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Diffstat (limited to '3415/CH11/EX11.10/Ex11_10.sce')
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1 files changed, 18 insertions, 0 deletions
diff --git a/3415/CH11/EX11.10/Ex11_10.sce b/3415/CH11/EX11.10/Ex11_10.sce new file mode 100644 index 000000000..49851456b --- /dev/null +++ b/3415/CH11/EX11.10/Ex11_10.sce @@ -0,0 +1,18 @@ +//fiber optic communications by joseph c. palais
+//example 11.10
+//OS=Windows XP sp3
+//Scilab version 5.4.1
+clc
+clear all
+//given
+RINdB=-140//RIN in dB/Hz
+deltaf=100*10^6//bandwidth in Hz
+P=10*10^-6//Average incident power in Watts
+Row=0.5//Responsivity in uA/uW
+
+//to find
+RIN=10^(RINdB/10)//RIN in /Hz
+PNL=sqrt(RIN*P^2*deltaf)//Laser Noise power in Watt
+mprintf("Laser Noise power=%fuW",PNL*10^6)//multiplication by 10^6 to cinvert the unit from W to uW
+IN=Row*PNL// Noise current in A
+mprintf(" \nNoise current=%fuA",IN*10^6)//multiplication by 10^6 to cinvert the unit from A to uA
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