<p>I have been working with the Lumerical FDTD and Lumopt API for my simulation setup, and I am currently using the ModeMatch function to set transmission as a figure of merit (FOM) for evaluating insertion loss. The code I’m using looks like this:<\/p><\/p>\n
classlumopt.figures_of_merit.modematch.ModeMatch(monitor_name, mode_number, direction, multi_freq_src=False, target_T_fwd=<function ModeMatch.<lambda>>, norm_p=1)<\/pre>\n<p data-start=”628″ data-end=”817″>As per the documentation, the <code data-start=”658″ data-end=”672″>target_T_fwd<\/code> parameter can be adjusted from 0 to 1 depending on the requirements, and the <code data-start=”750″ data-end=”761″>direction<\/code> parameter can be set as either “forward” or “backward.”<\/p><p data-start=”819″ data-end=”1053″>However, I would like to know if it’s possible to set the <strong data-start=”877″ data-end=”886”>phase<\/strong> as the FOM instead of the transmission in Lumopt. I understand that phase can be extracted from a time monitor using Fourier transforms, as shown in the script below:<\/p><\/p>\n
Ey = pinch(getdata(\"monitor\",\"Ey\"));<br>t = getdata(\"monitor\",\"t\");<br>f = linspace(c\/1600e-9,c\/1500e-9,100);<br>w = 2*pi*f;<br>Ew = czt(Ey,t,w)\/sourcenorm(f);<br>phi = unwrap(angle(Ew));<br>plot(c\/f*1e9,phi,\"Wavelength(nm)\",\"phase\");<br><br><\/pre>\n<p data-start=”1287″ data-end=”1491″>This script successfully calculates the phase values. My question is: Does the Lumopt API allow for phase to be used as the figure of merit (FOM) in place of transmission, and if so, how can this be done?<\/p><p data-start=”1493″ data-end=”1589″>I would greatly appreciate any insights or suggestions from the community regarding this matter.<\/p><\/p>\n
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