We have designed a common-mode interferometric acousto-optic pulse shaper that is capable of shaping individual pulses differently from a mode-locked laser. The design enables the measurement of weak nonlinear optical signals such as two-photon absorption and self-phase modulation at megahertz rates. The experimental apparatus incorporates homodyne detection as a means of resolving the phase of the detected signals. The fast data acquisition rate and the ability to perform measurements in scattering media make this experimental apparatus amenable to imaging applications analogous to measurements of two-photon fluorescence using a mode-locked laser.
© 2008 Optical Society of America
Instrumentation, Measurement, and Metrology
Original Manuscript: April 3, 2008
Revised Manuscript: May 19, 2008
Manuscript Accepted: May 28, 2008
Published: June 25, 2008
Ivan R. Piletic, Martin C. Fischer, Prathyush Samineni, Gunay Yurtsever, and Warren S. Warren, "Rapid pulse shaping with homodyne detection for measuring nonlinear optical signals," Opt. Lett. 33, 1482-1484 (2008)