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Submegahertz frequency-stabilized Nd:YAG oscillator.

Y L Sun, R L Byer

|August 29, 2009

Summary

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We developed a pulsed single-frequency Neodymium-doped Yttrium Aluminum Garnet (Nd:YAG) oscillator. This advanced laser system operates at 10 Hz with a narrow frequency bandwidth for precise applications.

Area of Science:

Optics and Photonics
Laser Physics
Materials Science

Background:

Pulsed lasers are crucial for various scientific and industrial applications.
Achieving single-frequency operation in pulsed lasers presents significant technical challenges.
Neodymium-doped Yttrium Aluminum Garnet (Nd:YAG) lasers are widely used due to their robust performance.

Purpose of the Study:

To demonstrate a novel pulsed single-frequency Nd:YAG oscillator.
To achieve a narrow frequency bandwidth for enhanced spectral purity.
To explore the capabilities of quasi-continuous-wave (quasi-cw) operation at a specific repetition rate.

Main Methods:

Utilized a pulsed single-frequency Nd:YAG laser architecture.
Implemented a quasi-continuous-wave (quasi-cw) operational mode.

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Employed feedback stabilization techniques to control laser frequency.

Measured the laser output characteristics, including pulse duration and repetition rate.

Characterized the frequency bandwidth of the single-frequency output.

Main Results:

Successfully demonstrated a 5-millisecond (msec) pulse duration.
Achieved a 10-Hertz (Hz) repetition rate for the pulsed output.
Attained single-frequency operation of the Nd:YAG oscillator.
The feedback-stabilized frequency bandwidth was measured to be less than 200 kilohertz (kHz).

Conclusions:

The developed Nd:YAG oscillator meets the requirements for high-spectral-purity pulsed laser applications.
The achieved narrow frequency bandwidth is a significant advancement for precise laser spectroscopy and other demanding fields.
The quasi-cw 10-Hz operation demonstrates a viable configuration for specific pulsed laser requirements.