Title :
Investigation of InGaAsP Quantum-Well EAM Based Pump-Probe Configuration for Ultrafast Optical Signal Processing
Author :
Wu, Bingbing ; Cheng, Yuanbing ; Fu, Songnian ; Wu, Jian ; Yao, Chen ; Wei, Shile ; Li, Lanlan ; Dai, Yitang ; Shum, Ping
Author_Institution :
Key Lab. of Inf. Photonics & Opt. Commun., Beijing Univ. of Posts & Telecommun., Beijing, China
Abstract :
A comprehensive theoretical model for analyzing both static and dynamic properties of arbitrary composition In1-xGaxAsyP1-y quantum-well (QW) electro-absorption modulator (EAM) is proposed. Optical absorption spectra of the QW-EAM considering both excitonic transitions and continuum conduction-band to valence-band transitions are included to evaluate the QW-EAM static performance. The dynamic absorption recovery of EAM is calculated as a function of electric field and pump power. Then, based on the theory of the carrier and absorption dynamics, a 40 Gb/s pump-probe configuration for optical signal processing using In0.53Ga0.47 As/InP QW-EAM as nonlinear element is thoroughly investigated. Influence of various parameters including pulse width, optical wavelength, optical power, and QW structure on the intensity and phase variation of the output probe signal through nonlinear interactions between pump and probe signals are investigated. The presented model and investigation are suitable for optimizing the device design and describing the properties of In1-xGaxAsyP1-y QW-EAM used in ultrafast optical signal processing applications.
Keywords :
III-V semiconductors; conduction bands; electro-optical modulation; gallium arsenide; indium compounds; optical design techniques; optical information processing; optical pumping; optical saturable absorption; quantum well devices; semiconductor quantum wells; valence bands; visible spectra; In0.53Ga0.47As-InP; arbitrary composition; bit rate 40 Gbit/s; carrier dynamics; continuum conduction-band; dynamic absorption recovery; dynamic properties; excitonic transitions; nonlinear interactions; optical absorption spectra; optical power; optical wavelength; phase variation; pulse width; pump power; pump-probe configuration; quantum-well electroabsorption modulator; static properties; ultrafast optical signal processing; valence-band transitions; Absorption; Electric fields; Optical polarization; Optical pumping; Optical saturation; Probes; Absorption saturation; electro-absorption modulator; pump-probe configuration; signal processing;
Journal_Title :
Quantum Electronics, IEEE Journal of
DOI :
10.1109/JQE.2011.2159483
