Experimental Investigations on the Resonator Mirrors of SR-FEL and ICF KrF Laser

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GAO Huai-Lin, WANG Nai-Yan and SHAN Yu-Sheng. Experimental Investigations on the Resonator Mirrors of SR-FEL and ICF KrF Laser[J]. Chinese Physics C, 2005, 29(1): 99-103.
GAO Huai-Lin, WANG Nai-Yan and SHAN Yu-Sheng. Experimental Investigations on the Resonator Mirrors of SR-FEL and ICF KrF Laser[J]. Chinese Physics C, 2005, 29(1): 99-103. shu
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Received: 2004-06-08
Revised: 2004-07-15
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Experimental Investigations on the Resonator Mirrors of SR-FEL and ICF KrF Laser

    Corresponding author: GAO Huai-Lin,
  • Institute of Electronics,CAS,Beijing 100080,China2 China Institute of Atomic Energy,Beijing 102413,China

Abstract: For storage–ring free electron laser (SR-FEL) and KrF laser driver of inertial confinement fusion(ICK KrF Laser), the mechanism of laser production is fully different from each other, but they have a nearly same requirement to the resonator mirror. The multi–layer interference coatings of the resonator mirror must suit for ultra–violet and extreme ultra–violet laser, and have a high reflectivity, wide frequency band, stable optical properties, long life–time. Today, a resonator mirror, consisting of oxides and fluoride (al2O3/SiO2/MgF2),has been developed successfully.Its optical reflectivity at 248nm reaches up to 96.83%, its frequency band–width is larger than 19.5nm, and its damage–resistant threshold is (5.36±0.30)J/cm2 to 23ns pulsed laser at 248nm. It will be able to be applied to the tunable high power SR-FEL and kJ ICF Krf laser.

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