We present a simple iterative pre-distortion algorithm for achieving rapid linear frequency sweep of semiconductor lasers. The achieves the desired swept linearity with only four iterations. derive general formula by establishing relationship between laser output and drive current. frequency-swept source obtained this can be used in FMCW LiDAR systems. Experimentally, we investigated using 1550...

The charge density wave instability in one-dimensional semimetals is usually explained through a Peierls-like mechanism, where the coupling of electrons and phonons induces periodic lattice distortion along certain modes vibration, leading to gap opening electronic band structure lowering symmetry lattice. In this work, we study two prototypical Peierls systems: carbon chain monatomic hydrogen ...

Composite rightand left-handed (CRLH) transmission lines with regularly spaced Schottky varactors are characterized for propagation of short envelope pulses. Due to strong dispersion, a short pulse cannot travel on a conventional CRLH line without distortion. This distortion is compensated for by the effects of Schottky varactors such that the line supports solitonic pulses, whose pulse width d...

Langmuir wave turbulence generated by a beamplasma interaction has been studied since the early days of plasma physics research. Despite a long history of investigation on this subject, among the outstanding issues is the generation of harmonic Langmuir waves observed in both laboratory and computer-simulated experiments. However, the phenomenon has not been adequately explained in terms of the...

What happens when people witness an event, say, a crime or accident, and are later exposed to new information about that event? Two decades of research have been devoted to the influence of new information on the recollections of such witnesses. An all-too-common findIng is that after receipt of new information that is misleading in some way, people make errors when they report what they saw. N...

The major concern to authenticate an audio signal is restoring its basic audible properties and providing such a way that may not produce any unusual perception to listeners. Therefore, authenticating an audio signal needs to embed as less as minimum security code within tolerable range of perception. In this paper, perceptual encoding has been applied for structuring song signal in a specified...