Temporal ghost imaging with pseudo-thermal speckle light

TL;DR

This paper demonstrates a method for ghost imaging of fast, non-reproducible temporal signals using pseudo-thermal speckle light and a high-resolution detector array, enabling temporal information retrieval through spatial correlation analysis.

Contribution

The authors introduce a novel ghost imaging technique that captures and reconstructs rapid temporal signals without requiring temporal resolution in the detector.

Findings

Successfully imaged signals at tens of kHz frequency.

Achieved temporal reconstruction using spatial intensity correlations.

Utilized a single detector array with a million pixels.

Abstract

We report ghost imaging of a single non-reproducible temporal signal in the range of tens kHz by using pseudo-thermal speckle light patterns and a single detector array with a million of pixels working without any temporal resolution. A set of speckle patterns is generated deterministically at radio-frequency rate, multiplied by the temporal signal and time integrated in a single shot by the camera. The temporal information is retrieved by computing the spatial intensity correlations between this time integrated image and each speckle pattern of the set.