Patent ID: 6694103
Filing Date: 2004-02-17
Classification: G02F

Abstract:
A method for switching, amplification and modulation of unidirectional distributively coupled pulses and waves, consisting in that they feed optical radiation in the form of pulses into the input of tunnel-coupled optical waveguides having nonlinearity and the second-order dispersion, the switching of the pulses from one waveguide to the other one is fulfilled by variation of at least one parameter of the radiation,CHARACTERIZED in that said tunnel-coupled optical waveguides have quadratic nonlinearity, the pulses are fed at frequencies &ohgr; and 2&ohgr; into the input of one of tunnel-coupled optical waveguides, or into inputs of the different tunnel-coupled optical waveguides, input normalized complex amplitudes of the pulses correspond to formulas Ajk(z=0)=&agr;jkexp(i&phgr;jk)/cos h&mgr;[(tâˆ’tjk,d)/&tgr;jk,p], or Ajk(z=0)=&agr;jkexp(i&phgr;jk)exp[âˆ’(tâˆ’tjk,d)&mgr;/&tgr;jk,p&mgr;], where 1.5&lE;&mgr;&lE;2.5, k=0,1 is number of the optical waveguide, j=1 corresponds to frequency &ohgr;, j=2 corresponds to frequency 2&ohgr;, t is time, &tgr;jk,p is duration of input pulse at the input of the k-th optical waveguide at frequency j&ohgr;, tjk,d is time delay of the pulse at the input of the k-th optical waveguide at frequency j&ohgr;, &phgr;jk is input phase of the pulse with frequency j&ohgr; at the input of the k-th waveguide, &agr;jk is real normalized amplitude of the pulse with frequency j&ohgr; at the input of the k-th waveguide,the input normalized real amplitudes &agr;jk of fed pulses are chosen to satisfy to at least one pair of following pairs of inequalities: &agr;10&gE;2 and &agr;20&gE;2, &agr;11&gE;2 and &agr;21&gE;2, &agr;11&gE;2 and &agr;20&gE;2, &agr;21&gE;2 and &agr;10&gE;2, under this the switching of the pulses from one waveguide to another is done by change of amplitude a10 and/or amplitude a11, and/or amplitude a20, and/or amplitude a21, or phase &phgr;10, and/or phase &phgr;11, and/or phase &phgr;20, and/or phase &phgr;21 of fed pulses at the input of at least one of said optical waveguides with at least one of said frequencies.