Coincidence detection of inharmonic pulses in a nonlinear crystal

Details Coincidence detection of inharmonic pulses in a nonlinear crystal Coincidence detection of inharmonic pulses in a nonlinear crystal

2006-07-27

arxiv.org/abs/cond-mat/0607723v1

Physics

Condensed Matter

Other Condensed Matter

4 pages, 6 figures

Scientific paper

10.1103/PhysRevE.75.012902

Two trains of light pulses at periods that are equally shifted from the harmonics of a missing fundamental, are combined in a nonlinear crystal. As a result of a noncollinear phase matched second order nonlinear generation, a new train of pulses is obtained. When the temporal width of the input pulses is large, the frequency of the resulting pulse train follows the observations from classical experiments on the perception of virtual pitch by the brain. On the other hand, when the width of the input pulses is small, the generated pulse train exhibits much lower frequencies, analogous to those observed in the motor neural system. Our experimental set up allows us to explore, systematically and continuously, the transition between these two regimes, while at the same time demonstrate that coincidence detection in quadratic nonlinear systems has functionalities similar to those observed in the nervous system.

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