3.77-5.05-μm tunable solid-state lasers based on Fe/sup 2+/-doped ZnSe crystals operating at low and room temperatures

Laser crystals and ceramics: recent advances

“…k) According to [64], laser action at a wavelength of 2.234 µm can belong to the U 4+ ions in tetragonal centres of the CaF2 host. l) Tunable SE range (∼ 3.95 to ∼ 5.05 µm wavelength) was achieved with ZnSe:Cr 2+ laser [708]. the excited configuration will influence different manifolds to a substantially different extent.…”

Investigation of Co, Ni and Fe Doped II-VI Chalcogenides

“…Indeed, optically pumped RT lasers based on Cr:ZnS, Cr:ZnSe, Cr:Cd 1-x Mn x Te, Cr:CdSe, and Fe:ZnSe crystals providing access to the 2-3 and 3.8-5 µm spectral regions with high (up to 70%) efficiency, multi-Watt-level output powers, tunability in excess of 1000 nm, and narrow spectral linewidth (<20 MHz), have been reported by several groups (see e.g. reviews [2,3,4,5,6] and references therein). Arguably these lasers represent nowadays the simplest and the most cost-effective route for high power, broadly tunable lasing in the 2-3 and 3.8-5 µm wavelength ranges.…”

“…The major states are labeled in the diagram. Parameters associated with the minima in the configuration curves (CC) for the ground and excited states as well as the absorption energies from the ( 4 F) 4 T 2 ground state with k = 0.2 are given in Table 8. These parameters were calculated using the formulas given in equations (36-38).…”

“…However, this transition is symmetry forbidden for the electric-dipole interaction and the maximum value of the absorption cross section was estimated to be 5.210 -20 cm -2 at 2956 nm in Co:ZnSe samples. This is more than order of magnitude less than the value of the absorption cross-section values for the 4 Initially, a one week thermal diffusion from a cobalt thin-film was carried out to fabricate cobalt doped ZnSe and ZnS. After that in order to form Co:Fe:ZnSe and Co:Fe:ZnS, iron thin films were deposited on both crystals.…”

Электрофизические свойства кристаллов ZnSe, легированных переходными элементами

“…На основе кристаллов ZnSe : Cr и ZnSe : Fe успеш-но реализована эффективная лазерная генерация [1,2]. Применение этих кристаллов в электролюминесцентных структурах ограничено отсутствием исследований их электрофизических свойств.…”