All-Optical Reshaping/Retiming Operation of Intersubband Absorption Switch Using InGaAs/AlAs/AlAsSb Coupled Quantum Wells

We demonstrate an all-optical pulse reshaping and retiming operation using intersubband absorption in InGaAs/AlAs/AlAsSb coupled quantum wells. The pulse width reduction from 1ps to 300fs and the precise timing synchronization with a control pulse was achieved.