Dear Prof Johnson Thanks for your reply. I understood that i have to take time average over half-a-period. But the time-averaged value obtained is different for different periods. For example value of average intensity is different for periods 290-291 ,29-30 or 1-2 etc.... Then which period should i consider for my calculation. My aim is to calculate S-average and use it to find delta(n) to use it in third-order non-linearity. I used run-until 300 time unit. Should i take the period at the last time unit ( 299-300).
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