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Single-mode flashlamp-pumped dye laser oscillators.

F J Duarte¹, R W Conrad

¹University of Alabama, Physics Department, University, Alabama 35486, USA.

|March 1, 1986

Summary

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This study demonstrates single-longitudinal-mode operation in a flashlamp-pumped dye laser, achieving narrow linewidths around 260 MHz. The novel multiple-prism beam expander enabled efficient laser performance with high output energy.

Area of Science:

Optics and Photonics
Laser Physics

Background:

Achieving stable, narrow-linewidth laser output is crucial for various spectroscopic and scientific applications.
Flashlamp-pumped dye lasers offer tunable wavelength output but often struggle with mode stability and spectral purity.

Purpose of the Study:

To investigate single-longitudinal-mode operation in a flashlamp-pumped dye laser.
To evaluate the effectiveness of a multiple-prism beam expander in improving laser performance.
To characterize the spectral linewidth and output energy of the developed laser system.

Main Methods:

Incorporation of a multiple-prism beam expander into a flashlamp-pumped dye laser oscillator.
Utilizing a grating in either Littrow or grazing-incidence configuration.
Employing rhodamine 590 dye for laser operation.

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Main Results:

Achieved stable single-longitudinal-mode operation.
Obtained linewidths in the 260-MHz range.
Delivered output energies exceeding 60 mJ.
Measured a pulse duration of approximately 200 ns (FWHM) for the Littrow configuration.

Conclusions:

The multiple-prism beam expander effectively enables single-longitudinal-mode operation in flashlamp-pumped dye lasers.
The system provides high output energy with a narrow spectral linewidth, suitable for demanding applications.
This configuration represents a significant advancement in dye laser technology.