Multi-grid parallel ptychographic algorithm for frequency-resolved optical gating

The ptychographic reconstruction algorithm is a commonly utilized method for pulse phase retrieval due to its super-resolution and robustness, allowing it to retrieve pulses from incomplete traces. However, the algorithm's performance can be hindered by occasional convergence stagnation caused by local minima in the gradient descent strategy. To address this issue, we propose a pulse reconstruction approach for frequency-resolved optical gating (FROG), which employs a multi-grid flexible sampling and parallel extended ptychographic iterative engine (ePIE), ultimately converging to the global FROG trace. The approach can effectively escape from the local minima and demonstrates extremely stable convergence without any prior information. We demonstrate, numerically and experimentally, that this approach can converge well to the correct pulse, especially for complex pulse reconstruction, even in cases of high noise and highly incomplete traces.

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Publication Details

Journal
Optics Express
Published
2025-02-12
DOI
https://doi.org/10.1364/oe.543471
Citations
2
Primary Topic
Advanced X-ray Imaging Techniques
Type
article
Field-Weighted Citation Impact
3.77

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article

Multi-grid parallel ptychographic algorithm for frequency-resolved optical gating

Fucai Ding, Y. Yi, Zezhao Gong, Rick P. Trebino et al.
2 citations
Optics Express
Advanced X-ray Imaging Techniques
3.77
article

Multi-grid parallel ptychographic algorithm for frequency-resolved optical gating

Fucai Ding, Y. Yi, Zezhao Gong, Rick P. Trebino, Dongjun Zhang, Ping Zhu, Xiaoping Ouyang, Xinglong Xie, Jianqiang Zhu, Rana Jafari, Xuejie Zhang
article en
2 citations

Abstract

The ptychographic reconstruction algorithm is a commonly utilized method for pulse phase retrieval due to its super-resolution and robustness, allowing it to retrieve pulses from incomplete traces. However, the algorithm's performance can be hindered by occasional convergence stagnation caused by local minima in the gradient descent strategy. To address this issue, we propose a pulse reconstruction approach for frequency-resolved optical gating (FROG), which employs a multi-grid flexible sampling and parallel extended ptychographic iterative engine (ePIE), ultimately converging to the global FROG trace. The approach can effectively escape from the local minima and demonstrates extremely stable convergence without any prior information. We demonstrate, numerically and experimentally, that this approach can converge well to the correct pulse, especially for complex pulse reconstruction, even in cases of high noise and highly incomplete traces.

Optics ExpressVol. 33(5)
Georgia Institute of Technology (US), University of Chinese Academy of Sciences (CN)
National Natural Science Foundation of China, Chinese Academy of Sciences, Ministry of Science and Technology of the People's Republic of China, Science and Technology Commission of Shanghai Municipality
Openalex Percentile: Top 10%
Advanced X-ray Imaging Techniques
3.77
DOIOpen Access PDFOpenAlex
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