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This paper investigated absorption recovery in a 5-layer, p-i-n InAs quantum dot modulator that was 1.1 mm long and having a 6 μm ridge waveguide. The change in transmission of a weak probe optical pulse, induced by an intense pump pulse, has been measured as a function of time delay. The 250 fs pump and probe pulses are degenerate in wavelength with the transition at 1.3 μm of the QD ground state...
Optical transmission measurements are reported in the 1.3-mum region in an InAs quantum-dot (QD) waveguide modulator using a supercontinuum generator. A quantum-confined Stark shift of 15 nm was demonstrated in a five-layer QD stack with a field of 270 KV/cm. The electrically induced change in absorption has been measured and the change in refractive index (up to 0.001) has been estimated via the...
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