Quinquenary codes have been widely used in radar and communication areas, but the design of Quinquenary codes with good merit factor is a nonlinear multivariable optimization problem, which is usually difficult to tackle. To get the solution of above problem many global optimization algorithms like genetic algorithm, simulated annealing, and tunneling algorithm were reported in the literature. ...

Multiple platform coherent location systems operate by computing the time difference of arrival (TDOA) and frequency difference of arrival (FDOA) among signals received at geographically separated platforms. The bandwidth of the data link is the major bottleneck in the processing. Previously developed data compression methods [1, 2] can not satisfy the compression ratio and the accuracy require...

A novel technique to generate ultrashort fundamental solitons is proposed and demonstrated numerically. The technique utilizes both the multisoliton pulse-compression effect and the switching characteristics of a nonlinear optical loop mirror constructed from dispersion-decreasing fiber. We show that, in contrast to the conventional soliton-effect pulse compression in which compressed pulses ar...

Self-compression of visible optical pulse in bulk χ medium has been demonstrated taking the advantage of negative group-velocity dispersion of tilted pulses.

Wave-breaking often occurs when a short intense optical pulse propagates in a long normally dispersive optical fiber. This effect has conventionally been avoided in fiber (super-)continuum-based pulse compression because the accumulated frequency chirp of the output pulse cannot be fully compensated by a standard prism (or grating) pair. Thus, the spectral extending capability of the wave-break...

João L. Silva, Rosa Weigand, Helder M. Crespo, IFIMUP/IN Institute of Nanoscience and Nanotechnology and Departamento de F́ısica, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre, 687, 4169-007 Porto, Portugal Departamento de Óptica, Facultad de Ciencias F́ısicas, Universidad Complutense de Madrid, Ciudad Universitaria s/n, 28040 Madrid, Spain ∗Corresponding author: [email protected]

We demonstrate efficient spectral compression of picosecond pulses in an all-fiber configuration at telecommunication wavelengths. Thanks to parabolic pulse shaping, a spectral compression by a factor 12 is achieved with an enhanced Strehl ratio. OCIS codes: 190.4370 (nonlinear optics, fibers), 320.5540 (pulse shaping), 070.4340 (optical signal processing)

We study soliton pulse compression in materials with cascaded quadratic nonlinearities and show that the group-velocity mismatch creates two different temporally nonlocal regimes. They correspond to what is known as the stationary and nonstationary regimes. The theory accurately predicts the transition to the stationary regime, where highly efficient pulse compression is possible. c © 2014 Opti...