Luminescent and laser properties of Yb?Er:GdCa4O(BO3)3: a new crystal for eye-safe 1.5-?m lasers

Passive Q-switching of Yb bulk lasers by a graphene saturable absorber

“…Concentration of Er x Yb y Gd 1-x-y Al 3 (BO 3 ) 4 with x = 0.015 and y = 0.11 in the initial load corresponded to 17 wt.%. As a result, Er,Yb:GdAB single crystals with high optical quality and the size up to 20х10х10 mm 3 have been grown. The concentrations of the dopants were measured by microprobe analysis to be 1 at.…”

“…CW room-temperature laser operation was demonstrated for following Er,Yb-codoped crystals: GdCa 4 O(BO 3 ) 3 [3], LaSc 3 (BO 3 ) 4 [4], YCa 4 O(BO 3 ) 3 [5]; while for Li 6 Y(BO 3 ) 3 [6], Sr 3 Y 2 (BO 3 ) 4 [7], Sr 3 Gd 2 (BO 3 ) 4 [8], GdAl 3 (BO 3 ) 4 [9], and LuAl 3 (BO 3 ) 4 [10] quasi-continuous-wave regime of operation was realized. However, a maximal CW output power didn't exceed 250 mW with slope efficiency of 27 % [5].…”

Laser Performance of Er,Yb:YAl3(BO3)4 Crystals with Different Erbium Concentrations

“…As a result, Er,Yb:YAB crystals with high optical quality and the size up to 20х10х10 mm 3 have been obtained The concentrations of the dopants were measured by microprobe analysis to be 0.83×10 20 cm 2 and bandwidth of 17 nm (FWHM) in σ polarization. The stimulated emission cross-section spectra calculated by the reciprocity method using the Stark energy level scheme of 4 I 13/2 and 4 I 15/2 manifolds are plotted in Fig.…”

“…CW room-temperature laser operation was demonstrated for the following Er,Yb-codoped oxoborate crystals: GdCa 4 O(BO 3 ) 3 [2], LaSc 3 (BO 3 ) 4 [3], YCa 4 O(BO 3 ) 3 [4]; while for Li 6 Y(BO 3 ) 3 [5], Sr 3 Y 2 (BO 3 ) 4 [6], Sr 3 Gd 2 (BO 3 ) 4 [7], and LuAl 3 (BO 3 ) 4 [8] quasi-continuous-wave regime of operation was realized. Comparatively recently, excellent laser performance of Er,Yb-codoped YAl 3 (BO 3 ) 4 (YAB) and GdAl 3 (BO 3 ) 4 crystals was demonstrated [9,10].…”

In-band pumped room-temperature Er:KY(WO4)2 laser emitting around 1.6 μm

“…Continuous-wave (CW) room-temperature laser operation was demonstrated for several Er-, Yb-codoped crystals: garnets [1], vanadates [2], oxoborates [3][4][5][6] and tungstates [7,8]. Here the ytterbium absorption band at 0.9-1.0 µm was used for pumping and energy transfer to Er ions was utilized.…”