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The light beam with Laguerre-Gaussian (LG) mode has attracted remarkable attentions these days because of its unique features and possible applications [1]. This mode has a phase singularity at the center of the beam, and has phase distribution proportional to the angular coordinate. Because the phase front of this mode is twisted around the center of the beam, LG beam can transfer orbital angular...
Simulation of pulse propagation in fiber optics is carried out by solving nonlinear Schrodinger equation. Both dispersive and nonlinear effects have been catered. In order to get speedy and accurate results adaptive step size algorithm has been adopted. The results are checked and found in coherence with conventional numerical algorithm. The work was carried out keeping the pretext in front that an...
We report the demonstration of coherent control of second harmonic generation (SHG) with over three orders of magnitude contrast in the SHG yield. Under conditions of large group-velocity mismatch and narrow phase matching bandwidth, we show that SHG can serve (in the perturbative limit) as a nonlinear optical but classical analogue for quantum mechanical two-photon transitions in atomic media, with...
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