Fluorescence line narrowing (FLN) and site-selective fluorescence decay of Nd3+ centers in CaF2

Effects of Nd Concentration on Microstructure and Optical Properties of Nd: CaF2 Transparent Ceramics

“…According to literature, the different types of centers associated with such aggregates substantially affect the spectroscopic behavior of these RE‐doped fluoride crystals and this limits the incorporation of efficient active centers . The strong electrostatic multipole (dipole–dipole d–d, dipole–quadrupole d–q, quadrupole–quadrupole q–q) and the super‐exchange interactions were proposed to be the main reasons for energy transfer …”

“…27,32 The strong electrostatic multipole (dipole-dipole d-d, dipole-quadrupole d-q, quadrupolequadrupole q-q) and the super-exchange interactions were proposed to be the main reasons for energy transfer. 33,34…”

Optical spectra and excited state relaxation dynamics of Nd3+ in CaF2 single crystal

“…The laser-selective-excitation studies of hydrogenated CaF 2 :Nd 3+ crystals have identified numerous F-charge compensated centers in addition to well established C 4V centers [5,6]. Site selective and time resolved spectroscopy has been applied to determine level splitting and nonradiative relaxation of aggregated centers in Nd 3+ -doped CaF 2 [7][8][9][10]. As far as we know, only one published paper has been devoted to the assessment of laser potential of Nd 3+ -doped CaF 2 system [11].…”

Linear correlation of crystal structure and spectral properties of Nd3+ in Ca1‐xSrxF2 mixed crystals

“…These advantages made the trivalent lanthanides doped alkaline earth fluorides be promising candidate for generation of high repetition rate ultrashort lasers. Unfortunately, early works revealed that luminescence of Nd 3+ clusters, formed easily in these crystals, have been deadly quenched by incoherent dipole‐dipole energy transfer process . The quenching effect greatly limited the application of rare earth ions doped alkaline earth fluoride laser crystals.…”