On the theory of a pulse laser with microwave pumping
DOI:
https://doi.org/10.30837/rt.2019.4.199.12Keywords:
microwave-pumped laser, sulfur lamp, pulse operation, generalized wave equation, numerical simulation.Abstract
The construction of a laser with a microwave pumping based on the light-pumping cell that uses radiation of sulfur vapor exposed to electromagnetic waves of the microwave band is discussed. The advantages of this device are high efficiency of the optical pumping cell, simple structure, the possibility of cooling the pumping element, and easiness of modifying the emission spectrum of the optical pumping by changing the admixtures in the light-emitting cell. A mathematical tool for the simulation of the short-pulse operation of this laser is proposed basing on the solving a generalized wave equation. The microwave waveguide with the sulfur vapors is interpreted as a regular transmission line with essentially nonlinear dispersion characteristic and substantial dissipation. Possible techniques for the numerical solving the generalized wave equation are described. The continuous approximation of the regular dispersive line is used. In the Fourier approach, the electric field in the system is calculated as a series in the longitudinal wavenumber. As an alternative, the D’Alembert approach may be used, with evaluating the electric field as a series in the frequency. Three-layer explicit and implicit second-order approximation schemes for the solving generalized wave equation in the Fourier approach are constructed. The modeling of radio pulse propagation in the “cold” regular electrodynamic system was performed. Stability of the algorithm and qualitative agreement between the numerical and analytic results confirm the correctness of the base equations as well as their solutions based at the finite-difference schemes.References
Svelto O. and D. C. Hanna. Principles of lasers. 5th ed. Springer, 2009.
US Patent No. 5404076, H 01 J 17/20, 1995.
Bondarenko I. N. and A. V. Galich. An electrodeless lamp based on the resonant irregular microwave structures // Proc. of 23d Int. Crimean Conf. “Microwave & Telecomm. Technology” (CriMiCo’2013), pp. 1063-1064, 2013.
US Patent No. 5781579, H 01 S 003/03, 1998.
Korchagin Yu. V. Device for microwave excitation and maintenance of generation of a gas-discharge laser by creating a plasma coaxial line Available: https://findpatent.ru/patent/216/2164048.html
Bondarenko I. N., E. A. Gorbenko and V. I. Krasnoshok. Microwave switch based on waveguide T-junction for compression resonant pulse former // Telecommunication and Radio Engineering. 2017. Vol. 76, no. 6. P. 469-475.
Bondarenko I. N., E. A. Gorbenko, and V. I. Krasnoshok, “Microwave switch based on a combined coaxial-waveguide tee for a cavity pulse shaper // Telecommunication and Radio Engineering. 2018. Vol. 77, no. 5. P. 391-397.
Gritsunov A. V. Theory of natural oscillatory systems // Research Gate project [Online]. Available: https://researchgate.net/project/Theory-of-Natural-Oscillatory-Systems
Gritsunov A. V. Expansion of nonstationary electromagnetic potentials into partial functions of electrodynamic system // Radioelectronics and Comm. Systems. 2006. Vol. 49, no. 7. P. 6-12,
Gritsunov A. V. Methods of calculation of nonstationary nonharmonic fields in guiding electrodynamic structures // J. of Comm. Technology and Electronics. 2007. Vol. 52, no. 6. P. 601-616,
Gritsunov A. V. and Skachkova N. V. Propagation of short radio pulses through delay line of a cold TWT // 2006 Int. Vacuum Electronics Conf. (IVEC 2006), Monterey, 2006. CA. P. 121-122,
Gritsunov A. V. and Ostapyuk N. V. Numerical simulation of UWB electromagnetic pulses propagation in dispersive electrodynamic lines // Sixth Int. Symposium on Physics and Engineering of Microwaves, Milli-meter and Submillimeter Waves (MSMW’07), Kharkiv, Ukraine, vol. 1, pp. 313-315, 2007.
Gritsunov A. V. The quantum dynamics of natural distributed oscillatory systems // Proc. 9th Int. Kharkiv Symp. on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves, Kharkiv, pp. 1-4, 2016.
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