Abstract
Alignment studies on tiled grating assembly (TGA), using pulsed spectrally broadband intra-beam, are reported for tiled grating pulse disperser of a chirped pulse amplification based high energy laser system. Spatial and spectrally resolved far-field profilometry coupled with spatio-spectral interferometry have been used to obtain quantitative values of tip, tilt, in-plane rotation, and piston without ambiguity. Prior to application of present diagnostic setup for coherent phase locking of TGA, point diffractometry has been used for coarse alignment of TGA. Experiment has been carried out using a cw mode-locked femtosecond laser oscillator delivering 200 fs duration laser pulses at 1056 nm. Experimental setup has also been used to estimate groove-density mismatch of gratings for operation and maintenance situations requiring replacement of any grating.
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Sharma, A.K. A simple intra-beam alignment setup for tiled grating assembly based laser pulse compressor of high energy ultrashort pulse laser systems. Sādhanā 48, 121 (2023). https://doi.org/10.1007/s12046-023-02170-8
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DOI: https://doi.org/10.1007/s12046-023-02170-8