We developed a pump–probe setup that can be used for free electron lasers based four-wave mixing experiments in the extreme ultraviolet/soft x-ray spectral range. The main feature of the proposed optical layout is the absence of transmission optics. Test measurements on liquid and solid samples carried out using the transient grating technique in both transmission and reflection geometry demonstrate the reliability of the setup.
© 2011 Optical Society of America
Original Manuscript: October 6, 2010
Revised Manuscript: February 22, 2011
Manuscript Accepted: February 22, 2011
Published: March 16, 2011
R. Cucini, F. Bencivenga, and C. Masciovecchio, "All-reflective femtosecond optical pump–probe setup for transient grating spectroscopy," Opt. Lett. 36, 1032-1034 (2011)