Study of the possibility of developing a multichannel-diode-pumped multikilowatt solid-state laser based on optically dense active media

Laser on single-crystal ZnSe:Fe2+with high pulse radiation energy at room temperature

“…Above these values the transmission saturates-the greater the spot, the lower the energy density at which saturation occurs. This behavior of crystal transmission versus the density of incident energy is, obviously, related to the parasitic generation (superluminescence) developing at large spot dimensions [25]. As expected, in the single-crystal that has a lower concentration of iron ions, the saturation of transmission and, correspondingly, parasitic generation, are revealed at substantially greater spot dimensions than in a polycrystalline sample.…”

CW TEM00 spectral narrow band Nd:YVO4 disk laser with two-mirror degenerate cavity configuration

“…The advantage of multi-point pumping is most clearly manifested itself in the case of high average power lasers, where it leads to a decrease in the influence of thermally induced effects in the active media on the output lasing parameters [10]. However, even in our case, the concentration of the maximum pump power (≈19 W) in one beam being sent to the AD would result in the maximum intensity value 42 kW cm −2 .…”

“…Our main goal was the study of the spectral parameters of a disk laser with a degenerate cavity configuration and one-, two-and three-beam pumping. The main attention was paid to the case of three-point pumping, which can reduce the thermal load on the active disk (AD) [10] and decrease the value of pump absorption saturation.…”

Untitled

“…Although the excellent heat dissipation performance is one of the main advantages of the disk form laser, the thermal effect in the active region is still a key factor limiting the power scaling of the SDL [5,6] . Splitting a single pump source or using multiple sources to pump multiple different regions on a disk is also called multi-point pumping [7,8] . This pumping method can distribute the pump power from one concentrated point to multiple different points and hence improve the heat dissipation.…”