FISI: frequency domain integration sequential imaging at 1.26×1013 frames per second and 108 lines per millimeter

Author:

Zhu Qifan1ORCID,Cai Yi1ORCID,Zeng Xuanke1,Long Hu1ORCID,Chen Hongyi1,Zeng Liangwei1ORCID,Zhu Yongle,Lu Xiaowei,Li JingzhenORCID

Affiliation:

1. Shenzhen University

Abstract

High spatial resolution on the image plane (intrinsic spatial resolution) has always been a problem for ultrafast imaging. Single-shot ultrafast imaging methods can achieve high spatial resolution on the object plane through amplification systems but with low intrinsic spatial resolutions. We present frequency domain integration sequential imaging (FISI), which encodes a transient dynamic by an inversed 4f (IFF) system and decodes it using optical spatial frequencies recognition (OFR), which overcomes the limitation of the spatial frequencies recognition algorithm. In an experiment on the process of an air plasma channel, FISI achieved shadow imaging of the channel with a framing rate of 1.26×1013 fps and an intrinsic spatial resolution of 108 lp/mm (the spatial resolution on the image plane). Owing to its excellent framing time and high intrinsic spatial resolution, FISI can probe both repeatable and unrepeatable ultrafast phenomena, such as laser-induced damage, plasma physics, and shockwave interactions in living cells with high quality.

Funder

National Natural Science Foundation of China

Natural Science Foundation of Guangdong Province

Shenzhen Fundamental Research Program

Publisher

Optica Publishing Group

Subject

Atomic and Molecular Physics, and Optics

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