Optical cross-correlator based on supercontinuum generation

Area of Science:

• Optics and Photonics
• Ultrafast Laser Science

Background:

• Accurate temporal characterization of ultrashort laser pulses is crucial for many scientific applications.
• Conventional third-order cross-correlators can suffer from "ghost" artifacts, limiting their precision.
• A need exists for robust methods applicable to a wide range of laser pulse wavelengths.

Purpose of the Study:

• To develop and present a novel cross-correlator for the temporal characterization of femtosecond laser pulses.
• To demonstrate a method that minimizes artifacts compared to traditional techniques.
• To provide a versatile tool for analyzing laser pulses across a broad spectral range.

Main Methods:

• Development of a novel cross-correlator employing a single, high-contrast sampling pulse.
• Generation of the sampling pulse via femtosecond white-light generation in a line focus.
• Implementation of both scanning and single-shot experimental arrangements for data acquisition.

Main Results:

• The developed cross-correlator effectively samples the structure of femtosecond laser pulses.
• The technique significantly reduces "ghost" artifacts compared to conventional third-order cross-correlators.
• The system demonstrates applicability to laser pulses spanning a wide wavelength range.

Conclusions:

• The novel cross-correlator offers a superior method for temporal characterization of femtosecond laser pulses.
• Reduced artifacts and broad wavelength compatibility make this a valuable tool for ultrafast science.
• The described experimental arrangements provide flexibility for various measurement scenarios.