Strategic Study of CAE >> 2009, Volume 11, Issue 8
The shape control over the front-end of excimer laser beam
Northwest Institute of Nuclear Technology, Xi'an 710024, China
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Abstract
In high power excimer laser system, the shape of output laser beam from whole system is mainly determined by the front-end of laser beam, and is closely correlated to the requirement of target physics. The experimental development of the front-end laser beam shape control based on a short pulse excimer laser is described. A partial coherence scattering source satisfying requirement of system construction has been developed, and the top-hat laser shaping pulse by three pulses stacking has been obtained. Also, analysis on above methods combining experimental results is given
Keywords
excimer laser ; beam smoothing ; uniformity ; pulse shaping ; high power
References
[ 1 ] Rosocha L A, Hanlon J A, McLeod J,et al.Aurora multikilojoule KrF laser system prototype for inertial confinement fusion[ J] .Fu- sion Technology, 1987 , 11 :497 -531 link1
[ 2 ] Myers M, Sethian J D, Giulian J L, et al.Repetitively pulsed, high energy KrF lasers for inertial fusion energy[ J] .Nuclear Fu- sion, 2004 , 44 :247 -253 link1
[ 3 ] 吕百达.强激光的传输与控制[M].北京:国防工业出版社,1999:274-311
[ 4 ] Lehmberg R H, Goldhar J.Use of incoherence to produce smooth and controllable irradiation profiles with KrF fosion lasers[ J] .Fu- sion Technology, 1987 , 11 :532 -541
[ 5 ] Obenschain S P, Bondner S E, Colombant D, et al.The Nike KrF laser facility: performance and initial target experiments [ J] . Phys Plasmas, 1996 , 3 ( 5 ) :2098 -2107 link1
[ 6 ] 王双义,吕志伟,林殿阳,等.KrF激光的脉冲整形研究[J].强激光与粒子束,2005,17(11):1669-1673 link1
[ 7 ] Lehmberg R H, Obenschain S P.Use of induced spatial incoher- ence for uniform illumination of laser fusion targes [ J ] .Optics Comm, 1983 ,46 ( 1 ) :27 -31 link1
[ 8 ] Frantz L M, Nodvik J S.Theory of pulse propagation in a laser amplifier[ J] .J Appl Phys,1963 ,34 :2346 -2349 link1
[ 9 ] 向益淮,单玉生,龚堃,等.高功率KrF准分子激光光束平滑实验技术研究[J].原子能科学与技术,2003,37(2):101-105
[10] 赵学庆,谢永杰,袁孝,等.部分相干源实验研究[J].强激光与粒子束,2002,14(3):408-410 link1
[11] Rice J K, Tisone G C, Patterson E L.Oscillator performance and energy extraction from a KrF laser pumped by a high -inten- sity relativistic electron beam [ J] .IEEE J.Quantum Electron, 1980 , 16 :1315 -1326 link1
[12] Hunter A M, Hunter R O.Bidirectional amplification with non- saturable absorption and amplified spontaneous emission [ J ] . IEEE J.Quantum Electron, 1981 , 17 :1879 -1887 link1