Femtosecond two-color source synchronized at 100-as-precision based on SPM-enabled spectral selection

Area of Science:

• Optics and Photonics
• Ultrafast Laser Science
• Nonlinear Optics

Background:

• Achieving precise synchronization of ultrashort laser pulses is critical for many scientific experiments.
• Existing methods, such as those using Raman soliton pulses, have limitations in synchronization precision.
• Developing new techniques for highly synchronized ultrafast sources is an ongoing research area.

Purpose of the Study:

• To demonstrate a novel method for generating wavelength-tunable, energetic pulses with exceptional temporal synchronization.
• To compare the synchronization performance of the new method against established techniques.
• To highlight the suitability of the developed ultrafast two-color source for demanding applications.

Main Methods:

• Numerical simulations and experimental validation of self-phase modulation (SPM) for spectral selection.
• Generation of wavelength-tunable energetic pulses.
• Quantification of relative timing jitter using interferometric techniques.

Main Results:

• Self-phase modulation enabled spectral selection successfully generated tunable energetic pulses.
• The generated pulses exhibited tight synchronization with excitation pulses.
• Relative timing jitter was measured at the 100-attosecond (as) precision level.
• This precision is at least 10 times superior to that achieved with Raman soliton pulses.

Conclusions:

• Self-phase modulation is a powerful technique for generating highly synchronized ultrafast laser pulses.
• The developed method provides a significant advancement in pulse synchronization precision.
• The ultrafast two-color source is well-suited for applications demanding precise pulse timing.