O-band Amp Characterization Measurement

Functions/Metrics/noiseFigureFromOSNR.m

@@ -0,0 +1,20 @@
+function NF_dB = noiseFigureFromOSNR(Pin_dBm, OSNR_dB, lambda_nm, Bref_nm)
+
+    if nargin < 4
+        Bref_nm = 0.1; % OSNR reference bandwidth
+    end
+
+    h = 6.62607015e-34;   % Planck [J*s]
+    c = 299792458;        % speed of light [m/s]
+
+    lambda = lambda_nm * 1e-9;
+    nu = c / lambda;
+
+    % convert reference bandwidth from nm to Hz
+    Bref_Hz = Bref_nm*1e-9 * c / lambda^2;
+
+    % ASE noise power density in dBm
+    Pn_dBm = 10*log10(h*nu*Bref_Hz) + 30;
+
+    NF_dB = Pin_dBm - OSNR_dB - Pn_dBm;
+end