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We present an optical Kerr effect based time-gate with the collinearincidence of the pump and probe beams at the Kerr medium, liquid carbondisulfide, for ballistic imaging of the high-pressure fuel sprays. The probepulse used to illuminate the object under study is extracted from thesupercontinuum generated by tightly focusing intense femtosecond laser pulsesinside water, thereby destroying their coherence. The optical imaging spatialresolution and gate timings are investigated and compared with a similar setupwithout supercontinuum generation, where the probe is still coherent. Andfinally, a few ballistic images of the fuel sprays using coherent andincoherent illumination with the proposed time-gate are presented and comparedqualitatively.

Ballistic Imaging of High-Pressure Fuel Sprays using Incoherent, Ultra- short Pulsed Illumination with an Ultrafast OKE-based Time Gating