OSA's Digital Library

Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 21, Iss. 8 — Aug. 1, 2004
  • pp: 1559–1567

Femtosecond pump–probe study of preformed plasma channels

Rafal Zgadzaj, Erhard W. Gaul, Nicholas H. Matlis, Gennady Shvets, and Michael C. Downer  »View Author Affiliations


JOSA B, Vol. 21, Issue 8, pp. 1559-1567 (2004)
http://dx.doi.org/10.1364/JOSAB.21.001559


View Full Text Article

Enhanced HTML    Acrobat PDF (825 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

We report femtosecond pump–probe experiments in He plasma waveguides using 800-nm, 80-fs pump pulses of 0.2×1018 W/cm2 peak guided intensity and single orthogonally polarized 800-nm probe pulses ∼0.1% as intense as the pump. Single-shot spectra and spatial profiles of the probe pulses exiting the channels are measured through a crossed-polarization analyzer at various pump–probe time delays Δt. At |Δt|100 fs, we observe frequency-domain interference between the probe and a weak component of the exiting pump created by hybridization of its polarization state through interaction with the channel. Frequency-domain interference measurements show this “depolarized” component differs substantially in mode structure from the injected pump pulse. This component is nearly undetectable by direct measurements of pump leakage without the probe. We analyze possible causes of depolarization within the channel and near its entrance and exit regions. At Δt0, i.e., the probe pulse propagates in the leading edge of the pump pulse, we observe spectral blueshifts in the transmitted-probe spectrum that are not evident in the transmitted pump. The evidence indicates that pump depolarization and probe blueshifts both originate primarily near the channel entrance.

© 2004 Optical Society of America

OCIS Codes
(230.7380) Optical devices : Waveguides, channeled
(320.0320) Ultrafast optics : Ultrafast optics
(320.7100) Ultrafast optics : Ultrafast measurements
(350.5400) Other areas of optics : Plasmas

Citation
Rafal Zgadzaj, Erhard W. Gaul, Nicholas H. Matlis, Gennady Shvets, and Michael C. Downer, "Femtosecond pump-probe study of preformed plasma channels," J. Opt. Soc. Am. B 21, 1559-1567 (2004)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-21-8-1559

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

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

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

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

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

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

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

« Previous Article

OSA is a member of CrossRef.

CrossCheck Deposited