Calculations are performed of the phase shift caused by the spatial modulation in the plasma density due to interference between a strong pump pulse and a weak probe pulse. It is suggested that a recent experiment [ Opt. Express 17, 13429 (2009)] observed an effective birefringence from this plasma grating rather than from the higher-order Kerr effect.
© 2011 Optical Society of America
Original Manuscript: July 14, 2011
Revised Manuscript: August 27, 2011
Manuscript Accepted: September 3, 2011
Published: September 23, 2011
J. K. Wahlstrand and H. M. Milchberg, "Effect of a plasma grating on pump–probe experiments near the ionization threshold in gases," Opt. Lett. 36, 3822-3824 (2011)