Metropolitan-scale heralded entanglement of solid-state qubits.

A key challenge toward future quantum internet technology is connecting quantum processors at metropolitan scale. Here, we report on heralded entanglement between two independently operated quantum network nodes separated by 10 kilometers. The two nodes hosting diamond spin qubits are linked with a midpoint station via 25 kilometers of deployed optical fiber.

Energy-scaling of a diode-pumped Alexandrite laser and prototype development for a compact general-purpose Doppler lidar.

We present design and performance data of an energy-scaled diode-pumped Alexandrite laser in single longitudinal mode operation developed as a beam source in a mobile general-purpose Doppler lidar. A maximum pulse energy in Q-switched operation of 4.6 mJ and a maximum average power of 2.

Rugged diode-pumped Alexandrite laser as an emitter in a compact mobile lidar system for atmospheric measurements.

We present design and performance data of two diode-pumped Alexandrite lasers developed explicitly as laser emitters in mobile potassium resonance lidar systems. The lasers yield an output power of up to 1.75 mJ at a repetition rate of 500 Hz with a beam quality of $M{{^2}} \lt {1.

Diode-pumped cw Alexandrite laser with temporally stable 6.5 W in TEM operation with prospect of power scaling.

We present the design of a longitudinally diode-pumped Alexandrite laser in continuous-wave operation and resulting performance data. A laser power of 6.5 W in fundamental mode operation was measured, which is, to the best of our knowledge, the highest laser power in fundamental mode operation yet reported.

Diode-pumped Q-switched Alexandrite laser in single longitudinal mode operation with Watt-level output power.

We present significantly improved performance data of a diode-pumped -switched Alexandrite laser in single longitudinal mode operation developed as a beam source for resonance lidar systems. The average output power of the laser-operating at the potassium resonance at 770 nm with a linewidth below 10 MHz-could be increased by a factor of five to the Watt-level by means of an optimized resonator design and pump scheme. The pulse energy is 1.

Diode-pumped alexandrite ring laser in single-longitudinal mode operation for atmospheric lidar measurements.

We present, to the best of our knowledge, design and performance data of the first diode-pumped Alexandrite ring laser in Q-switched single-longitudinal mode (SLM) operation. The laser resonator contains two Alexandrite crystals, which are pumped longitudinally by means of two laser diode-bar modules emitting at 636 nm. Single-longitudinal mode operation is achieved by seeding the laser with a diode laser operating in SLM and actively stabilizing the cavity, yielding a linewidth of < 10 MHz at the potassium resonance line at 770 nm.

Composite Bonding Pre-Treatment with Laser Radiation of 3 µm Wavelength: Comparison with Conventional Laser Sources.

To use the full potential of composite parts, e.g., to reduce the structural weight of cars or airplanes, a greater focus is needed on the joining technology.

1.95 μm-pumped OP-GaAs optical parametric oscillator with 10.6 μm idler wavelength.

We report on an optical parametric oscillator that generates output idler wavelengths around 10.6 μm. On the basis of orientation-patterned gallium arsenide (OP-GaAs) as a nonlinear medium and a 1.

Power scaling of supercontinuum seeded megahertz-repetition rate optical parametric chirped pulse amplifiers.

Optical parametric chirped-pulse amplifiers with high average power are possible with novel high-power Yb:YAG amplifiers with kW-level output powers. We demonstrate a compact wavelength-tunable sub-30-fs amplifier with 11.4 W average power with 20.

Dual-wavelength, continuous-wave Yb:YAG laser for high-resolution photothermal common-path interferometry.

We present a continuous-wave (CW) intracavity frequency-doubled Yb:YAG laser providing 1030 and 515 nm output simultaneously. This laser system was designed for photothermal common-path interferometry to measure spatially resolved profiles of the linear absorption in dielectric media and coatings for visible or infrared light as well as of the nonlinear absorption for the combination of both. A Z-shape laser cavity was designed, providing a beam waist in which an LBO crystal was located for effective second-harmonic generation (SHG).

Gain-switched all-fiber laser with narrow bandwidth.

Gain-switching of a CW fiber laser is a simple and cost-effective approach to generate pulses using an all-fiber system. We report on the construction of a narrow bandwidth (below 0.1 nm) gain-switched fiber laser and optimize the pulse energy and pulse duration under this constraint.

Norepinephrine release is reduced by I(1)-receptors in addition to alpha(2)-adrenoceptors.

In pithed spontaneous hypertensive rats, noradrenaline overflow was diminished by moxonidine even when alpha(2)-adrenoceptors were blocked quantitatively using phenoxybenzamine, suggesting an I(1)-receptor-mediated mechanism of noradrenaline release. This hypothesis was confirmed, since the noradrenaline overflow was (1) increased under alpha(2)-adrenoceptors blockade by the mixed I(1)/alpha(2)-antagonists efaroxan or idazoxan, (2) still reduced by moxonidine when both alpha(2)- and I(1)-receptors were blocked, and (3) diminished by agmatine after pretreatment with phenoxybenzamine, but not with AGN192403. An indirect ganglionic I(1)-receptor-mediated mechanism of noradrenaline release is supposed.

Modification of noradrenaline release in pithed spontaneously hypertensive rats by I1-binding sites in addition to alpha2-adrenoceptors.

It is known that moxonidine acts as an agonist at presynaptic alpha(2)-adrenoceptors of the postganglionic sympathetic nerve terminals and leads to a reduction in noradrenaline release. In addition, it is conceivable that I(1)-binding sites located in other regions of the pre- and postganglionic sympathetic neurons are involved in this effect. Our aim was to investigate whether and to what extent activation of the I(1)-binding sites contributes to the moxonidine-induced inhibition of noradrenaline release.

Survival after transmyocardial laser revascularization in relation to nonlasered perfused myocardial zones.

Background: Transmyocardial laser revascularization for severe diffuse coronary artery disease reduces angina significantly. The effect on survival, however, is questionable, and risk factors are not adequately addressed. Considering that transmyocardial laser revascularization channels do not remain patent for improving direct myocardial blood supply, other variables such as perfusion through open native or grafted vessels in remote non-transmyocardial laser revascularization areas are probably more important for survival.