Detailed analysis of MSE spectra

Figure 4: fft spectrum for mse operating with both pems at their customary retardance
(R 1 = R 2 = π) for imperfect perfect mirrors having a moderate phase shift, δ = 5 o and
unity reflectivity for S- and P- polarization. A field-line pitch angle of 24 o with respect to
the pem optics is assumed. Note that the mirror’s phase shift creates new but rather small
fft amplitudes near the first and third harmonics of both pem frequencies.
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