Showing papers by "Er'el Granot published in 2009"
Patent•
08 Feb 2009
TL;DR: In this article, a method for determining an phase spectrum of the complex spectral transfer function H(ω) of a medium is presented, which is applied for detecting or imaging an object screened by a scattering medium or for determining a refractive index spectrum of a material.
Abstract: Disclosed is a method for determining an phase spectrum θ(ω) of the complex spectral transfer function H(ω) of a medium. In some embodiments, the method is applied for detecting or imaging an object screened by scattering medium or for determining a refractive index spectrum of a material.
15 citations
TL;DR: A method of achieving cross-gain modulation and slow light using the Brillouin nonlinearity in an optical fiber is introduced and approximatetely 10 m/s group velocity is demonstrated.
Abstract: We introduce a method of achieving cross-gain modulation and slow light using the Brillouin nonlinearity in an optical fiber. We demonstrate approximatetely 10 m/s group velocity using this technique with milliwatts of optical power at room temperature.
12 citations
TL;DR: In this article, the dynamics of a bound state of an attractive δ-well under displacement of the potential were described and exact analytical results for the suddenly moved potential were presented.
Abstract: We describe the dynamics of a bound state of an attractive δ-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 wave function 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.
12 citations
TL;DR: In this paper, the phase spectrum is reconstructed from the amplitude spectrum in a finite spectral range with the aid of one or more phase-anchoring values using spectral ballistic imaging to partially mitigate the finite-range effects.
Abstract: The differential multiply subtractive Kramers-Kronig (DMSKK) method is utilized for deriving the optical spectral response of a 1D scattering medium The technique is based on the multiply subtractive Kramers-Kronig technique, where the phase spectrum is reconstructed from the amplitude spectrum in a finite spectral range with the aid of one or more phase-anchoring values We employ a new phase-anchoring technique in the DMSKK method to partially mitigate the finite-range effects This method incorporates spectral ballistic imaging to anchor the phase difference (instead of the phase directly) at one or more reference wavelengths The simplicity of phase derivative measurements and its utilization in the DMSKK method are emphasized by a simple experiment
5 citations
TL;DR: In this paper, a simple decay model is introduced, which comprises a point potential well, which experiences an abrupt change due to the temporal variation, and the initial quantum state can either escape from the well or stay localized as a new bound state.
Abstract: A simple decay model is introduced. The model comprises a point potential well, which experiences an abrupt change. Due to the temporal variation, the initial quantum state can either escape from the well or stay localized as a new bound state. The model allows for an exact analytical solution while having the necessary features of a decay process. The results show that the decay is never exponential, as classical dynamics predicts. Moreover, at short times the decay has a fractional power law, which differs from perturbation quantum method predictions. At long times the decay includes oscillations with an envelope that decays algebraically. This is a model where the final state can be either continuous or localized, and that has an exact analytical solution.
4 citations
Proceedings Article•
16 Oct 2009TL;DR: In this article, a 43Gb/s DPSK format data transmission through 66 WSSs was demonstrated through 66 Wavelength Selective Switches (WSSs) by optimizing the channel shape of one of the WSSes, the transmission distance was increased from 1600 km to 2600 km with improved BER.
Abstract: A 43Gb/s DPSK format data transmission is demonstrated through 66 Wavelength Selective Switches (WSSes) By optimizing the channel shape of one of the WSSes, the transmission distance was increased from 1600 km to 2640 km with improved BER
4 citations
02 Jun 2009
TL;DR: In this article, the Brillouin nonlinearity in an optical fiber was used to achieve cross-gain modulation and slow light using the optical fiber optical power. And they demonstrated approx. 10{s−4} c group velocity with milliwatts of optical power with milli-volt energy.
Abstract: We introduce a new method of achieving cross-gain modulation and slow light using the Brillouin nonlinearity in an optical fiber. We demonstrate approx. 10{s−4} c group velocity using this technique with milliwatts of optical power.
1 citations
31 May 2009
TL;DR: In this article, the Kramers-Kronig technique is used to reconstruct the impulse response of a diffusive media with picosecond resolution, and an object within clothing at a distance of 3m from the detection system is detected.
Abstract: The Kramers-Kronig technique is used to reconstruct the impulse-response of a diffusive media with picosecond resolution. We demonstrate the ability to image an object within clothing at a distance of 3m from the detection system.