Lasers

Transverse mode locking of the Stokes component of a diode end-pumped Q-switched Nd : KGW laser

A. L. Koromyslov^a, I. M. Tupitsyn^a, E. A. Cheshev^a, R. V. Chulkov<sup>b

a</sup> P. N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow
^b B. I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, Minsk

Abstract: Lasing in a solid-state inhomogeneously diode endpumped Nd : KGW/Cr⁴⁺ : YAG laser is obtained at wavelengths of 1067 and 1181 nm (Stokes shift 901 cm^-1) under conditions of frequency degeneracy of cavity modes. In this case, the radiation has a characteristic ring spatial structure, which testifies to transverse mode locking of the fundamental and Stokes components. The possibility of controlling the Raman conversion efficiency by changing the position of an undoped KGW crystal additionally installed in the cavity is demonstrated. It is shown that the transverse mode locking is accompanied by the total longitudinal mode locking at λ = 1067 and 1181 nm.

Keywords: solid-state lasers, longitudinal diode pumping, transverse mode locking, stimulated Raman scattering, SRS self-conversion.

Received: 22.03.2021

 English version: Quantum Electronics, 2021, 51:7, 582–585

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