All-optical switching of an individual pulse within a sequence of amplified pulses is demonstrated in a conjugated polymer optical amplifier. The switching was achieved using a control pulse resonant with the excited state absorption. An extinction ratio of ∼5.5dB was observed, while the intensities of the remaining pulses in the sequence, spaced at 50ps intervals, were unaffected. A pump-probe study was performed and showed full gain recovery within 2ps.
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Ruseckas et al. (2008) studied this question.
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