Using 1-μm InP HBT technology, a transimpedance amplifier (TIA) IC for optical links using 100-Gb/s dual polarization quadrature phase shift keying (100-G DP-QPSK) was designed and fabricated. Its wide dynamic range of 0.2∼2mAppd input current and good linearity of less than 3.3-% total harmonic distortion (THD) were confirmed. Also, externally controllable functions such as output amplitude ad...

We calculate exactly the density of magnon states of the regularly alternating spin2 XX chain with Dzyaloshinskii-Moriya interaction. The obtained result permit us to examine the stability of the chain with respect to spin-Peierls dimerization. We found that depending on the dependences of Dzyaloshinskii-Moriya interaction on distortion amplitude it may act either in favour of the dimerization ...

This paper focuses on a method for modelling small nonlinear loads by means of frequency coupling admittance matrices. Based on measurements the used technique delivers equivalent Norton admittance matrices of the actual non-linear device. Various types of LED lamps serve as test objects. It is shown how the absorbed currents vary in dependency of amplitude and phase of voltage harmonic distort...

We analyze the ergodic capacity and epsilon-outage capacity of coherent optical links through the turbulent atmosphere. We consider the effects of log-normal amplitude fluctuations and Gaussian phase fluctuations, in addition to local oscillator shot noise, for both passive receivers and those employing active modal compensation of wavefront phase distortion. We study the effect of various para...

Redshift maps of galaxies in the Universe are distorted by the peculiar velocities of galaxies along the line of sight. The amplitude of the distortions on large, linear scales yields a measurement of the linear redshift distortion parameter, which is β ≈ Ω 0.6 0 /b in standard cosmology with cosmological density Ω 0 and light-to-mass bias b. All measurements of β from linear redshift distortio...

This paper discusses nonlinear acoustic synthesis in augmented musical instruments via acoustic transduction. Our work expands previous investigations into acoustic amplitude modulation, offering new prototypes that produce intermodulation in several instrumental contexts. Our results show nonlinear intermodulation distortion can be generated and controlled in electromagnetically driven acousti...

Abstract The measurement and analysis of wideband mobile channel are the foundations of network coverage and wireless network optimization. An outdoor propagation measurement campaign in which the sounding signal is PN sequence at 2.6GHz has been performed in Beijing recently, and the result shows that slippage correlation based on PN sequence is capable to probe the channel impulse response (C...

We have designed a plenoptic sensor to retrieve phase and amplitude changes resulting from a laser beam's propagation through atmospheric turbulence. Compared with the commonly restricted domain of (-π,π) in phase reconstruction by interferometers, the reconstructed phase obtained by the plenoptic sensors can be continuous up to a multiple of 2π. When compared with conventional Shack-Hartmann s...

We demonstrate experimentally and explain theoretically polarization-preserving imaging through a lossy amplitude-distorting medium. This is accomplished by propagating the beam, before its arrival at the lossy distorting medium, through a (multi) mode- and polarization-scrambling fiber and reflecting the signal, after it has passed the lossy distorting medium, from a photorefractive phase-conj...

The study of asymmetrical patterns of the light diffracted by ultrasonic waves has been utilized in the last decades to investigate ultrasonic wave distortions caused by the nonlinearity of the medium. In contrast to the investigation of diffraction patterns in space, a novel optical method is proposed in this work to analyze, in the frequency domain, the phase modulation (related to the Raman-...