Dynamics of DFB dye lasing by polarization modulation: simulations and experiment

Abstract

Abstract. Distributed feedback (DFB) dye lasing by polarization modulation is studied theoretically on the basis of modified rate equations. Numerical solution of these equations allows to obtain the generated power dynamics and the dependence of laser energy on pump energy. The results of calculations are in good qualitative agreement with the experimental data.

Temporal output profile of gain-coupled distributed feedback dye laser

“…In particular, several irregularities appear in the temporal profile of the laser pulse train, when the gain medium is pumped at energy levels higher than the threshold (usually above three times). The sequential energy pattern of spikes in the laser output pulse train changes, as observed in many studies [13,[21][22][23][24]. Although some theoretical models such as a semiclassical model based on density matrix [25], a dynamic model based on coupled wave theory and rate equations for DFB waveguide dye lasers [26], and a modified SQS model for polarization modulation lasing [13] have been suggested, none of them is capable of providing an exact explanation of the temporal output profile of the laser at higher pump levels.…”

“…The sequential energy pattern of spikes in the laser output pulse train changes, as observed in many studies [13,[21][22][23][24]. Although some theoretical models such as a semiclassical model based on density matrix [25], a dynamic model based on coupled wave theory and rate equations for DFB waveguide dye lasers [26], and a modified SQS model for polarization modulation lasing [13] have been suggested, none of them is capable of providing an exact explanation of the temporal output profile of the laser at higher pump levels. Therefore, an appropriate and exper imentally compatible study, which could show good agreement with measurements, both quantitatively and qualitatively, is required.…”

“…To date, many efforts have been made to progress toward creating efficient DFB solid-state dye lasers, such as synthesis of new, efficient and photostable laser dyes and novel methods for embedding organic compounds into the solid-state hosts [10]. Moreover, a novel DFB lasing method was introduced by means of polarization modulation [11][12][13]. For these reasons, these lasers are still a challenging and active subject to scientists [14,15].…”

The dynamics of gain-coupled distributed feedback dye laser: feedback mechanism and laser field evolution

“…Despite numerous reports on the creative DFB structures, including the previously mentioned works, the dynamic properties of gain-coupled distributed feedback (GC-DFB) dye lasers are poorly described by current theoretical models, which are based on the equivalent cavity lifetime [9,10].…”

The effect of pulsewidth of pumping pulse on the stability of distributed feedback dye laser

“…It is remarkable that, even though such lasers have been improved significantly and most of the ambiguities of pulse characteristics of these systems have been resolved [18][19][20][21][22], the output of the laser is a train of pulses with different pulsewidth and peak powers, which hinders its suitability for precision applications. In fact, pumping the dye solution slightly above threshold leads to pushing the laser to multipulse output mode.…”