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Journal Article

Attosecond stable dispersion-free delay line for easy ultrafast metrology

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Pfeifer,  Thomas
Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society;

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Citation

Tyagi, A., Sidhu, M. S., Mandal, A., Kapoor, S., Dahiya, S., Rost, J. M., et al. (2022). Attosecond stable dispersion-free delay line for easy ultrafast metrology. Scientific Reports, 12(1): 8525. doi:10.1038/s41598-022-12348-5.


Cite as: https://hdl.handle.net/21.11116/0000-000A-E76E-7
Abstract
We demonstrate a dispersion-free wavefront splitting attosecond resolved interferometric delay line for easy ultrafast metrology of broadband femtosecond pulses. Using a pair of knife-edge prisms, we symmetrically split and later recombine the two wavefronts with a few tens of attosecond resolution and stability and employ a single-pixel analysis of interference fringes with good contrast using a phone camera without any iris or nonlinear detector. Our all-reflective delay line is theoretically analyzed and experimentally validated by measuring 1st and 2nd order autocorrelations and the SHG-FROG trace of a NIR femtosecond pulse. Our setup is compact, offers attosecond stability with flexibility for independent beam-shaping of the two arms. Furthermore, we suggest that our compact and in-line setup can be employed for attosecond resolved pump-probe experiments of matter with few-cycle pulses.