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Optik Moderen

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8.3 Proses <strong>Optik</strong>-optikSecond and third harmonics generationωω2ω3ωSHGTHG[ ](1) (2)(3)2χ + χ E(z,ω)+ χ E(z,ω)......... E(z,ω)P(z,ω)= εo +Misalkan:E( z,ω)=E(z)cosωtP(z,ω)= εo= εoχχ+(1)(1)E(z)cosωt+ ε12E(z)cosωtεoχ(2)E2oχ(2)E( z)cos( z)(1+ cos2ωt) +2142ωt+ εεoχ(3)oEχ2(3)E2( z)cos( z)(3cosωt+ cos3ωt)3ωtJadi, suatu bahan optik nonlinier dapat melipatgandakan frekuensi.140

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