We show that phase-sensitive detection of spectral hole refilling can yield information about self-phase modulation and two-photon absorption coefficients. We expect that, when applied to tissue microscopy, this technique will allow the study of endogenous molecular markers beneath the surface, even if those markers are nonfluorescent.
© 2005 Optical Society of America
Martin C. Fischer, Tong Ye, Gunay Yurtsever, Anthony Miller, Maria Ciocca, Wolfgang Wagner, and Warren S. Warren, "Two-photon absorption and self-phase modulation measurements with shaped femtosecond laser pulses," Opt. Lett. 30, 1551-1553 (2005)