Nd:YAG oscillator amplifier system with a passive ring self-pumped phase-conjugate mirror

Area of Science:

• Optics and Photonics
• Laser Physics
• Materials Science

Background:

• Laser systems often suffer from optical aberrations that degrade beam quality.
• Phase-conjugate mirrors offer a potential solution for real-time aberration correction.

Purpose of the Study:

• To investigate the use of a self-pumped phase-conjugate mirror for aberration correction in a specific laser system.
• To evaluate the performance of rhodium-doped barium titanate as a phase-conjugate mirror material.

Main Methods:

• A ring self-pumped phase-conjugate mirror utilizing rhodium-doped barium titanate was implemented.
• The mirror was integrated into a laser-diode-pumped zigzag slab Neodymium-doped Yttrium Aluminum Garnet (Nd:YAG) oscillator-amplifier system.
• Aberrations within the laser system were corrected using the phase-conjugate mirror.

Main Results:

• The phase-conjugate mirror successfully corrected aberrations in the Nd:YAG laser system.
• A diffraction-limited output beam quality was achieved.
• The system delivered 360 mJ of energy per pulse with a 36-ns pulse duration.
• A repetition rate of 100 Hz was maintained.

Conclusions:

• Rhodium-doped barium titanate is an effective material for self-pumped phase-conjugate mirrors.
• This approach significantly improves beam quality in laser oscillator-amplifier systems.
• The demonstrated system shows promise for high-power, high-quality laser applications.