Growth, spectroscopy and high power laser operation of Yb:YAl3(BO3)4 crystal: Continuous-wave, mode-locking and chirped pulse regenerative amplification

Growth and Spectroscopy of Yb:YMgB5O10 Crystal

“…Considering the radiative lifetime of the 2 F 5/2 Yb 3+ level calculated in [52], the luminescence quantum yield was estimated to be about 0.87. The difference in the obtained value from 1, that is the usual case for Yb 3+ -doped materials, can be explained by the large phonon energy in the borate crystals which promoted an effective non-radiative depletion of the upper Yb 3+ ion energy level [48].…”

“…Borate crystals (Ca 4 YO(BO 3 ) 3 , Ca 4 GdO(BO 3 ) 3 , Sr 3 Y(BO 3 ) 3 ) with trivalent ytterbium ions Yb 3+ have wide gain bands and long fluorescence lifetimes of about 2.5 ms; however, these crystals have comparatively low absorption and stimulated emission cross-sections [8,27] and low thermal conductivity (~2 W/m•K) [43]. Yb:YAl 3 (BO 3 ) 4 (YAB) oxoborate crystals have high thermal conductivity (~4.7 W/m•K), high absorption and emission cross-sections, as well as broad and smooth gain bands [44][45][46][47][48]. Borate crystals, such as LaMgB 5 O 10 , also have good thermal conductivity and optical properties [49,50].…”

Growth, crystal structure and IR luminescence of KSrY1–x Er x (BO3)2

“…4 I 15/2 transition. Consequently, the use of a 976 nm diode for end-pumping enables amplification of 1.5 mm laser radiation (Rudenkov et al, 2019;Pacifici et al, 2003).…”