Efficient spherical wavefront correction near the focus of the petawatt-level femtosecond CPA laser system

By directly measuring the spherical wavefront near the focus, we demonstrated a approach to efficiently correct convergent spherical wavefront by installing a common small aperture deformable mirror (DM) in the middle of 0.89PW/29.0fs Ti:sapphire CPA laser chain. It is, to our knowledge, the first time attain the near perfect correction result in ultra-intensity laser system by correcting convergent spherical wavefront using a small aperture DM in adaptive optical loop. Finally the maximum peak intensity of 2.59×10^21 W/cm2 was obtained with an f/4 off-axis parabola at the output power of 0.89 PW.

[1]  Zhi‐zhan Xu,et al.  Efficient Spherical Wavefront Correction near the Focus for the 0.89 PW/29.0 fs Ti:Sapphire Laser Beam , 2011 .

[2]  Roberto Benocci,et al.  Efficient aberrations pre-compensation and wavefront correction with a deformable mirror in the middle of a petawatt-class CPA laser system , 2007 .

[3]  Gerard Mourou,et al.  Characterization of focal field formed by a large numerical aperture paraboloidal mirror and generation of ultra-high intensity (1022 W/cm2) , 2005 .

[4]  Zhi‐zhan Xu,et al.  A new theory for the treatment of a pulsed beam propagating through a grating pair , 2001 .

[5]  Benoit Wattellier,et al.  Improvement of the LULI high-energy CPA laser system focusability and repetition rate using an adaptive optical system , 2003, Other Conferences.

[6]  G. Mourou,et al.  Ultra-high intensity- 300-TW laser at 0.1 Hz repetition rate. , 2008, Optics express.

[7]  K. Witte,et al.  Correction of strong phase and amplitude modulations by two deformable mirrors in a multistaged Ti:sapphire laser. , 2002, Optics letters.

[8]  J J Field,et al.  Adaptive correction of a tightly focused, high-intensity laser beam by use of a third-harmonic signal generated at an interface. , 2006, Optics letters.

[9]  H. Pépin,et al.  High-power short-pulse laser repetition rate improvement by adaptive wave front correction , 2004 .

[10]  Jean-Paul Chambaret,et al.  Adaptive wavefront correction on a 100-TW/10-Hz chirped pulse amplification laser and effect of residual wavefront on beam propagation , 2005 .

[12]  G. Mourou,et al.  Wave-front correction of femtosecond terawatt lasers by deformable mirrors. , 1998, Optics letters.

[13]  A. Alexandrov,et al.  Laser beam wavefront correction for ultra high intensities with the 200 TW laser system at the advanced laser light source. , 2008, Optics express.

[14]  Benoit Wattellier,et al.  Optimization of the dynamic wavefront control of a pulsed kilojoule/nanosecond-petawatt laser facility. , 2008, Applied optics.

[15]  Yuxin Leng,et al.  Parasitic lasing suppression in high gain femtosecond petawatt Ti:sapphire amplifier. , 2007, Optics express.

[16]  E. H. Linfoot.  Principles of Optics , 1961 .

[17]  Mathieu Cohen,et al.  Wave-front reconstruction from multidirectional phase derivatives generated by multilateral shearing interferometers. , 2005, Optics letters.