Yokohama National University, Department of Electrical and Computer Engineering
Yokohama National University, Department of Electrical and Computer Engineering
Yokohama National University, Department of Electrical and Computer Engineering
Yokohama National University, Department of Electrical and Computer Engineering
Yokohama National University, Department of Electrical and Computer Engineering
抄録
This paper reports two advances in a slow light device consisting of chirped photonic crystal slab coupled waveguide on SOI substrate. One is concerning the delay-bandwidth product, indicating the buffering capacity of the device. We experimentally evaluated a record high value of 57 (a 40ps delay and a 1.4THz bandwidth). We also observed ~1ps wide optical pulse transmission in the cross-correlation measurement. Regarding the pulse as a signal and considering the broadening of the pulse width due to the imperfect dispersion compensation in the device, storage of more than 12 signal bits was confirmed. The other is a wide-range tuning of the pulse delay. We propose a technique for externally controlling the chirping to permit variable delay. We demonstrate tuning of the pulse delay up to 23ps, corresponding to a ~7mm extension of the free space length.
Large delay-bandwidth product and tuning of slow light pulse in photonic crystal coupled waveguide
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