Modeling a distributed feedback dye laser pumped by a Nd-glass laser

A mathematical model has been developed to describe the dynamic emission of a distributed feedback dye laser (DFDL) pumped by a Nd-glass laser. The model is based on the coupled-wave theory. It allows the investigation of the temporal behavior of the Nd-glass pumping laser source and the DFDL pulses...

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Bibliographic Details
Published in:Applied physics. B, Lasers and optics Lasers and optics, 2006-03, Vol.82 (3), p.395-401
Main Authors: GHANI, B. A, HAMMADI, M
Format: Article
Language:English
Subjects:
Amplification
Coefficient of variation
Density
Dye lasers
Exact sciences and technology
Feedback
Fundamental areas of phenomenology (including applications)
Lasers
Mathematical models
Neodymium
Optics
Physics
Temporal logic
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Summary:A mathematical model has been developed to describe the dynamic emission of a distributed feedback dye laser (DFDL) pumped by a Nd-glass laser. The model is based on the coupled-wave theory. It allows the investigation of the temporal behavior of the Nd-glass pumping laser source and the DFDL pulses. The model allows studying the effect of the variation of the laser input parameters of the Nd-glass laser, such as maximum amplification coefficient, loss coefficient and pumping rate on the characteristics of DFDL pulses regarding the pulse width, delay time and separation time. The feedback process of the DFDL is provided either by changes of the refractive index or by optical gain or by both together. The model estimates the following: temporal behavior of the density of emitted radiation, energy densities of the first excited singlet and triplet states, DFDL output power, cavity decay time and the temperature of the produced grating. The numerical solution of the nonlinear coupled rate equation system predicts the generation of DFDL picosecond pulses. The calculated results are in good agreement with the available experimental data. The calculations were done using rhodamine 6G dissolved in ethanol as the investigated matrix.
ISSN:0946-2171
1432-0649
DOI:10.1007/s00340-005-2100-2