We show that nonlinear directional couplers with variable coupling coefficients can be used to compose a special kind of switching matrix. The switching matrix can be controlled by the signal itself or by a strong pump. Light routing is realized by adjustment of the power of the signal or the pump. Because light routing is based on the optical Kerr effect, ultrafast routing is possible.

Fast pulse polarity switching is proposed and demonstrated to enhance processing gain in a comb-based radio-frequency photonic phase filter. The polarity switching scheme overcomes previous limits on time bandwidth product and processing gain based on the number of optical frequency comb lines. In an experiment with broadband jamming noise, the peak signal-to-noise ratio of compressed RF output...

Stochastic switching circuits are relay circuits that consist of stochastic switches called pswitches. The study of stochastic switching circuits has widespread applications in many fields of computer science, neuroscience, and biochemistry. In this paper, we discuss several properties of stochastic switching circuits, including robustness, expressibility, and probability approximation. First, ...

We demonstrate efficient all-optical modulation using Rb vapor confined to a hollow-core photonic bandgap fiber. The intensity of a signal field participating in the four-wave-mixing process is modulated using a weak switching field. We observe 3 dB of attenuation in the signal field with only 3600 photons of switching energy, corresponding to 23 photons per atomic cross section lambda(2)/(2pi)...

We introduce a novel device for optical switching by using the position shift of the spatial soliton after collision. The device is a one-to-three switching device controlled by two control beams. For the optimum signal power, the transmission efficiency is above 95%. The wave propagation in the structure and the transmission efficiency as a function of input signal power are shown and discussed.

We present the first comprehensive study of the large-signal switching characteristics of an AlGaAs/InGaAs modulation-doped field-effect transistor on a picosecond time scale. Electra-optic sampling is used to measure drain voltage response to a steplike gate input with a 2.8 ps rise time, at various dc biases. A large-signal switching time of 6.2 ps is obtained. Features deleterious to high-fr...

In this paper, we propose a modeling approach that captures the dependence of the power dissipation of a (combinational or sequential) logic circuit on its input/output signal switching statistics. The resulting power macromodel, consists of a quadratic or cubic equation in four variables, that can be used to estimate the power consumed in the circuit for any given input/output signal statistic...

In order to transfer voice or some other application requiring real-time delivery over a packet network, we need a de-jitter buffer to eliminate delay jitters. An important design parameter is the depth of the de-jitter buffer since it influences two important parameters controlling voice quality, namely voice-path delay and packet loss probability. In this paper, we propose and study several s...

In this paper we introduce the notion of eventually periodic switching signal. We prove that if a family of linear vector fields satisfies a mild finite time controllability condition, and for each initial state there exists a time-dependent switching signal which asymptotically drives the system to the origin (possibly allowing different signals for different initial states), then the same goa...