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Diode-laser-pumped Nd:YAG laser injection seeding system.

R L Schmitt¹, L A Rahn

¹Sandia National Laboratories, Combustion Research Facility, Livermore, California 94550, USA.

|March 1, 1986

Summary

A new compact injection seeding system using a diode-laser-pumped Nd:YAG master oscillator enables reliable single-axial-mode operation for Q-switched lasers. This versatile system can seed both stable and unstable resonators, including commercial lasers with minor adjustments.

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Area of Science:

Optics and Photonics
Laser Physics
Materials Science

Background:

Injection seeding is crucial for achieving single-mode operation in pulsed lasers.
Nd:YAG lasers are widely used in various scientific and industrial applications.
Existing injection seeding systems can be complex and costly.

Purpose of the Study:

To design and test a compact and reliable injection seeding system for Q-switched Nd:YAG lasers.
To achieve stable single-axial-mode operation over extended periods.
To demonstrate the system's compatibility with different resonator designs.

Main Methods:

Development of a compact system with a diode-laser-pumped Nd:YAG master oscillator.
Integration of a permanent-magnet Faraday isolator.

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Implementation of active resonator frequency stabilization.

Testing with both stable and unstable resonator configurations.

Main Results:

Achieved highly reliable single-axial-mode operation of a Q-switched Nd:YAG laser.
Demonstrated stable operation for several hours.
Confirmed the system's capability to seed both stable and unstable resonators.
Showcased suitability for seeding commercial lasers with minor modifications.

Conclusions:

The developed compact injection seeding system offers a reliable solution for single-axial-mode operation.
The system's versatility makes it adaptable to various laser resonator designs.
This technology can enhance the performance of commercial Q-switched Nd:YAG lasers.