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Q-switched Nd:YAG optical vortex lasers.

D J Kim, J W Kim, W A Clarkson

|February 12, 2014

Summary

This summary is machine-generated.

This study demonstrates a high-quality Neodymium-doped Yttrium Aluminum Garnet (Nd:YAG) laser producing optical vortex pulses. The laser achieved stable helical wavefronts, crucial for advanced optical applications.

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Area of Science:

Laser Physics
Quantum Optics
Materials Science

Background:

Optical vortex lasers are essential for applications requiring precise light manipulation.
Generating stable, high-quality optical vortices, especially in pulsed regimes, presents significant technical challenges.
Neodymium-doped Yttrium Aluminum Garnet (Nd:YAG) lasers are workhorses in various scientific and industrial fields.

Purpose of the Study:

To report the Q-switched operation of a high-quality Nd:YAG laser producing first-order Laguerre-Gaussian (LG01) mode optical vortex pulses.
To demonstrate a fiber-based pump beam conditioning scheme for achieving well-determined helical wavefronts.
To investigate the stability and characteristics of the generated optical vortex pulses.

Main Methods:

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Utilized a simple two-mirror resonator with an acousto-optic Q-switch.

Incorporated an etalon and a Brewster plate to enforce specific output helicity.

Employed a fiber-based pump beam conditioning scheme for the Nd:YAG laser.

Main Results:

Achieved Q-switched pulses with approximately 250 μJ pulse energy and 33 ns pulse duration (FWHM).
Operated the laser at a 0.1 kHz repetition rate with 5.1 W of absorbed pump power.
Demonstrated preservation of helical wavefront handedness across different repetition rates.

Conclusions:

The developed Nd:YAG optical vortex laser system is effective for generating high-quality pulsed vortex beams.
The fiber-based pump conditioning and resonator design enable stable generation of LG01 mode pulses with defined helicity.
The results indicate potential for further power scaling and improved performance for advanced optical applications.