ON THE PAPER BY L.S. KONEV ET AL. “SIMULATING EVOLUTION OF FORWARD AND BACKWARD WAVES OF FEW-CYCLE PULSES PROPAGATING IN AN OPTICAL WAVEGUIDE WITH DISPERSION AND CUBIC NONLINEARITY OF ELECTRONIC AND ELECTRONIC-VIBRATION NATURE”
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For citation: Rosanov N.N. On the paper by L.S. Konev et al. “Simulating evolution of forward and backward waves of few-cycle pulses propagating in an optical waveguide with dispersion and cubic nonlinearity of electronic and electronic-vibration nature”. Scientific and Technical Journal of Information Technologies, Mechanics and Optics, 2015, vol. 15, no. 5, pp. 954–955.
Problem statement ill-posedness in the paper by L.S. Konev et al. devoted to formation of backward wave at short laser pulse propagation in nonlinear media or fibers is specified. It is inconceivable in the correct problem statement to consider the radiation field at the medium entrance as a given function of time due to generation of backward wave in the medium, when the backward wave characteristics are target values. The proper evolution variable is time, and it is convenient to use the adopted finite-difference time-domain (FDTD) method for backward wave calculation.
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