Analysis of the effect of amplified spontaneous radiation on a phase-conjugated YAG:Nd laser oscillation at a wavelength of 1.34 um at electro-optical and passive Q-switching of an open multi-loop cavity
Mikhail N. Ershkov,1, Sergei A. Solokhin,1, Alexander E. Shepelev,2 Alexander A. Antipov,2
1 Degtyarev Kovrov State Technological Academy, Kovrov, Russia
2 Institute on Laser and Information Technologies of Russian Academy of Sciences - Branch of Federal Scientific Research Center “Crystallography and Photonics” of Russian Academy of Sciences, Shatura, Russia
Abstract
In this work, a comparative analysis of the influence of the amplified spontaneous emission (ASE) at a wavelength of 1.06 μm on oscillation characteristics at a wavelength of 1.34 μm for a YAG:Nd3+ laser with a phase-conjugated open multiloop cavity at passive and electro-optical Q-switching is presented. At the passive Q-switching, the intense ASE growth is associated with insufficient spectral selectivity of the cavity mirrors having residual reflection at a wavelength of 1.06 μm of about 4%. At the electro-optical Q-switching, the control by the time delay between the pump pulse and the moment of Q-switch opening made it possible to reduce the ASE power by more than a factor of two.
This research was supported by the Russian Science Foundation – Project No 22-22-20092,
https://rscf.ru/project/22-22-20092.
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Mikhail Ershkov
Degtyarev Kovrov State Technological Academy
Russian Federation
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