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Multiple-reflections single-shot dispersion scan for fast ultrashort-pulse measurements
Optics Express
|November 14, 2024
Summary
A new multiple-reflections dispersion scan (MR d-scan) technique extends ultrashort-pulse measurement capabilities. This method accurately characterizes both short and long femtosecond pulses, overcoming limitations of traditional dispersion scan methods.
Area of Science:
- Optics and Photonics
- Ultrafast Laser Science
Background:
- Traditional single-shot dispersion scan (d-scan) is limited to measuring shorter femtosecond pulses.
- Existing methods struggle with pulse durations exceeding 60 fs due to dispersion limitations.
Purpose of the Study:
- To present a novel multiple-reflections dispersion scan (MR d-scan) technique.
- To extend the capability of single-shot ultrashort-pulse measurement to longer durations.
- To enable accurate characterization of both short and long femtosecond pulses.
Main Methods:
- Implementation of a multiple-reflections d-scan (MR d-scan) technique.
- Utilizing commonly available output couplers for an in-line configuration.
- Achieving significantly increased group delay dispersion (GDD) up to 31100 fs².
Main Results:
- MR d-scan successfully measures and reconstructs long femtosecond double pulses.
- The technique extends the measurable pulse duration range substantially beyond conventional d-scan.
- Achieved GDD is significantly higher than standard d-scan, enabling measurement of longer pulses.
Conclusions:
- MR d-scan offers a versatile and extended capability for ultrashort-pulse characterization.
- The method is robust, not requiring precise beam profiles or customized nonlinear crystals.
- This advancement facilitates detailed analysis of complex femtosecond pulse structures.
