Laser and Particle Beams



Experimental prospects at the Canadian advanced laser light source facility


T.  OZAKI  a1 c1 , J.-C.  KIEFFER  a1 , R.  TOTH  a1 , S.  FOURMAUX  a1 and H.  BANDULET  a1
a1 Université du Québec, Institut National de la Recherche Scientifique, Varennes, Québec, Canada

Article author query
ozaki t   [Google Scholar] 
kieffer j-   [Google Scholar] 
toth r   [Google Scholar] 
fourmaux s   [Google Scholar] 
bandulet h   [Google Scholar] 
 

Abstract

We describe here the present status of the Advanced Laser Light Source (ALLS) facility, a state-of-the-art multi-beam Ti:sapphire laser system presently under construction in Canada. ALLS is a national user facility to be commissioned in 2005 at the INRS campus near Montreal. The 25 fs ALLS multi-beam laser system has three components, each with different repetition rate and output energy. These multiple laser beams will be used to generate a “rainbow” of femtosecond pulses from the far infrared to hard X-rays, which can be combined to perform unique experiments, such as dynamic molecular imaging. In this paper, we describe two examples of experiments that are planned by our group with the ALLS facility. The first is the highly efficient generation of high-order harmonics using ablation medium. We demonstrate the generation of up to the 53rd harmonics ([lambda] = 15 nm) of a Ti:sapphire laser pulse (150 fs, 10 mJ), using pre-pulse (210 ps, 24 mJ) produced boron ablation as the nonlinear medium. The second example is the demonstration of in-line phase-contrast imaging with an ultrafast (300 fs) laser-based hard X-ray source (Mo K-[alpha] line). Images of biological samples have shown great enhancement of contrast due to this technique, distinguishing details that are barely observable or even undetectable in absorption images.

(Received June 17 2005)
(Accepted September 18 2005)


Key Words: Dynamic molecular imaging; Femtosecond lasers; High-order harmonic generation; X-ray imaging.

Correspondence:
c1 Address correspondence and reprint requests to: Tsuneyuki Ozaki, Université du Québec, Institut National de la Recherche Scientifique, 1650 Boul. Lionel-Boulet, Varennes, Québec J3X 1S2, Canada. E-mail: ozaki@emt.inrs.ca