Simultaneous self-phase modulation and two-photon absorption measurement by a spectral homodyne Z-scan method.

Published

Journal Article

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.

Full Text

Duke Authors

Cited Authors

  • Fischer, MC; Liu, HC; Piletic, IR; Warren, WS

Published Date

  • March 2008

Published In

Volume / Issue

  • 16 / 6

Start / End Page

  • 4192 - 4205

PubMed ID

  • 18542515

Pubmed Central ID

  • 18542515

Electronic International Standard Serial Number (EISSN)

  • 1094-4087

International Standard Serial Number (ISSN)

  • 1094-4087

Digital Object Identifier (DOI)

  • 10.1364/oe.16.004192

Language

  • eng