Modeling a distributed feedback dye laser pumped by a Nd-glass laser |
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Authors: | BA Ghani M Hammadi |
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Institution: | (1) Atomic Energy Commission, PO Box 6091, Damascus, Syria |
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Abstract: | 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. |
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