Analisis Pergeseran ¼ λ Distributed Feedback Laser Dioda (DFB LD) pada Serat Optik

LAMPIRAN

Universitas Sumatera Utara

A. Panjang gelombang dan pergeserannya
clc
clear
Lb = 1550*10^(-9);
Le = 10000*10^(-6);
ne = 1.5;
X = 2*ne*Le;
m = 0;
while m < 5
L_pos
= Lb + ((Lb^2/X)*(m+0.5));
L_positif(m+1)= L_pos;
m = m+1;
end
m = 0;
while m < 5
L_neg

= Lb - ((Lb^2/X)*(m+0.5));
L_negatif(m+1)= L_neg;
m = m+1;
end

L_positif
L_negatif
t = [0.25,0.75,1.25,1.4,2.25];
subplot(2,1,2);
plot(L_positif,t,'om-');
grid on;
title('Pergeseran Lambda disisi kanan')
ylabel('Pegeseran Panjang Gelombang');
xlabel('Panjang Gelombang');
subplot(2,1,1);
plot(L_negatif,t,'ob-');
grid on;
title('Pergeseran Lambda disisi kiri');
ylabel('Pergeseran Panjang Gelombang');
xlabel('Panjang Gelombang');

Universitas Sumatera Utara

B. Redaman
clc
clear
Lb = 1550*10^(-9);
Le = 10000*10^(-6);
ne = 1.5;
X = 2*ne*Le;
m = 0;
while m < 5
L_pos
= Lb + ((Lb^2/X)*(m+0.5));
L_positif(m+1)= L_pos;
m = m+1;
end
m = 0;
while m < 5
L_neg

= Lb - ((Lb^2/X)*(m+0.5));
L_negatif(m+1)= L_neg;
m = m+1;
end

L_positif
L_negatif

t = [0.2,0.22,0.23,0.24,0.25];
subplot(2,1,2);
plot(L_positif,t,'om-');
grid on;
title('Pergeseran Lambda disisi kanan')
ylabel('redaman (dB)');
xlabel('Panjang Gelombang');
subplot(2,1,1);
plot(L_negatif,t,'ob-');
grid on;
title('Pergeseran Lambda disisi kiri');
ylabel('redaman (dB)')

xlabel('Panjang Gelombang');

Universitas Sumatera Utara