储存环自由电子激光器与KrF激光器激光谐振腔腔镜研制  

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

作　　者：高怀林[1] 王乃彦 单玉生 

机构地区：[1]中国科学院电子学研究所,北京100080 [2]中国原子能科学技术研究院,北京102413

出　　处：《高能物理与核物理》2005年第1期99-103,共5页High Energy Physics and Nuclear Physics

基　　金：国家高技术研究发展计划 (863 416 1);国家自然科学基金 (10 475 0 81);核工业科学基金资助~~

摘　　要：惯性约束核聚变氟化氪激光驱动器与储存环自由电子激光器 ,虽然其激光产生机理完全不同 ,但是它们对于激光谐振腔光学膜系的要求却几乎完全相同 .新研制的Al2 O3/SiO2 /MgF2 “双氧化物 +单氟化物”紫外光学膜系 ,在 2 4 8nm中心波长处 ,它的光学透射率测量值为 0 .2 7%— 0 .71% ,反射率的计算值为 96 .5 % ,其光谱带宽为 2 2 .6nm .在脉冲宽度为 2 3ns的KrF激光照射下 ,它的抗激光损伤阈值达到 (5 .36± 0 .30 )J/cm2 ,是可用于储存环紫外波长自由电子激光研究与数千焦耳数量级高能、高功率KrF激光驱动器研究的高破坏阈值紫外光学膜系 .For storage-ring free electron laser (SR-FEL) and KrF laser driver of inertial confinement fusion (ICF 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 248 nm reaches up to 96.83%, its frequency band-width is larger than 19.5 nm, and its damage-resistant threshold is (5.36 ± 0.30) J/cm to 23 ns pulsed laser at 248 nm. It will be able to be applied to the tunable high power SR-FEL and kJ ICF KrF laser.

关 键 词：激光谐振腔 自由电子激光器 KRF激光 破坏阈值 膜系 氟化氪 中心波长 光学 高能 光谱带宽 

分 类 号：TL631[核科学技术—核技术及应用]