Abstract
Slight non-parallelism of the gratings in the compressor of a chirped-pulse amplification laser system produces angular chirp which results in a significant reduction of the focused intensity due to elongation of the pulse duration and enlargement of the focal spot. The effect of three-dimensional relative misalignment angles between two gratings on the far-field pattern of the pulses propagating through them is investigated by ray tracing. The far-field pattern provides two-dimensional information of the uncompensated angular dispersion directly. A simple and intuitive alignment procedure to achieve parallelism of the compression gratings by far-field monitoring is demonstrated experimentally, while the alignment precision is found to be the same as the methods proposed previously.
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Liu, F., Liu, X.L., Wang, Z.H. et al. Compression grating alignment by far-field monitoring. Appl. Phys. B 101, 587–591 (2010). https://doi.org/10.1007/s00340-010-4237-x
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DOI: https://doi.org/10.1007/s00340-010-4237-x