this a useful device for application to high-bit-rate long-haul optical communication systems.< >
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:1041-1135
1941-0174
DOI:10.1109/68.76867