Active pump-seed-pulse synchronization for OPCPA with sub-2-fs residual timing jitter

Area of Science:

• Physics
• Optics
• Laser Technology

Background:

• Stable performance in optical parametric chirped pulse amplification (OPCPA) relies on precise temporal overlap of short-pulse-pump and broadband seed pulses within the nonlinear crystal.
• Existing synchronization methods may not achieve the required precision for advanced OPCPA applications.

Purpose of the Study:

• To present an active synchronization technique for ps-pump and broadband seed pulses in OPCPA systems.
• To demonstrate a residual timing jitter below 2 fs for enhanced system stability.

Main Methods:

• Utilized optical parametric amplification to generate the error signal for synchronization.
• Implemented a system requiring minimal seed pulse energy (< 4 pJ) and pump pulse energy (10 µJ).

Main Results:

• Achieved active synchronization with a residual timing jitter below 2 fs.
• Demonstrated excellent long-term performance of the synchronization system.

Conclusions:

• The presented active synchronization method significantly enhances OPCPA stability.
• The system is robust, requires low pulse energies, and offers easy implementation in various OPCPA setups.