High-speed all-optical modulation using an InGaAs/AlAsSb quantum well waveguide.
June 27th, 2008 | by admin |High-speed all-optical modulation using an InGaAs/AlAsSb quantum well waveguide.
All-optical cross-phase modulation through the intersubband transition in an InGaAs/AlAsSb coupled quantum well was examined by using a sinusoidal intensity-modulated pump. For probe waves in the wavelength range of 1330-1620 nm and a pump modulation at a repetition rate of 76 GHz, cross-phase modulation (XPM) occurred with an efficiency eta, of 0.653-0.142 rad/W. Based on the efficiency we derived a transfer function for the intersubband transition (ISBT) modulator that can be conveniently used in simulating the characteristics of the modulated output (probe) for long excitation pulses with arbitrary waveforms.
Abedin KS, Lu GW, Miyazaki T, Akimoto R, Ishikawa H.
Photonic Network Group, National Institute of Information and Communications Technology, 4-2-1 Nukui-Kitamachi, Koganei, Tokyo 184-8795, Japan. abedin@nict.go.jp