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We propose a collinear optical Kerr effect (OKE) based time-gateconfiguration with low coherence illumination source, derived from thesupercontinuum (SC) generated by focusing the femtosecond laser pulses insidewater. At first the spectral broadening in SC generation and correspondingchanges in its coherence properties are studied and then a narrow band ofwavelengths is extracted to use as the probe beam in the OKE-based time-gateconfiguration. The gate timings and spatial resolution of the time-gated imagesare also investigated. The low coherence of the probe ensures that theartifacts due to speckles from the laser are reduced to a minimum. Toillustrate this a comparison of the time-resolved images of the fuel spraysobtained with this configuration has been made with the images obtained withthe collinear, dual color configuration of the optical gate with coherentillumination.

Time-resolved imaging with OKE-based time-gate: enhancement in spatial resolution using low-coherence ultra-short illumination