Speckle Suppression of OKG Imaging in Highly Turbid Medium Using SC-Assisted Fundamental Frequency

We propose a method to suppress the speckle of optical Kerr gated (OKG) imaging in highly turbid medium using an 800-nm femtosecond laser, in which, the 800-nm fundamental frequency light and the supercontinuum (SC) containing the fundamental frequency are used as the gating beam and imaging beam, respectively. A sequence of images of a test chart hidden behind a highly turbid medium is obtained using the OKG technique. Compared with images obtained with OKG imaging using only the fundamental frequency, the image resolution and contrast of images obtained through OKG imaging using the SC-assisted fundamental frequency are both significantly enhanced.