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Alexandrite lasers with blue-diode-pumping.

Huaifeng Xiao, Xunuo Jiang, Michael J Damzen

|February 24, 2023

Summary

This summary is machine-generated.

High-power blue diode lasers efficiently pump Alexandrite lasers, achieving a record 1.84 W output. This study demonstrates excellent pump absorption and wavelength tuning, paving the way for optimized Alexandrite laser performance.

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Area of Science:

Laser physics
Solid-state lasers
Optoelectronics

Background:

Alexandrite lasers are broadly tunable solid-state lasers.
Blue diode lasers offer a cost-effective alternative to traditional pump sources.
Previous research has explored various pumping schemes for Alexandrite lasers.

Purpose of the Study:

To investigate the performance of an Alexandrite laser pumped by a high-power blue diode laser module.
To achieve the highest output power to date for a blue diode-pumped Alexandrite laser.
To analyze laser efficiency, mode formation, and wavelength tuning capabilities.

Main Methods:

Utilized a high-power fiber-delivered blue diode module for pumping.
Employed a Brewster-cut Alexandrite crystal to enable self-birefringent filtering.
Investigated pump absorption with scrambled pump polarization on both a-axis and b-axis.
Analyzed laser efficiency, mode formation (including Laguerre-Gaussian vortex modes), and wavelength tuning.

Main Results:

Achieved a record output power of 1.84 W from a blue diode-pumped Alexandrite laser.
Demonstrated excellent pump absorption regardless of crystal axis orientation.
Successfully produced wavelength tuning and dual-wavelength operation.
Observed the creation of higher-order Laguerre-Gaussian vortex modes (LG01 and LG02).

Conclusions:

Blue diode pumping is a viable and efficient method for Alexandrite lasers.
The achieved output power represents a significant advancement in the field.
Further optimization and power-scaling are feasible, with potential applications in various laser technologies.