2.5 TW, two-cycle IR laser pulses via frequency domain optical parametric amplification

Area of Science:

• Non-linear optics
• Ultrafast lasers
• Infrared (IR) technology

Background:

• Broadband optical parametric amplification (OPA) is crucial for generating tunable IR light.
• Scaling peak power in OPA systems is essential for advanced scientific applications.
• Existing OPA systems face limitations in achieving ultra-high peak powers with ultrashort pulses.

Purpose of the Study:

• To report a novel non-collinear Frequency domain Optical Parametric Amplification (FOPA) system.
• To demonstrate a high-energy, ultrashort pulse laser source in the IR region.
• To explore the potential of this source for generating high flux soft X-ray pulses and driving laser wakefield acceleration.

Main Methods:

• Utilized a non-collinear FOPA system for broadband amplification in the IR.
• Generated 11.6 fs pulses with 30 mJ energy at a 1.8 μm central wavelength.
• Operated the system at a 10 Hz repetition rate, achieving 2.5 TW peak power.

Main Results:

• Achieved a record peak power of 2.5 TW for the IR laser source.
• Demonstrated pulse shortening of approximately 20% upon amplification due to spectral reshaping.
• Observed higher gain in the spectral wings, contributing to pulse characteristics.

Conclusions:

• The developed non-collinear FOPA system represents a significant advancement in IR amplification.
• The high peak power, ultrashort pulse source opens new avenues for ultrafast science.
• This technology is poised to enable breakthroughs in soft X-ray generation and laser-driven particle acceleration.