Publications [#234515] of Warren S. Warren

Journal Articles
  1. Fischer, MC; Liu, HC; Piletic, IR; Warren, WS, Simultaneous self-phase modulation and two-photon absorption measurement by a spectral homodyne Z-scan method., Optics express, vol. 16 no. 6 (March, 2008), pp. 4192-4205 [18542515] .

    We developed a technique to simultaneously measure self-phase modulation and two-photon absorption using shaped femtosecond laser pulses. In the conventional Z-scan measurement technique the amount of nonlinearity is determined by measuring the change in shape and intensity of a transmitted laser beam. In contrast, our method sensitively measures nonlinearity-induced changes in the pulse spectrum. In this work we demonstrate the technique in nonlinear absorptive and dispersive samples, quantify the obtained signal, and compare the measurements with traditional Z-scans. This technique is capable of measuring these nonlinearities in highly scattering samples.