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Monolithic Nd:YAG fiber laser.

J L Nightingale, R L Byer

|September 5, 2009

Summary

This summary is machine-generated.

A novel Neodymium-doped Yttrium Aluminum Garnet (Nd:YAG) fiber laser was developed as a monolithic, guided-wave oscillator. This compact laser achieved efficient operation, with most power in the fundamental spatial mode.

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Area of Science:

Materials Science
Optics and Photonics
Laser Physics

Background:

Neodymium-doped Yttrium Aluminum Garnet (Nd:YAG) is a widely used laser gain medium.
Miniaturization of laser systems is crucial for various applications.
Guided-wave laser oscillators offer potential for compact and efficient laser sources.

Purpose of the Study:

To demonstrate the operation of a monolithic, guided-wave laser oscillator using a single-crystal Nd:YAG fiber.
To characterize the performance of the Nd:YAG fiber laser in terms of threshold and efficiency.
To assess the spatial mode quality of the generated laser output.

Main Methods:

Fabrication of a single-crystal Nd:YAG fiber with specific dimensions (47-microm diameter, 7-mm length).

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Polishing and coating of the fiber endfaces to act as reflective surfaces.

Operation of the fiber as a monolithic, guided-wave laser oscillator.

Main Results:

The Nd:YAG fiber laser oscillator operated successfully with a low threshold power of 3.7 mW.
A slope efficiency of 10.5% was achieved, indicating good power conversion.
Seventy-five percent of the output laser power was concentrated in the fundamental spatial mode, signifying high beam quality.

Conclusions:

A monolithic, guided-wave Nd:YAG fiber laser oscillator can be effectively realized.
The developed fiber laser exhibits efficient performance and good spatial mode quality.
This technology holds promise for compact and high-performance laser sources.