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Theory stuff from sials work pc; minor stuff here and there

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Silas Oettinghaus
2026-02-19 15:11:32 +01:00
parent 1b8d83dec0
commit 2a724b833f
14 changed files with 810 additions and 39 deletions
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11
Classes/03_receive/Photodiode.m
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@@ -22,7 +22,7 @@ classdef Photodiode
options.responsivity = 1;
options.dark_current = 0;
options.temperature = 20;
options.nep = 0; %(Moveit IMDD Standard: 1.8e-11) noise effective power in pA/sqrt(Hz); usually between 10-20 pA; see J.Leibrich Diss/ S. Pachnicke Slides
options.nep = 0; %(Moveit IMDD Standard: 1.8e-11 == current noise density in A/sqrt(Hz)! ); usually between 10-20 pA/sqrt(Hz); see J.Leibrich Diss/ S. Pachnicke Slides
options.randomkey = 1;
end
@@ -72,9 +72,16 @@ classdef Photodiode
yout = yout + shot_noise;
% Thermal Noise
% 2026 comment: obj.nep is not the correct naming, but math-wise everything is fine!
% (2 * k * T / R ) -> A^2/Hz -> is the psd of thermal noise
% earlier: move it's 1.8e-11 is current noise density -> A/sqrt(Hz)
% power (of white process) is simple multiplication of PSD(f) and B
% NEP is noise equivalent power, see Dissertation j. Leibrich
% P. 121 or Stephan Pachnicke Optical Comm. Lecture Slides
if obj.nep == 0
if obj.nep == 0 %
nep_squared = (2 * k * T / R ) ; %squared
else
nep_squared = obj.nep^2;