High-conversion-efficiency tunable mid-infrared BaGa₄Se₇ optical parametric oscillator pumped by a 279-μm laser

Intracavity-Pumped, Mid-Infrared Tandem Optical Parametric Oscillator Based on BaGa4Se7 Crystal

“…Overall, due to the much higher energy intensity of the tunable λ1 oscillated in the cavity, the tandem OPO with M5 was obviously optimum for the generation of mid-infrared wave. Compared with the recent experimental results of ZGP-OPO and BGSe-OPO [34], [21], the conversion efficiency and slope efficiency were limited by the ∼1 μm pump in our experiment. This was attributed to the large quantum defect under short pump wavelength.…”

Temperature distribution and the laser performance of LD end-pumped LuYSGG/Er:LuYSGG composite crystal

“…5 In addition, some nonlinear crystals, such as ZnGeP 2 and CdSe, have low absorption loss in the 2.7-3.0 μm waveband, enabling the 2.7-3.0 μm laser to be utilized as an ideal pumping source for optical parametric oscillation (OPO) and optical parametric generation (OPG) to induce mid and far infrared laser operated at 3.0-5.0 μm and 8.0-14.0 μm, respectively. 6 Some matrix crystals that are suitable for doping with rare earth ions include Y 3 Al 5 O 12 , 7,8 YAlO 3 , 9 Y 3 Ga 5 O 12 , 10 Gd 3 Ga 5 -O 12 , 11 Y 3 Sc 2 Ga 3 O 12 , 12 Gd 1.17 Y 1.83 Sc 2 Ga 3 O 12 , 13 Lu 2 O 3 , Y 2 O 3 , 14,15 CaF 2 , 16 SrF 2 , 17 and LiYF 4 . 18 Among them, the oxide and sesquioxide crystals are favored by researchers owing to their good chemical stability, excellent mechanical property, and high thermal conductivity.…”

“…5 In addition, some nonlinear crystals, such as ZnGeP 2 and CdSe, have low absorption loss in the 2.7–3.0 μm waveband, enabling the 2.7–3.0 μm laser to be utilized as an ideal pumping source for optical parametric oscillation (OPO) and optical parametric generation (OPG) to induce mid and far infrared laser operated at 3.0–5.0 μm and 8.0–14.0 μm, respectively. 6…”

2.79-μm high peak power LiNbO3 acousto-optic Q-switched Er,Cr:YSGG laser with thermal lensing effect compensation

“…Optical parametric oscillator (OPO) can also realize the output and wavelength tuning of mid-infrared laser by pumping nonlinear variable frequency crystal with near-infrared solid state laser. Due to its all-solid state, compact and low price, it has attracted wide attention in recent years [3,4]. To improve the conversion efficiency to the mid-infrared wavelength (3-12-μm wavelength range) and obtain greater output power or energy, mid-infrared pumping sources with short pulse duration and high peak power is desired.…”