Phase-engineered III-V MQW Mach-Zehnder modulators

Phase-engineered III-V MQW Mach-Zehnder modulators

We have optimized the negative frequency chirp while maintaining a high extinction ratio in an InP-InGaAsP multiple-quantum-well (MQW) Mach-Zehnder modulator. Our procedure is to elongate one modulator arm such that a /spl pi/ phase shift is produced at zero bias relative to the opposing arm. The re...

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Veröffentlicht in:IEEE photonics technology letters 1996-08, Vol.8 (8), p.1018-1020
Hauptverfasser: Yu, J., Rolland, C., Yevick, D., Somani, A., Bradshaw, S.
Format: Artikel
Sprache:eng
Schlagworte:
Arm
Chirp modulation
Frequency
III-V semiconductor materials
Nonlinear optics
Optical filters
Optical modulation
Phase modulation
Quantum well devices
Voltage
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Zusammenfassung:We have optimized the negative frequency chirp while maintaining a high extinction ratio in an InP-InGaAsP multiple-quantum-well (MQW) Mach-Zehnder modulator. Our procedure is to elongate one modulator arm such that a /spl pi/ phase shift is produced at zero bias relative to the opposing arm. The resulting de extinction ratio is improved to /spl ap/16 dB from 10 dB relative to a symmetric design. The frequency chirp of the modulator at the rising edge is about -3 GHz enabling excellent transmission performance over a 95 km of conventional fiber.
ISSN:1041-1135
1941-0174
DOI:10.1109/68.508723