Influence of the delay line jitter on the SHG FROG reconstruction

0544111 - ÚFP 2022 RIV US eng J - Článek v odborném periodiku
Veselá, Petra - Žídek, Karel
Influence of the delay line jitter on the SHG FROG reconstruction.
Optics Express. Roč. 29, č. 3 (2021), s. 4392-4404. ISSN 1094-4087
Grant CEP: GA MŠMT(CZ) EF16_026/0008390
Grant ostatní: AV ČR(CZ) ERC100431901
Program: ERC-CZ/AV
Institucionální podpora: RVO:61389021
Klíčová slova: delay line jitte * SHG FROG reconstruction
Obor OECD: Optics (including laser optics and quantum optics)
Impakt faktor: 3.833, rok: 2021
Způsob publikování: Open access
https://www.osapublishing.org/oe/fulltext.cfm?uri=oe-29-3-4392&id=446974

Frequency-resolved optical gating (FROG) counts among the most used methods to characterize complex femtosecond pulses. The multishot FROG experiment, studied in this work, relies on varying a delay between two replicas of the measured pulse, where the delay accuracy can suffer from delay line imperfections, setup instability, or minimization of the acquisition time. We present a detailed study on the effect of the delay line jitter on the pulse retrieval. We carried out simulations with the jitter values ranging from high-precision delay lines (100 nm) up to extremely unstable measurements (>1000 nm). For three sets of pulses, we quantified criteria assuring reliable reconstruction, using ptychographic algorithm, of a complex pulse based on the experimentally available FROG trace error. We observe that the effect of the jitter scales together with the spectral bandwidth. However, the pulse reconstruction is relatively robust against the jitter and, even for a severe distortion of the FROG trace (e.g., a jitter of 500 nm for broadband pulses), the main features of all pulses are retrieved with high fidelity. Our results provide guidance for the limitations based on the delay imperfections in the FROG experiment.
Trvalý link: http://hdl.handle.net/11104/0321164