Slow and fast light in quantum dot based semiconductor optical amplifiers |
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| Institution: | 1. CNRS – laboratoire de photonique et de nanostructures, route de Nozay, 91460 Marcoussis, France;2. Alcatel–Thales III–V Lab, Joint lab of “Bell Labs” and “Thales Research and Technology”, route de Nozay, 91461 Marcoussis cedex, France |
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| Abstract: | Recent progress in the field of quantum dot/dash based semiconductor optical amplifiers (SOAs) for slow and fast light is discussed. Room temperature fast light has been obtained in InAs/InP QDash based SOAs by means of coherent population oscillation and four wave mixing (FWM) effects. Typical optical delays amount to 55 ps at 2 GHz. Growth optimization of the QDashes allowed us to achieve high modal gain, leading to very similar performances, e.g. gain and FWM efficiency, to those of a bulk SOA. A novel approach based on linear spectrograms is also introduced to measure the phase shift induced by wave mixing in an SOA. |
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