Showing papers by "Er'el Granot published in 2008"
Patent•
14 Nov 2008
TL;DR: In this article, the authors proposed a method to determine the DGD of the optical line by measuring a relative change in spectral intensity near a clock frequency while varying the optical signal between a first state of polarization and a second state of polarisation.
Abstract: In one exemplary embodiment, a method comprises transmitting an optical signal via the optical line, measuring a relative change in spectral intensity of the optical signal near a clock frequency (or half of that frequency) while varying a polarization of the optical signal between a first state of polarization and a second state of polarization, and using the relative change in spectral intensity of the optical signal to determine and correct the DGD of the optical line Another method comprises splitting an optical signal traveling through the optical line into a first and second portions having a first and second principal states of polarization of the optical line, converting the first and second portions into a first and second electrical signals, delaying the second electrical signal to create a delayed electrical signal that compensates for a DGD of the optical line, and combining the delayed electrical signal with the first electrical signal to produce a fixed output electrical signal
14 citations
TL;DR: In this paper, the authors apply the multiply subtractive Kramers-Kronig (MSKK) method to the derivative of a medium's optical transfer function and obtain a method that integrates two different techniques, MSKK and spectral ballistic imaging, without the need to measure the phases at all but rather its derivative.
Abstract: We apply the multiply subtractive Kramers-Kronig (MSKK) method to the derivative of a medium's optical transfer function. That is, the phase “difference” or derivative Δθ (instead of the phase) can be evaluated from the measurements of the relative derivative of the intensity Δln[I(ω)]=ΔI(ω)/I(ω) with the aid of a few Δθ measurements. As a result, we obtain a method that integrates two different techniques, MSKK and spectral ballistic imaging. We show that the transfer function can be evaluated with great accuracy without the need to measure the phases at all but rather its derivative, which is a much simpler process.
7 citations
TL;DR: In this article, the authors describe the dynamics of a bound state of an attractive δ-delta-well under displacement of the potential, and show that only a fraction of the initially confined wavefunction remains confined to the moving potential.
Abstract: We describe the dynamics of a bound state of an attractive $\delta$-well under displacement of the potential. Exact analytical results are presented for the suddenly moved potential. Since this is a quantum system, only a fraction of the initially confined wavefunction remains confined to the moving potential. However, it is shown that besides the probability to remain confined to the moving barrier and the probability to remain in the initial position, there is also a certain probability for the particle to move at double speed. A quasi-classical interpretation for this effect is suggested. The temporal and spectral dynamics of each one of the scenarios is investigated.
2 citations
Posted Content•
TL;DR: In this article, the Schrodinger equation of a diffusive medium is derived from the Fourier law and the diffusion equation, which can be easily generalized to demonstrate the transition from any random wave equation to the diffusive equation.
Abstract: The Fourier law and the diffusion equation are derived from the Schrodinger equation of a diffusive medium (consisting of a random potential). The theoretical model is backed by numerical simulation. This derivation can easily be generalized to demonstrate the transition from any random wave equation to the diffusive equation.
1 citations