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New design of InGaAs-InGaAlAs MQW electroabsorption modulator for high-speed all-optical wavelength conversion

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8 Author(s)
Dahdah, N.E. ; Lab. of Photonics & Nanostruct., CNRS, Marcoussis, France ; Decobert, J. ; Shen, A. ; Bouchoule, S.
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We have optimized the structure of InGaAlAs multiple quantum-well electroabsorption modulators for all-optical signal processing. As wavelength conversion is a key function for all-optical telecommunication network, we have based our optimization upon the main parameters of this function, namely, polarization insensitivity, exciton saturation, and photogenerated carrier sweep-out time. Four samples have been studied with different well tensile strain and barrier height. We find low polarization dependence over a range of applied bias. Less than 10-ps absorption-saturation recovery time at lower biases and smaller saturation power than in the literature are reported.

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Photonics Technology Letters, IEEE  (Volume:16 ,  Issue: 10 )