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We demonstrate a prototype Frequency Domain Streak Camera (FDSC) that can capture the picosecond time evolution of the plasma accelerator structure in a single shot. In our prototype Frequency‐Domain Streak Camera, a probe pulse propagates obliquely to a sub‐picosecond pump pulse that creates an evolving nonlinear index “bubble” in fused silica glass, supplementing a conventional Frequency Domain Holographic (FDH) probe‐reference pair that co‐propagates with the “bubble”. Frequency Domain Tomography (FDT) generalizes Frequency‐Domain Streak Camera by probing the “bubble” from multiple angles and reconstructing its morphology and evolution using algorithms similar to those used in medical CAT scans. Multiplexing methods (Temporal Multiplexing and Angular Multiplexing) improve data storage and processing capability, demonstrating a compact Frequency Domain Tomography system with a single spectrometer.

Frequency-Domain Streak Camera and Tomography for Ultrafast Imaging of Evolving and Channeled Plasma Accelerator Structures