Tunable quasi-cw two-micron lasing in diode-pumped crystals of mixed Tm³⁺-doped sodium — lanthanum — gadolinium molybdates and tungstates

Growth and the Actual Compositions of Cation‐Deficient Sodium‐Gadolinium Molybdate Single Crystals

“…Scheelite‐like sodium‐rare‐earth double molybdate and tungstate single crystals with the general formula Na m R n TO 4 (R = La 3+ , Gd 3+ , Y 3+ , Bi 3+ ;T = Mo 6+ , W 6+ , m ≈ n ≈ 0,5), doped by rare‐earth ions, are promising laser, Raman, and quantum cutting media, as well as the efficient phosphors for white light‐emitting diodes. [ 1‐11 ]…”

“…These features of the spectroscopic characteristic of scheelite‐like crystals allow their usage as the active media of femtosecond lasers operating in mode‐locked regime, [ 3,4,8 ] as well as broadly tunable lasers, [ 3,4,6 ] and diode pumped solid‐state lasers, convenient for operation in field conditions with self‐contained power supply, because no additional energy for thermostabilization of the pumping diodes is necessary for such lasers. [ 2,9 ]…”

Influence of initial charge composition and growth/annealing atmospheres on the structural parameters of Czochralski-grown (NaxGd1−x)MoO4crystals

“…[4][5][6][7] At the same time, due to the high degree of distortion of the local environment of activator-ions, 8 the intensity of the intracenter f-f transitions in these crystals increases and provides large cross-sections for spectral transitions. This allows these molybdates to be used as active laser media emitting ultrashort pulses, 5 as well their application in solid-state lasers tunable over a wide frequency range 9,10 and in diode-pumped lasers without temperature stabilization of a pump diode. 11 Among the sodium rare-earth molybdates, sodiumgadolinium molybdate (Na x Gd 1−x )MoO 4 (NGM) doped with rare-earth activators has important advantages, including improved spectroscopic characteristics.…”