Single-scan, dual-functional interferometer for fast spatio-temporal characterization of few-cycle pulses

Area of Science:

• Strong-field laser science and technology
• Ultrafast optics
• Nonlinear optics

Background:

• Characterizing spatio-temporal information of ultrashort pulses is vital for strong-field laser science.
• Conventional methods using self-referenced interferometers require multiple measurements, increasing system complexity.
• Retrieving the full spatial profile of the relative spectral phase often necessitates additional temporal and spectral data.

Purpose of the Study:

• To develop an advanced, dual-functional interferometer for complete spatio-temporal characterization of ultrashort laser pulses.
• To simplify the measurement process by reducing the need for multiple, complex diagnostic tools.
• To enable fast and accurate 3D reconstruction of few-cycle laser pulses.

Main Methods:

• Integration of an interferometric frequency-resolved optical gating (FROG) with a radial shearing Michelson interferometer.
• Simultaneous acquisition of cross-correlated FROG traces and delay-dependent interferograms through a single scan of an interferometer arm.
• Utilizing the combined data for comprehensive spatio-temporal reconstruction.

Main Results:

• The dual-functional interferometer successfully reconstructs the complete spatio-temporal information of ultrashort pulses.
• A single scan provides both FROG traces and interferograms, streamlining data acquisition.
• Demonstrated fast three-dimensional reconstruction of few-cycle laser pulses is achieved.

Conclusions:

• The developed interferometer offers a simplified and efficient solution for ultrashort pulse characterization.
• This advancement is significant for applications in strong-field laser science and technology.
• The system enables rapid and accurate analysis of complex laser pulse dynamics.