期刊
OPTICS EXPRESS
卷 17, 期 4, 页码 2944-2953出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.17.002944
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资金
- Australian Research Council
- Federation Fellow, Centre of Excellence and Discovery
We report nonlinear measurements on 80 mu m silicon photonic crystal waveguides that are designed to support dispersionless slow light with group velocities between c/20 and c/50. By launching picosecond pulses into the waveguides and comparing their output spectral signatures, we show how self phase modulation induced spectral broadening is enhanced due to slow light. Comparison of the measurements and numerical simulations of the pulse propagation elucidates the contribution of the various effects that determine the output pulse shape and the waveguide transfer function. In particular, both experimental and simulated results highlight the significant role of two photon absorption and free carriers in the silicon waveguides and their reinforcement in the slow light regime.. 2009 Optical Society of America
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