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Method for the production of Gaussian intensity distributions in the beam profile of radiation generated by non-linear optical processes
Method for the production of Gaussian intensity distributions in the beam profile of radiation generated by non-linear optical processes
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机译:在非线性光学过程产生的辐射束轮廓中产生高斯强度分布的方法
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摘要
A method for the production of Gaussian intensity distribution in the beam profile of secondary radiation generated by non-linear optical processes, particularly frequency conversion and more particularly frequency doubling of a primary radiation beam. The non-linearly generated, secondary radiation beam is non-Gaussian in profile due to the walk-off effect and has a near field path near the non-linear optical material and a transition field path interconnecting the near field path with a remote, or far, field path. A Gaussian secondary beam profile of substantially circular cross-section is produced at a finite distance from the optical material by providing an optical system in the transition path which, taken as a whole, has no divergence altering or imaging effect on the secondary radiation beam.
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