We report the use of sum- and difference-frequency generation for two-dimensional upconversion time gating. Using difference-frequency generation, which can provide gain as well as upconversion (as an optical parametric amplifier), we have imaged through a scattering medium with an attenuation of exp(−25), using 1 mJ of energy from a single laser pulse.
© 1994 Optical Society of America
Original Manuscript: August 2, 1994
Published: November 15, 1994
Gregory W. Faris and Michael Banks, "Upconverting time gate for imaging through highly scattering media," Opt. Lett. 19, 1813-1815 (1994)