Beyond Young's experiment: time-domain correlation measurement in a pinhole array.

Area of Science:

• Optics and Photonics
• Quantum Optics
• Interferometry

Background:

• Understanding light coherence is crucial in optics.
• Young's two-pinhole experiment is a foundational demonstration of wave interference.
• Characterizing spatial-temporal coherence requires advanced measurement techniques.

Purpose of the Study:

• To perform time-domain analysis of field correlations.
• To demonstrate a single measurement's equivalence to multiple Young's two-pinhole experiments.
• To sample the spatial-temporal coherence function of a light source.

Main Methods:

• Utilizing an interferogram generated by a nonredundant pinhole array.
• Conducting time-domain analysis of the field correlations.
• Implementing post-measurement analysis accounting for finite source coherence time.

Main Results:

• A single measurement with a nonredundant pinhole array is equivalent to a series of Young's two-pinhole experiments.
• The spatial-temporal coherence function can be sampled.
• The finite coherence time of the source is a critical factor in the analysis.

Conclusions:

• Nonredundant pinhole arrays offer an efficient method for coherence measurements.
• This technique simplifies the process of characterizing spatial-temporal coherence.
• The findings advance the understanding of light-field correlations and coherence properties.