Efficient, broadly tunable, laser-pumped Tm:YAG and Tm:YSGG cw lasers

Abstract

Broadly tunable cw laser emission is reported in Tm:YAG and Tm:YSGG at room temperature with Ti:sapphire laser pumping. The Tm(3+)(3)F(4) ? (3)H(6) transition is tuned continuously over the ranges 1.87-2.16 microm in YAG and 1.85-2.14 microm in YSGG. Smooth tuning results from overlapping transitions between phonon-broadened crystal field Stark levels.

Crystal growth, spectroscopic characterization, and laser operation of Tm/Mg: LiTaO_3 crystal

“…The maximum emission cross section is 1.07 × 10 −20 cm 2 at 1762 nm, the second largest emission cross section is 0.81 × 10 −20 cm 2 at 1834 nm. Compared with the other crystals (Tm:YAG, Tm:YAP, Tm:YLF, and Tm:LLF) as shown in Table 1 [7][8][9][10][11][12], Tm/Mg: LT crystal exhibit larger emission cross section, indicating a potential for a wide tuning range and short pulse generation for this crystal.…”

“…During the past few years, different Tm doped crystalline host materials have been already investigated for their favourable properties to obtain an efficient laser emission [7][8][9][10][11][12], and Table 1 presents an example of demonstrated laser action in common Tm-doped crystals. However, only the Tm: YLF, Tm:YVO 4 , and Tm/Mg: LN crystals [9,11,12] obtained an efficient laser action with a center wavelength below 1.91 μm.…”

High Power Tunable Tm3+-fiber Lasers and Its Application in Pumping Cr2+:ZnSe Lasers

“…First, it is a good candidate in laser microsurgery due to high absorption of water in this spectral region thus can provide high-quality laser tissue cutting and welding. In addition, this wavelength-range laser has potential applications in environment monitoring, LIDAR, optical-parametric-oscillation (OPO) pump sources, and so on [1][2][3][4]. For obtaining laser emission in the mid-infrared wavelength region, the Tm 3+ -doped fiber is an excellent candidate due to several unique advantages it possesses.…”

“…The pure ZnSe poly-crystal and Cr powder was mixed in a vacuum tube under temperature of 950 o C. After diffusion for 200 hours, Cr 2+ ion-doping concentration reached 10 19 /cm 3 . The disk has a diameter of 15mm and a thickness of 1.7mm.…”

Structural and optical properties of Tm:Y2O3 transparent ceramic with La2O3, ZrO2 as composite sintering aid

“…[1][2][3][4] Traditional host materials for Tm 3+ active ion are YAG single crystals, [5][6][7] which have been highly developed because of their easy fabrications and profound investigations. Some other Tm 3+ doped crystals such as vanadates 8 and YAP single crystals have been investigated.…”