Top view diagram of the laser optical train and collection optics used to measure fluorescence excitation line shapes for the Xe lamp discharge.
Example of correlation between points in current cycle (bottom) and sample-held signals from the emission plus fluorescence trace (top) taken from a 60 Hz Xe discharge lamp.
Block diagram of the sample-hold method of synchronizing the fluorescence trace to various times along a discharge current cycle.
Fluorescence excitation line shape at time t 0 for the Xe lamp discharge as compared to the width of a typical CW laser and a pulsed dye laser.
Peak amplitudes of fluorescence excitation line shapes (top), synchronized in time with the lamp discharge current cycle (bottom). Note: Peaks are normalized such that the maximum in the cycle equals unity to eliminate any difference in the amplification factor between the hardware (□) and software (△) versions of the lock-in amplifier.
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