Thin-tapered-rod Yb:YAG laser amplifier.

Area of Science:

• Laser physics
• Materials science
• Optical engineering

Background:

• Traditional thin-rod amplifiers face limitations in gain and thermal management.
• Waveguide pumping offers potential for improved laser amplification efficiency.

Purpose of the Study:

• To propose and implement a thin-tapered-rod Yb:YAG amplifier utilizing waveguide pumping.
• To evaluate its performance against conventional thin-rod amplifiers, focusing on gain and thermal effects.

Main Methods:

• Development and experimental implementation of a thin-tapered-rod Yb:YAG laser amplifier.
• Utilizing waveguide pumping as the excitation method.
• Comparative analysis of small signal gain and thermal behavior with thin-rod amplifiers.

Main Results:

• The thin-tapered-rod Yb:YAG amplifier demonstrated significantly higher small signal gain.
• The developed amplifier exhibited reduced susceptibility to thermal effects.
• A maximum small signal gain of 23 per pass was achieved.

Conclusions:

• The thin-tapered-rod Yb:YAG amplifier with waveguide pumping is a viable and effective design.
• This configuration surpasses traditional thin-rod amplifiers in both gain and thermal stability.
• The results pave the way for more efficient and robust laser amplifier systems.