10 W injection-locked single-frequency continuous-wave titanium:sapphire laser

TL;DR

This paper reports a high-power, single-frequency titanium:sapphire laser achieving 10 W output with good mode quality, tunability, and efficiency, using a low-loss cavity and thermal lens control.

Contribution

The study introduces a simple cavity design for high-power, single-frequency titanium:sapphire lasers with thermal lens management for stable operation.

Findings

Achieved 10 W single-frequency output at 51% efficiency.

Controlled thermal lens effects to maintain mode quality.

Demonstrated tunability and stability of the laser.

Abstract

High-power tunable lasers with good longitudinal and transverse modes are fundamental tools for exploring quantum physics. Here we report a high-power continuous-wave injection-locked titanium:sapphire laser with a low-loss cavity configuration, where only a laser crystal was installed in the laser cavity. Although the transverse mode was affected by a thermal lens formed in the laser crystal, the focal length of the thermal lens could be shifted via the temperature of the laser crystal holder or the pump power. As a result, we found a condition that 10 W single-frequency oscillation with a good transverse mode and a slope efficiency of 51% were achieved.