An ultrafast all-optical shutter is presented, based on a simple two-color, two-photon absorption technique. For time-resolved luminescence measurements, this shutter is an interesting alternative to the optical Kerr gate. The rejection efficiency is 99%; the switching-off and switching-on speeds are limited by the pulse length only; the rejection time is determined by the crystal slab thickness; and the bandwidth spans the entire visible spectrum. We show that our shutter can also be used for accurate measurement of group velocity inside a transparent material.
© 2011 Optical Society of America
Original Manuscript: April 26, 2011
Revised Manuscript: May 30, 2011
Manuscript Accepted: June 16, 2011
Published: July 19, 2011
Marijn A. M. Versteegh and Jaap I. Dijkhuis, "Ultrafast all-optical shutter based on two-photon absorption," Opt. Lett. 36, 2776-2778 (2011)