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No broadband lasing medium like Ti:Saph has been demonstrated yet for terahertz radiation. We show that laser-aligned molecules can amplify broadband terahertz radiation, allowing high-energy chirped-pulse amplification at terahertz frequencies.
In-band pumping at 0.88 mum was used to realize Nd-vanadate thin-disk lasers with maximum continuous-wave output power of 14.9 W at 1.06 mum, and to generate 9.1 W output power of green light at 0.53 mum. Results on deep-blue generation are discussed.
We demonstrate 100 GHz continuous tuning and plusmn3 MHz frequency stabilization of the signal radiation delivered by an entangled cavity nanosecond OPO while the frequency fluctuation of the pump radiation is larger than 500 MHz.
We report a continuous-wave, single-longitudinal-mode, singly resonant OPO oscillating at 3.3 mum with 60% pump depletion. We observed optical bistability, thermal guiding, and clamped pump depletion for this OPO.
We present what is believed to be the first Tm:YAG laser pumped ZGP-OPO. Pump energies of 4 mJ and OPO 3-5 mum output energies of 1 mJ were achieved at 100 Hz repetition rate.
We have experimentally studied the pulse-to-pulse instability in Nd:Sc3(BO3)4 random laser. The increase of the instability at the threshold and its reduction at further increase of pumping is in line with the theoretical predictions.
A simple fused silica light-guide assembly transmits 6 W concentrated solar power to a 2D-CPC cavity. The calculated laser power of 75.8 W is obtained for a 4 mm diameter Nd:YAG rod, reaching the conversion efficiency of 11W/m2.
We report on synchronously pumped OPOs with intracavity SHG or SFG in the same MgO:PPLN crystal. At e.g. 590 nm an output power of 190 mW was obtained with 140 fs pulses at a repetition rate of 81 MHz.
Tuned by a variable reflective mirror, we achieve 71.2-W free-running and 30-W maximum average power in range of 1866-2107 nm in Tm-doped fiber lasers. Watt-level powers are generated from single crystal and ceramic Cr2+:ZnSe disk lasers.
We study the characteristics of a low-loss type-II phase matched synchronously-pumped DRO. Numerical simulations using a split-step Fourier method agree well with experimental results.
Waveguides were fabricated inside a Bi-doped silica glass using ultrafast laser inscription. When optically pumped at 980 nm, ultra-broadband gain was measured from the waveguides, paving the way for compact ultra-broadband optical amplifiers.
We used a bismuth-doped fiber with high pump absorption, 1.2 dB/m, to make a short (25 m) Bi-fiber laser at 1.16 mum with 10% efficiency. We discuss the influence of host glass and unsaturable absorption.
The emission of high-Q c-Er2O3 resonators displays little inhomogeneous broadening, robust vacuum-Rabi splitting, and strong upconversion. Considering these effects and a rate-equation model, we analyze the prospects for optically pumped on-chip lasing using c-Er2O3.
As a pump laser of a Ti:sapphire femtosecond laser, the authors developed high power, high repetition rate and highly stable Yb:YAG thin disk green laser. We achieved 200 kHz, 73 W operation.
An efficient OP-GaAs OPO pumped by a high repetition rate (20-50 kHz) Q-switched Ho:YAG laser is presented. The slope efficiency is 53% at 20 kHz. Influence of pump polarization on OPO performance is tested.
We have realized palmtop and tunable THz-wave parametric generator and observed output THz-wave with tuning range of 1-3 THz, with power of more than 100 mW (peak), linewidth of less than 10 GHz.
We present an all-fiberreg pump combiner with 32 ports. This device is designed to provide high isolation providing intrinsic pump protection. We demonstrated that over 200 W of pump power can be deliver in 20/400 mum fiber.
Thermal lens shaping for astigmatism compensation is extended to a 65 MHz, diode-pumped Yb:KGW oscillator mode-locked with the aid of a saturable Bragg reflector to yield 250fs (347fs) pulses at an output power of 3.5 W (5W).
We report for the first time the phase matching properties of a new negative uniaxial crystal, CdSiP2, which can be pumped at 1 or 1.5 microns to generate mid-IR output in the 2-9 mum spectral range.
Refractive index changes induced by pump-signal operation in commercial Yb-doped fibers are shown to be of electronic origin with a strong contribution of UV-transitions to the polarizability difference explored for testing wavelength of 1460-1620 nm.
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