Numerical and Experimental Study of Spectrum Shuttle for Generating GHz Burst Pulses Without Sacrificing Spectral Ranges in Advanced Ultrafast Imaging

For burst pulse generation in ultrafast photography, the significant loss of spectral ranges remains a persistent challenge. To address this, we present a spectrum shuttle, an optical technique that produces spatially nondispersive and spectrally separated GHz burst pulse. We demonstrated the spectrum shuttle effectively preserved these ranges through simulations and experiments. The utility of the generated burst pulses was validated in two-color single-shot imaging of laser ablation dynamics with 250 ps frame intervals in 800-nm and 400-nm wavelength bands.