Temporal dynamics of diode-pumped circulation-free liquid dye lasers

A highly stable diode-pumped circulation-free liquid dye laser in a plano-concave cavity is reported. The design is simple (no fabrication process step required and no fluid circuitry), compact (∼ cm sized), and cost-effective. An optical efficiency of 18% with an M2 of 1 is reported with an excelle...

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Bibliographic Details
Published in:Journal of applied physics 2020-07, Vol.128 (1)
Main Authors: Hamja, A., Chénais, S., Forget, S.
Format: Article
Language:English
Subjects:
Applied physics
Circuits
Dye lasers
Dyes
Dynamic stability
Lasers
Optics
Physics
Pulse duration
Repetition
Shutdowns
Temperature effects
Thermal lensing
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Summary:A highly stable diode-pumped circulation-free liquid dye laser in a plano-concave cavity is reported. The design is simple (no fabrication process step required and no fluid circuitry), compact (∼ cm sized), and cost-effective. An optical efficiency of 18% with an M2 of 1 is reported with an excellent photostability—no efficiency drop was seen after 1.4 × 106 pulses at 50 Hz, a value comparable to flowing systems. We show that thermal effects are central in the stability and also on the dynamics of this laser. The laser build-up and shutdown dynamics are studied in detail for different pump pulse durations/repetition rates; they reveal pulse shortening with an increasing pump pulse duration and repetition rate that are shown to be due to thermal lensing diffraction losses. This laser structure offers a very convenient and simple platform for testing or harvesting solution-processable gain materials.
ISSN:0021-8979
1089-7550
DOI:10.1063/5.0008474