What is the physical significance of <λ0*2/pi/*Dn2/n2/2> in the line 95 of ThresholdGain_FormulaDFB_Main.m. > if cc>100 > lambda = lambda + lambda0 * 2/pi*Dn2/n2 / 2; > dlambda = jump/100; > cc=0; > end Why you set the interval as so.