An alternative, novel multiple pulse generation scheme was implemented directly after the optical compressor output of an x-ray pump laser. The new method uses a polarization sensitive thin film beam splitter and a half-wavelength wave plate for tuning the energy ratio in the multiple short pulses. Based on this method, an extensive study was made of the running parameters for a grazing incidence pumped silver x-ray laser (XRL) pumped with a long pulse of 145 mJ in 6 ns at 532 nm and up to 1.45 J in few picoseconds at 810 nm. Fivefold enhancement in the emission of the silver XRL was demonstrated using the new pump method.
© 2014 Optical Society of America
Lasers and Laser Optics
Original Manuscript: January 24, 2014
Revised Manuscript: March 11, 2014
Manuscript Accepted: March 13, 2014
Published: April 3, 2014
Gabriel V. Cojocaru, Razvan G. Ungureanu, Romeo A. Banici, Daniel Ursescu, Olivier Delmas, Moana Pittman, Olivier Guilbaud, Sophie Kazamias, Kevin Cassou, Julien Demailly, Olivier Neveu, Elsa Baynard, and David Ros, "Thin film beam splitter multiple short pulse generation for enhanced Ni-like Ag x-ray laser emission," Opt. Lett. 39, 2246-2249 (2014)