Frequency Resolved Optical Gating: Measuring the World's Smallest Ruler

"This thesis documents the workings, construction, and collected data of a FROG (Frequency Resolved Optical Gating) device. This device is necessary to characterize ultrafast pulsed lasers for use in an ultrafast electron diffraction experiment. FROG operates by producing a spectrogram of a laser pulse and inferring the temporal profile via a FROG inversion algorithm. FROG was constructed in our lab and data suggests reliable operation for 1550 nm pulses. FROG currently fails to produce convincing results for 1030 nm pulses. Optimization is possible by improving phase-matching conditions and implementing FROG trace corrections for data indicative of poor phase-matching."

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