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首页> 外文期刊>Journal of Micro/Nanolithography,MEMS and MOEMS >Interferometric adaptive optics for high-power laser pointing and wavefront control and phasing
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Interferometric adaptive optics for high-power laser pointing and wavefront control and phasing

机译：干涉式自适应光学元件，用于大功率激光指向，波前控制和定相

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Implementing the capability to perform fast ignition experi-nments, as well as, radiography experiments on the National Ignition Fa-ncility u0001NIFu0002 places stringent requirements on the control of each of thenbeam’s pointing and overall wavefront quality. One quad of the NIFnbeams, four beam pairs, will be utilized for these experiments and hy-ndrodynamic and particle-in-cell simulations indicate that for the fast igni-ntion experiments, these beams will be required to deliver 50% u00014.0 kJu0002 ofntheir total energy u00017.96 kJu0002 within a 40-u0001m-diam spot at the end of a fastnignition cone target. This requirement implies a stringent pointing andnoverall phase conjugation error budget on the adaptive optics systemnused to correct these beam lines. The overall encircled energy require-nment is more readily met by phasing of the beams in pairs but still re-nquires high Strehl ratios and root-mean-square tip/tilt errors of approxi-nmately 1 u0001rad. To accomplish this task we have designed anninterferometric adaptive optics system capable of beam pointing, highnStrehl ratio, and beam phasing with a single pixilated microelectrome-nchanical systems deformable mirror and interferometric wavefront sen-nsor. We present the design of a testbed used to evaluate the perfor-nmance of this wavefront sensor along with simulations of its expectednperformance level
机译：在国家点火设施u0001NIFu0002上执行快速点火实验的能力以及射线照相实验对控制每个光束的指向和整体波前质量提出了严格的要求。 NIF光束的四分之一，四个光束对将用于这些实验，并且水动力和单元内粒子模拟表明，对于快速点火实验，将要求这些光束提供50％的u00014.0 kJu0002在点火锥靶末端40-u0001m直径点内的总能量u00017.96 kJu0002。该要求意味着在用于校正这些光束线的自适应光学系统上存在严格的指向和总体相位共轭误差预算。通过成对定相光束可以更轻松地满足整体环绕的能量需求，但仍然需要较高的斯特列尔比和均方根倾斜度/倾斜度误差，近似为1 u0001rad。为了完成该任务，我们设计了一种干涉式自适应光学系统，该系统能够通过单个像素化微机电系统，可变形镜面和干涉波前传感器来实现光束指向，高nStrehl比和光束定相。我们介绍了用于评估该波前传感器性能的测试台的设计以及其预期性能水平的模拟

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