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1 kHz, 430 mJ, sub-nanosecond MOPA laser system
Optics Express
|July 16, 2021
Summary
This study presents a high-energy, sub-nanosecond master oscillator power amplifier (MOPA) laser system. The optimized laser system achieves high pulse energy and excellent beam quality for diverse applications.
Area of Science:
- Laser Physics
- Optical Engineering
Background:
- Master oscillator power amplifier (MOPA) systems are crucial for high-power laser generation.
- Nd:YAG lasers offer robust performance for various scientific and industrial applications.
Purpose of the Study:
- To develop and characterize a sub-nanosecond MOPA system at 1.06 µm.
- To achieve high pulse energy and excellent beam quality for advanced applications.
Main Methods:
- Utilized an integrated seed source with 6.2 mJ pulse energy.
- Employed two conductively cooled end-pumped Nd:YAG slab gain modules.
- Implemented 4-pass and double-pass amplification stages with specific gain factors.
Main Results:
- Achieved a maximum pulse energy of 434 mJ with a pulse duration of 691 ps.
- Obtained a peak power of 628 MW.
- Optimized beam quality to 2.5 mm·mrad (vertical) and 2.2 mm·mrad (transverse) by adjusting pump distribution.
Conclusions:
- Demonstrated a high-performance sub-nanosecond MOPA system.
- The optimized laser system is suitable for material processing, nonlinear frequency conversion, and lidars.
