The matrix effect on generation of quasi-three-level continuous wave neodymium laser under inhomogeneous pumping

Authors

  • Vаleryiа I. Gerаsimenko Belarusian State University, 4 Niezaliežnasci Avenue, Minsk 220030, Belarus
  • Ihаr V. Stаshkevitch Belarusian State University, 4 Niezaliežnasci Avenue, Minsk 220030, Belarus

Keywords:

neodymium laser, quasi­-three-­level scheme, spatial beam inhomogeneity, slope efficiency, pump power  threshold, Nd : KGW, Nd : GVO, Nd : YVO, Nd : YAG, Nd : GGG, Nd : YAP

Abstract

The main generation characteristics of a neodymium-doped laser with a quasi-three-level scheme are analyzed for most common crystalline matrices. The energy characteristics of radiation from such a laser with different matrices in the stationary mode are studied theoretically. The operation of both the end-pumped and transversely-pumped laser has been simulated. The results of the calculations show that allowance for the spatial inhomogeneity of the pump beam, both for longitudinal and transverse excitation, leads to the increased calculated value of the pump threshold power and to the decreased generation efficiency parameter compared to the results for the point model of laser. It is demonstrated that the two matrices YAG and GGG have optimal threshold pump powers and slope efficiencies due to lower reabsorption losses.

Author Biographies

  • Vаleryiа I. Gerаsimenko, Belarusian State University, 4 Niezaliežnasci Avenue, Minsk 220030, Belarus

    masters degree student at the department of laser physics and spectroscopy, faculty of physics

  • Ihаr V. Stаshkevitch, Belarusian State University, 4 Niezaliežnasci Avenue, Minsk 220030, Belarus

    PhD (physics and mathematics), docent; associate professor at the department of laser physics and spectroscopy, faculty of physics

References

  1. Stashkevich I. V., Gerasimenko V. I. The matrix effect on the generation of quasi­three­level neodymium laser in the stationary mode. J. Belarus. State Univ. Phys. 2017. No. 1. P. 88–94 (in Russ.).
  2. Stashkevich I. V., Novitskaya R. I. The lasing characteristics of quasi­three­level diode­pumped Nd : KGW laser. Vestnik BGU. Ser.1, Fiz. Mat. Inform. 2016. No. 3. P. 71–75 (in Russ.).
  3. Risk W. P. Modeling of longitudinally pumped solid­state lasers exhibiting reabsorption losses. J. Opt. Soc. Am. 1988. Vol. 5, issue 7. P. 1412–1423.

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Published

2019-01-20

Issue

No. 2 (2018): Journal of the Belarusian State University. Physics

Section

Laser Physics

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How to Cite

(1)
Gerаsimenko V. I.; Stаshkevitch I. V. The Matrix Effect on Generation of Quasi-Three-Level Continuous Wave Neodymium Laser under Inhomogeneous Pumping. Журнал Белорусского государственного университета. Физика 2019, No. 2, 11-16.