Free-running instability in laser systems when the active medium moves in a spatially periodic field

Кузьминский Л.С., Одинцов А.И., Саркаров Н.Э., Федосеев А.И. Автоколебательная неустойчивость в лазерных системах с движением активной среды в пространственно-периодическом поле // Оптический журнал. 2009. Т. 76. № 6. С. 24–30.

Kuzminskiy L.S., Odintsov A.I., Sarkarov N.E., Fedoseev A.I. Free-running instability in laser systems when the active medium moves in a spatially periodic field [in Russian] // Opticheskii Zhurnal. 2009. V. 76. № 6. P. 24–30.

L. S. Kuz’minskiĭ, A. I. Odintsov, N. É. Sarkarov, and A. I. Fedoseev, "Free-running instability in laser systems when the active medium moves in a spatially periodic field," Journal of Optical Technology. 76 (6), 338-342 (2009). https://doi.org/10.1364/JOT.76.000338

Using a flow-through laser with an unstable-cavity-multibeam-amplifier optical system as an example, it is shown that, when the active medium moves through a spatially periodic field, self-excited perturbations can build up in the flow of the medium, resulting in instability of the steady-state lasing. This phenomenon is explained by the interference of the perturbation waves formed in the moving medium at the edges of the beams.