Scaling of energy characteristics of polycrystalline Fe²⁺:ZnSe laser at room temperature

Laser properties of active media based on ZnSe doped with Fe and In from spray pyrolysis deposited films

“…The 130 mm long The values of differential efficiency of Fe:ZnSe active elements with one-sided doping obtained in this work were lower than the maximum values of this parameter (η = 53%) for polycrystalline active elements with bilateral doping [27]. At the same time, the efficiency of these samples is on a par with the efficiency of Fe:ZnSe single crystals [28] and polycrystalline active elements with inner doped layer(s) produced by the CVD technique [29,30] and SSDB. The lasing efficiency of sample #4 produced by diffusion annealing in a zinc atmosphere was significantly lower (ηµ = 25%), that, in our opinion, is associated with the short length of the active region under the given doping conditions, which is confirmed by the distribution profile of the Fe 2+ ion concentration.…”

Investigations of Nanoscale Defects in Crystalline and Powder ZnSe Doped With Fe for Laser Application

“…The value of the laser differential efficiency is η slope = 52%. The use of active elements with increased transverse dimensions (50–70 mm), as well as an increase in the HIP treatment duration more than 50 h, made it possible to suppress parasitic generation at large diameters of the pump spot . We found out that in the case of 14.5 mm diameter pump spot, the generation energy was 1.52 Joule with a differential efficiency η slope = 53% and the total efficiency for the energy absorbed in the active element equiled η abs ≈ 50% .…”

“…The measurement procedure of characteristics of lasers based on polycrystalline ZnSe:Fe 2+ samples was the same as described in Ref. . All measurements were carried out at room temperature.…”

Fabrication and Luminescent Properties of Er-Doped Sr5(PO4)3F Ceramics

“…Since SFAP (also known as stronadelphite) has a non-cubic anisotropic crystal structure, its application as a laser material in the form of polycrystals (e.g., ceramics) is limited due to birefringence-induced losses of the transmitted light. At the same time, the higher mechanical properties of ceramics compared to single crystals, the possibility of increasing the concentration of the active additive and creating gradient-doped materials can lead to significant progress in the laser properties of solid-state laser materials, as has been shown for other laser ceramics, such as yttrium aluminum garnet [7], zinc selenide [8], calcium and strontium fluorides [9].…”