Single-shot compressed optical field topography

Area of Science:

• Ultrafast optics
• Nonlinear optics
• Laser-matter interactions

Background:

• Femtosecond lasers probe ultrafast dynamics (fs-as).
• 3D topological mapping of optical fields is crucial for understanding light-matter interactions.
• Existing methods face challenges in capturing 3D field information (spatiotemporal amplitude and phase) in single-shot due to detector limitations.

Purpose of the Study:

• To develop a novel technique for single-shot 3D mapping of ultrafast optical fields.
• To overcome the limitations of current detectors in capturing phase information.
• To enable real-time characterization of light-matter interactions.

Main Methods:

• Integration of coded aperture snapshot spectral imaging (CASSI) with a global 3D phase retrieval algorithm.
• Development of Compressed Optical Field Topography (COFT).
• Single-shot acquisition of spatiotemporal optical field information.

Main Results:

• Successful demonstration of COFT for 3D mapping of ultrafast optical fields.
• Full characterization of femtosecond laser pulse spatiotemporal coupling.
• Live streaming of light-speed air plasma ionization front propagation.

Conclusions:

• COFT provides a powerful tool for comprehensive characterization of ultrafast optical fields.
• The technique facilitates the study of ultrafast phenomena, such as plasma dynamics.
• COFT opens new avenues for applications in ultrafast sciences.