Nonlinearity induced ultrafast slow-light tuning in photonic crystal waveguide

Keisuke Kondo; Mizuki Shinkawa; Yohei Hamachi; Yuji Saito; Yoshiki Arita; Toshihiko Baba

doi:10.1117/12.2003760

6 March 2013 Nonlinearity induced ultrafast slow-light tuning in photonic crystal waveguide

Keisuke Kondo, Mizuki Shinkawa, Yohei Hamachi, Yuji Saito, Yoshiki Arita, Toshihiko Baba

Proceedings Volume 8636, Advances in Slow and Fast Light VI; 86360Z (2013) https://doi.org/10.1117/12.2003760
Event: SPIE OPTO, 2013, San Francisco, California, United States

Abstract

We demonstrated ultrafast delay tuning of slow-light pulse with a response time < 10 ps. This is achieved using two types of slow light: dispersion-compensated slow light for the signal pulse; and low-dispersion slow light to enhance the nonlinear effect of the control pulse. These two slow light are generated simultaneously in lattice-shifted photonic crystal waveguides, arising from flat and straight sections of the photonic band, respectively. The control pulse blue-shifts the signal pulse spectrum, through dynamic tuning and cross-phase modulation caused by the plasma effect of two-photonabsorption carriers. This changes the delay by up to 10 ps only when the two pulses overlap within the waveguide, and enables an ultrafast tuning that is not limited by the carrier lifetime. Using this, we succeeded in the delay tuning of one target pulse within a pulse train with 12 ps intervals.

Citation Download Citation

Keisuke Kondo, Mizuki Shinkawa, Yohei Hamachi, Yuji Saito, Yoshiki Arita, and Toshihiko Baba "Nonlinearity induced ultrafast slow-light tuning in photonic crystal waveguide", Proc. SPIE 8636, Advances in Slow and Fast Light VI, 86360Z (6 March 2013); https://doi.org/10.1117/12.2003760

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