ABSTRACT
A millijoule-level high pulse energy picosecond (ps) mid-infrared (MIR) optical parametric amplifier (OPA) at 3.9 µm based on large-aperture MgO-doped periodically poled lithium niobate (MgO:PPLN) crystal was demonstrated for the first time, to the best of our knowledge. The MIR OPA was pumped by a 30 ps 1064 nm Nd:YAG laser at 10 Hz and injected by an energy-adjustable near-infrared seed based on a barium boron oxide (BBO) optical parametric generator/optical parametric amplifier (OPG/OPA) with double-pass geometry. Output energy of 1.14 mJ at 3.9 µm has been obtained at pump energy of 15.2 mJ. Furthermore, the performance of MIR OPG in MgO:PPLN was also investigated for comparing with the seeded OPA.
ABSTRACT
We report a high-power diode-laser (LD) side-pumped rod Tm:YAG laser of around 2 µm. The laser was water-cooled at 8°C and yielded a maximum output power of 267 W at 2.07 µm, which is the highest output power for an all solid-state cw 2.07 µm rod Tm:YAG laser reported as far as we know. The corresponding optical-optical conversion efficiency was 20.7%, and the slope efficiency was about 29.8%, respectively.
Subject(s)
Lasers, Solid-State , Thulium , Equipment Design , Equipment Failure AnalysisABSTRACT
A high efficiency and high peak power picosecond (ps) mid-infrared optical parametric amplifier with a new nonlinear crystal BaGa(4)Se(7) pumped by a 30 ps 1064 nm Nd:YAG laser is demonstrated for the first time. The maximum photon conversion efficiency of 56% from 1064 nm to 3.9 µm idler has been achieved at the pump energy of ~1.8 mJ. A maximum idler output of 830 µJ at 3.9 µm with peak power of ~27 MW was obtained at pump energy of ~9.1 mJ. Moreover, a 3-5 µm idler tuning range was demonstrated, with output energies of ~300 µJ at 5 µm and up to 1 mJ at 3 µm at ~8.2 mJ pump energy.
ABSTRACT
We report a high-power diode-side-pumped rod Tm:YAG laser operated at either 2.07 or 2.02 µm depending on the transmission of pumped output coupler. The laser yields 115W of continuous-wave output power at 2.07 µm with 5% output coupling, which is the highest output power for all solid-state 2.07 µm cw rod Tm:YAG laser reported so far. With an output coupler of 10% transmission, the center wavelength of the laser is switched to 2.02 µm with an output power of 77.1 W. This is the first observation of high-power wavelength switchable diode-side-pumped rod Tm:YAG laser around 2 µm.
