High peak power sub-nanosecond 2.1 μm Raman generator

Area of Science:

• Laser Physics
• Nonlinear Optics

Background:

• 2.1 μm lasers are crucial for various applications.
• Previous research focused on nanosecond pulse durations, limiting peak power.

Purpose of the Study:

• To develop a novel method for generating high peak power, sub-nanosecond 2.1 μm lasers.
• To optimize experimental parameters for enhanced laser performance.

Main Methods:

• Utilized a 1064 nm laser (491 ps pulse width) to pump high-pressure nitrogen.
• Generated a 2111 nm Raman laser (second Stokes, S2).
• Systematically optimized experimental parameters.

Main Results:

• Achieved a maximum output energy of 67.9 mJ at 2111 nm.
• Estimated pulse width narrower than 387 ps.
• Exceeded 175.5 MW peak power with good beam quality (Mx²=2.82, My²=2.96).

Conclusions:

• Presented a novel approach for high peak power, sub-nanosecond 2.1 μm laser generation.
• Demonstrated good beam quality in the generated laser output.
• This method offers a promising alternative for advanced laser applications.