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High-stability coaxial flashlamp-pumped dye laser.

T B Lucatorto, T J McIlrath, S Mayo

|March 18, 2010

Summary

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Improving coaxial flashlamp-pumped dye laser stability was achieved through thermal isolation and uniform dye flow. This enhanced laser output quality, reducing divergence and spectral bandwidth.

Area of Science:

Optics and Photonics
Laser Physics
Dye Laser Technology

Background:

Coaxial flashlamp-pumped dye lasers are susceptible to thermal fluctuations affecting output stability.
Maintaining uniform dye flow is critical for consistent laser performance.

Purpose of the Study:

To investigate methods for enhancing the stability and output quality of coaxial flashlamp-pumped dye lasers.
To evaluate the effectiveness of thermal isolation and controlled dye flow on laser performance.

Main Methods:

A novel quadraxial laser tube design was employed, featuring thermal isolation via an evacuated annulus.
Specially designed end caps ensured uniform axial dye solution injection and removal.
The laser system was tested in a standard cavity with a 1200-line/mm grating in Littrow configuration.

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Main Results:

The improved design significantly enhanced laser output quality.
Achieved performance characteristics included 1-mrad divergence.
Spectral distribution bandwidth was 0.5-Angstrom, with wavelength jitter at maximum intensity of 0.04-Angstrom.

Conclusions:

Thermal isolation and uniform axially symmetric dye flow are crucial for improving coaxial flashlamp-pumped dye laser stability.
The quadraxial laser tube design effectively addresses these factors, leading to superior laser performance.
This approach offers a viable method for achieving high-quality output from dye lasers.