Direct comparison of Yb3+-doped LiYF4 and LiLuF4 as laser media at room-temperature

Abstract

We present an extensive comparative analysis on the growth, the spectroscopic features, and the laser performances of room temperature Yb(5%):LiYF 4 (YLF) and Yb(5%):LiLuF 4 (LLF) crystals in the same conditions. The gain cross section, fluorescence lifetimes, laser thresholds and laser slope efficiencies are compared for the first time. It appears that Yb 3+ -doped LLF crystal might be more promising for diode-pumped high power laser operation. Intensity, a.u. ×10 3 30 25 20 15 10 5 0 45 40 35 30 25 20 15 10 5 0 Time, μs YLF LLF YLF: (2.2 ms) LLF: (2.6 ms)Room-temperature fluorescence decay curves of the grown crystals at 1025 nm

Ca3La2(BO3)4crystal: a new candidate host material for the ytterbium ion

“…Furthermore, the slope efficiency increased from 56% to 65% while the maximum output power showed a tiny decrease (from 3.67 to 3.65 W) with the increase of T oc from 3% to 5%. The obtained output power and slope efficiency in this work are comparable with those reported for other Yb 3+ -doped laser crystal such as Yb:Ca 3 Gd 2 (BO 3 ) 4 , Yb:BaGd 2 (MO 4 ) 4 , Yb:LiYF 4 [20][21][22]. So 5% output transmission in the plano-concave cavity is more suitable for the Yb:CLB laser in our work.…”

Polarized spectra calculation and continuous wave laser operation of Yb-doped disordered Ca3La2(BO3)4crystal

“…It was because the thermal properties along the b axis were better than those along the a axis and c axis [12]. The output powers were comparable with those reported in other Yb 3+ doped laser crystals such as Yb:CGB, Yb:CYB, Yb:Ca 4 LaO(BO 3 ) 3 (Yb:LCOB), Yb:YLiF 4 (Yb:YLF), and Yb:LuLiF 4 (Yb:LLF) [13,16,21,22]. In addition, to some extent, the continuous wave results were higher than those reported by Pan et al [12].…”

Efficient, diode-pumped, high-power (>300W) cryogenic Yb:YLF laser with broad-tunability (995-10205 nm): investigation of E//a-axis for lasing

“…In spite of the aforementioned advantages, research interest towards Yb:YLF was rather weak so far. Table 2 [21,23,28,32,[34][35][36][37][38][39][40][41] which presents a detailed summary of lasing results obtained with Yb:YLF shows that earlier high-power (>10 W) lasing studies mostly explored E//c axis of Yb:YLF at cryogenic temperatures [21,29,37]. On the other hand, the main advantage of Yb:YLF is its broad/smooth emission band in the E//a axis, where the gain is 6.4 fold lower (compared to the 995 nm line of the E//c axis).…”