OSA's Digital Library

Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 16, Iss. 11 — Nov. 1, 1999
  • pp: 1988–1994

Two-photon excitation cross section of the BX(0,0) band of CO measured by direct absorption

Michael D. Di Rosa and Roger L. Farrow  »View Author Affiliations


JOSA B, Vol. 16, Issue 11, pp. 1988-1994 (1999)
http://dx.doi.org/10.1364/JOSAB.16.001988


View Full Text Article

Acrobat PDF (176 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 new measurements of the two-photon absorption rate in the B←X(0,0) band of CO, as determined from absorption spectra obtained with Fourier-transform-limited pulses of well-characterized spatial profile. By comparing measured absorption spectra of the CO Q branch near 230 nm with a nonlinear model for the pulse attenuation, we derive the spectrally integrated cross section σ0(2). The space- and time-dependent model considers two-photon absorption followed by one-photon photoionization of the excited state. The Q-branch spectral profile is simulated with previously measured coefficients of collisional broadening and shift. Remarkably, for modest irradiances of 80–350 MW/cm2 at the focus, attenuations of 10% and greater at the Q-branch peak were observed in a single pass through neat CO at pressures of 12–33 kPa. Our result for the spectrally integrated cross section, averaged over five experiments, is σ0(2)=(1.5+0.7/−0.2)×10−35 cm4.

© 1999 Optical Society of America

OCIS Codes
(300.1030) Spectroscopy : Absorption
(300.6390) Spectroscopy : Spectroscopy, molecular
(300.6410) Spectroscopy : Spectroscopy, multiphoton
(300.6420) Spectroscopy : Spectroscopy, nonlinear
(300.6540) Spectroscopy : Spectroscopy, ultraviolet

Citation
Michael D. Di Rosa and Roger L. Farrow, "Two-photon excitation cross section of the BX(0,0) band of CO measured by direct absorption," J. Opt. Soc. Am. B 16, 1988-1994 (1999)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-16-11-1988

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. 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  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited