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

GAO Huai-Lin; WANG Nai-Yan; SHAN Yu-Sheng

Chinese Physics C> 2005, Vol. 29> Issue(1) : 99-103

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

Institute of Electronics,CAS,Beijing 100080,China2 China Institute of Atomic Energy,Beijing 102413,China

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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.

References

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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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沈阳化工大学材料科学与工程学院沈阳 110142

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

Received Date: 2004-06-08
Accepted Date: 2004-07-15
Available Online: 2005-01-05

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.