- Conference date: 16–21 October 2009
- Location: Brasov (Romania)
This paper reports the recent progresses on the XL‐III facility by using a new front‐end stage and increasing the gain efficiency in the final amplifier. An improved scheme of double chirped pulse amplification (DCPA) with a long cavity ring regenerative amplifier and technique of cross‐polarized wave generation (XPW) was used. Pumped the finial stage with 110J laser energy at 527 nm, the 800 nm chirped laser was boosted to the energy of 45 J by efficiently eliminating the paralasing. After optimized alignment the compressors combined with a far‐filed monitor, we obtained the pulse duration of 31fs and contrast ratio of about in the preliminary measurement, beam was focused to a spot of about 25 μm with a f/10 OAP. Considered the throughout of the compressor, it promises a peak power of around 1 PW.
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