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Diode-pumped 100-W green Nd:YAG rod laser
Jonghoon Yi1, Hee-Jong Moon, Jongmin Lee
1Department of Physics, Yeungnam University, 214-1 Dae-Dong, Kyungsan, 712-749, Korea. jhyi@yu.ac.kr
Applied Optics
|June 29, 2004
Summary
We developed a high-power green laser using neodymium-doped yttrium aluminum garnet (Nd:YAG). This laser achieved 101 W of green power with 25.4% efficiency, overcoming thermal issues for stable performance.
Area of Science:
- Optics and Photonics
- Laser Physics
- Materials Science
Background:
- High-power green lasers are crucial for various applications.
- Thermal lensing and birefringence in laser rods limit performance.
- Efficient power conversion is essential for practical laser systems.
Purpose of the Study:
- To develop a diode-pumped high-average-power Nd:YAG green laser.
- To mitigate thermal effects for improved laser stability and efficiency.
- To analyze laser performance characteristics under varying pump power.
Main Methods:
- Utilized a monolithic diffusive reflector with three slits for uniform excitation.
- Employed a low-doping concentration Nd:YAG rod to reduce thermal birefringence.
- Implemented a Z-shaped cavity to maintain constant beam size at the frequency-doubling crystal.
- Analyzed pulse width and green power as functions of pump power.
Main Results:
- Achieved a maximum green power output of 101 W with 398 W of total pump power.
- Attained a high optical-to-optical conversion efficiency of 25.4%.
- Demonstrated reduced thermal birefringence due to uniform excited ion distribution.
Conclusions:
- The developed Nd:YAG green laser system demonstrates high power and efficiency.
- The integrated design effectively suppresses thermal lensing and birefringence.
- This work offers a pathway for scalable, high-performance green laser sources.