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Carrier Dynamics Investigation in a Quantum Cascade Laser using Mid-IR Femtosecond Pulses

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Abstract

In a room temperature 4.5 μm QCL resonantly pumped with fs Mid-IR pulses, we observe an ultrafast gain recovery within the first 200 fs, gain oscillation within the 1 ps and a slower gain recovery of lifetime ~2-3 ps.

© 2011 Optical Society of America

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