34 -- Instruments built from elements¶

Three instruments from the same parts, written with the Python API (Branched systems):

• an interferometer with an SHG crystal after it is an interferometric autocorrelator, with its 8:1 ratio of peak to background;
• with a plain detector it is a Fourier-transform spectrometer: the transform of the interferogram is the spectrum;
• a crystal fed by two arms, read by a spectrometer at each delay, is a FROG: arrayOutputs keeps the whole spectrum per point in study.npz.

cd docs/examples/Diagnostics/modelled-instruments
python instruments.py              # about 1.5 minutes

IAC peak / background  8.000   analytic 8
FTS centroid 1030.21 nm   input 1030.21 nm
FROG marginal FWHM 84.9 fs   analytic 84.9 fs

An f-2f interferometer is Example 37.