Abstract

In femtosecond degenerate four-wave mixing experiments in sodium vapor, quantum beats are observed at the wavelength of the third harmonic when the fundamental beams are three-photon resonant. The period of beating, which corresponds to fine structure energy-level splitting, does not change with the atomic number density, buffer gas pressure, or laser intensity. Surprisingly, the third-harmonic signal is observed only at negative time delays for the transient grating pulse sequence. We relate this to the well-known interference effect between excitation pathways involving the fundamental and the third-harmonic fields, which leaves atoms virtually unexcited and prevents formation of population grating.

© 2013 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Modulation of third-harmonic generation conversion in the presence of a rotational wave packet

Klaus Hartinger and Randy A. Bartels
Opt. Lett. 33(11) 1162-1164 (2008)

Background-free third-order harmonic generation induced by dynamic gratings in dual filaments

Hong Wu, Tiejun Yang, Yanling Wang, and Liang'en Ding
J. Opt. Soc. Am. B 26(4) 645-649 (2009)

Oxygen atom detection using third harmonic generation

Francis G. Celii, Helen R. Thorsheim, Maureen A. Hanratty, and James E. Butler
Appl. Opt. 29(21) 3135-3142 (1990)

References

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
Login to access OSA Member Subscription

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 OSA member, or as an authorized user of your institution.

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

Figures (5)

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
Login to access OSA Member Subscription

Metrics

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
Login to access OSA Member Subscription