Self-pulsing in lasers with transverse flow of active medium

Baranov, A. N.; Nikolaeva, O. Y.; Odintsov, A. I.; Fedoseev, A. I.

doi:10.1070/qe1993v023n06abeh003114

Cited by 3 publications

(4 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A standard solution of equation (5) gives the relationship between the amplitudes ( ) g x and ( ) w x of the perturbation modes:…”

Section: Analytical Modelmentioning

confidence: 99%

“…For example, the ruby laser active rod moving along the cavity axis modifies the lasing regime [1]. Gas lasers with a fast transverse flow of active medium through a resonator system may show instability and have various self-pulsing regimes, both regular and chaotic [2][3][4][5][6][7][8][9][10]. The mechanism of lasing instability is based on the feedback between different spatial parts of an optical cavity due to the medium motion.…”

Section: Introductionmentioning

confidence: 99%

“…This behavior is also addressed by the theory of nonlinear optical processes in a moving media. The practical interest of the phenomena is associated with the development of regime control methods that are applicable to powerful gas-flow lasers [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…The majority of studies on the dynamics of lasing have been made in the context of fast-flow lasers with unstable cavities (UC). Generator-amplifier systems have also been considered [5]. In particular, it was shown that the periodic structure of the optical field in the amplifier cavity can stimulate self-oscillation instability [13].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The gradient waves of perturbations as an instability factor in fast-flow lasers

et al. 2016

Self Cite

View full text Add to dashboard Cite

We study the mechanism of the self-oscillation instability associated with the nonlinear interaction of radiation with a moving active medium in a fast-flow gas laser. The results of our analytical and numerical calculations of the frequencies and increments of the small self-oscillation perturbations in an unstable cavity of the laser with a non-uniform pumping rate are presented. In the analytical model the small perturbations of the gain in each point of the flow consist of two parts. The first part includes the 'local' perturbations that are not related to a motion of the medium. The second part includes the 'flow' perturbations that arise upstream of the flow due to the gradients of the pumping rate and the laser field intensity. These perturbations are carried by the flow in the form of traveling waves. The interference of the 'gradient' waves of the flow perturbations results in the resonant properties of the feedback produced by the flow. It is demonstrated that it is feasible to control the lasing regime based on these resonant properties of the feedback. The simulation of the nonlinear lasing regimes demonstrates that the conversion of continuous lasing into the periodical self-pulsing regime is not accompanied by a significant reduction in the average power output.

show abstract

“…A standard solution of equation (5) gives the relationship between the amplitudes ( ) g x and ( ) w x of the perturbation modes:…”

Section: Analytical Modelmentioning

confidence: 99%