Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Breakdown of optical power limiting and dynamical two-photon absorption for femtosecond laser pulses in molecular medium

Not Accessible

Your library or personal account may give you access

Abstract

We solve numerically the Maxwell–Bloch equations using an iterative predictor-corrector finite-difference time-domain technique to study the propagation of femtosecond laser pulses in a strong two-photon absorption (TPA) organic molecular medium [4,4-bis(dimethylamino) stilbene]. The hybrid density functional theory is used to calculate electronic structures of the compound. The molecular system is described by a three-level model in an optical regime and has demonstrated a good optical power limiting behavior in a certain intensity region. Thresholds for the breakdown of optical power limiting are observed that are dependent on the input pulse width and, slightly, the propagation distance. The dynamical two-photon absorption cross section is obtained, which is almost a linearly increasing function of the pulse width in the femtosecond time domain. The propagation distance also has an obvious influence on the measurement of the TPA cross section, and nonmonotonic dependence of the TPA cross section on propagation distance is observed. The input pulse width and the thickness of the molecular samples thus should be taken into account when the TPA cross section is measured.

© 2007 Optical Society of America

Full Article  |  PDF Article
More Like This
Dynamics of two-photon absorption by molecules and solutions

F. Gel’mukhanov, A. Baev, P. Macák, Y. Luo, and H. Ågren
J. Opt. Soc. Am. B 19(5) 937-945 (2002)

Dynamic spatiotemporal pulse shaping in two-photon active biomolecular media

Edeltraud Gehrig and Ortwin Hess
J. Opt. Soc. Am. B 24(3) 522-526 (2007)

Two-photon absorption and broadband optical limiting with bis-donor stilbenes

J. E. Ehrlich, X. L. Wu, I.-Y. S. Lee, Z.-Y. Hu, H. Röckel, S. R. Marder, and J. W. Perry
Opt. Lett. 22(24) 1843-1845 (1997)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (6)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (18)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved