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High-efficiency 1.06-µm output in a monolithic Nd:YVO(4) laser.

R Scheps, J F Myers, G Mizell

|October 12, 2010

Summary

A miniature neodymium-doped yttrium orthovanadate (Nd:YVO4) laser achieved high output power. Thermal effects impacted performance, necessitating active cooling for optimal laser operation.

Area of Science:

Optics and Photonics
Laser Physics
Materials Science

Background:

Miniature solid-state lasers are crucial for various applications.
Neodymium-doped yttrium orthovanadate (Nd:YVO4) is a promising gain medium.
End-pumped configurations offer high efficiency.

Purpose of the Study:

To develop and characterize a miniature monolithic Nd:YVO4 laser.
To investigate performance under Ti-sapphire laser pumping.
To explore laser diode pumping and thermal effects.

Main Methods:

Fabrication of a 1.5-mm-long monolithic Nd:YVO4 laser crystal with 3 at.% Nd doping.
End-pumped configuration using a Ti-sapphire laser.
Evaluation of output power, slope efficiency, and pump polarization dependence.

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Demonstration of laser diode pumping and analysis of thermal effects.

Main Results:

Maximum output power of 495 mW at 1.064 µm was achieved with 885 mW absorbed pump power.
Maximum slope efficiency reached 57%.
Output power showed minimal dependence on pump polarization; thermal effects reduced output, requiring active cooling.

Conclusions:

The miniature monolithic Nd:YVO4 laser demonstrates efficient high-power operation.
Laser diode pumping is feasible, but thermal management is critical for sustained performance.
Further optimization of thermal management is needed for practical applications of these compact lasers.