Laser performance of disordered Yb:Ca₃(NbGa)_2-xGa₃O₁₂crystal under diode pumping at 974-976 nm

Abstract

Abstract:Efficient continuous-wave (CW) laser operation is demonstrated at room temperature with disordered Yb:Ca 3 (NbGa) 2−x Ga 3 O 12 crystal by diode pumping at 974 -976 nm. With 2.0 W of pump power absorbed in a 1.5 mm thick crystal, a CW output power of 0.62 W is generated, resulting in an optical-to-optical efficiency of 31%, while the slope efficiency amounts to 50%. Upon increasing the pump power to a high level, a transient process takes place, in which the output power decreases continuously towards its stationary value. Slope efficiency: η = 60% Crystal: 2.5 mm thick T = 2%Relationship between Pout and P abs measured in the transient process of power reduction, giving rise to a slope efficiency of η = 60%

Generation of 534 fs pulses from a passively mode-locked Nd:CLNGG-CNGG disordered crystal hybrid laser

“…According to the reported growth study [19], the CLNGG crystal used in the experiment has a chemical formula as Ca 3 [20]. Based on the distinct gain profiles of Nd:CNGG and Nd:CLNGG, we think the gain profile of Nd:CLNGG will be changed by altering the additive Li + ion concentration.…”

“…In recent years, disordered crystals have attracted much attention as laser gain media [1][2][3][4][5][6][7][8]. In the disordered crystals, the cation ions randomly distribute in some lattice sites, resulting in a complex and disordered lattice field in the crystal.…”

Efficient laser oscillation of a new disordered Yb:CLNGG crystal

“…During the past few years, extensive studies have been conducted on Nd:CNGG, including continuous-wave (CW) laser oper-ation on the three main transitions from 4 F 3/2 to 4 I 13/2 , 4 I 11/2 , and 4 I 9/2 [2][3][4][5][6]; generation of visible radiation through intracavity frequency doubling or sum-frequency mixing [7][8][9][10]; and mode-locked laser action [11]. Besides Nd:CNGG, ytterbium doped CNGG (Yb:CNGG) has also been developed in 2007 [12], and has proven to be a promising laser medium for both CW and pulsed (Qswitched or mode-locked) laser applications [13][14][15][16]. Very recently, a new different kind of Nd doped disordered garnet crystal, Nd:GYSGG, was also developed, showing promising potential in generating CW, Q-switched, and mode-locked laser operation [17,18].…”

Performance of diode pumped Yb:Y2Ca3B4O12laser with V3+:YAG as saturable absorber for passively Q-switched mode-locking operation

“…These are favorable for efficient ultrashort pulse generation in Q-switching or mode-locking operation. In recent years, many Yb-doped crystals or ceramics, such as Yb:YAG, Yb:KY(WO 4 ) 2 , Yb:Sr 3 Y(BO 3 ) 3 , and so on, have been widely studied [1][2][3][4][5][6][7][8]. The crystallographic structure of a new type singcrystal host for Yb 3+ ions, Yb:Y 2 Ca 3 B 4 O 12 (Yb:CYB), was also investigated [9,10].…”