A helium-xenon gas-discharge fiber laser based on hollow-core is demonstrated for the first time. Being pumped by a pulsed microwave radiation at 2.45 GHz in slot antenna configuration, operates 2.03 μm quasi-continuous-wave mode with output power of ∼2 mW. The performance depends strongly pressure gas mixture and mole fraction Xe atoms. results obtained opens up new opportunities developing type lasers that can potentially generate wide spectral range from ultraviolet to mid-infrared...

A 2.03 μm gas-discharge fiber laser based on atomic xenon is investigated. Various gas mixtures, such as He–Xe, Ar–Xe, He–Ar–Xe, and He–Ne, are studied by optical emission spectroscopy. The possibility of extending generation further into the mid-infrared range analyzed.

To excite plasma in the core of a hollow fiber, scheme similar to slot antenna wall metal microwave waveguide was proposed and implemented. An analytical estimate magnitude electric field region where fiber with is placed has been obtained. Using scheme, possibility maintaining argon diameter as small 110 μm demonstrated. The total length column hollow-core up 25 cm at Ar pressure ~10 Torr. frequency radiation used 2.4 GHz, average generated power below 20 W. obtained luminescence spectra...

A multilayer antireflection coating for diamond optics that allows work in the infrared spectral range of 8 –12 µm with minimal optical losses is developed. The transmittance a chemical vapour deposition plate coated this film on both sides exceeds 94% over whole specified wavelength range. coatings deposited were damage-tested by coherent-wave and pulsed (τ = 90 ns) CO2 lasers. Results tests demonstrated can withstand prolonged radiation loads intensity above 3 MW cm−2 continuous-mode laser...

The characteristics of the radiation a planar Xe laser excited by transverse RF discharge at frequency 40.68 MHz with diffusive cooling active medium and nonselective optical cavity have been investigated. spectral power experimentally studied as functions interelectrode-gap width (1.4 — 2.5 mm), composition pressure (30 100 Torr) working gas mixture, input density (0.4 34 W cm-3), electrode temperature. output was found to decrease an interelectrode gap above 1.6 mm. threshold pump 12...

Radiation characteristics of planar diffusion-cooled CO₂- and CO-lasers created using the same design excited by a RF discharge at frequency 40 MHz have been studied. A single-mode cw lasing power ~ 100 W has achieved with an efficiency 10 % for CO₂-laser diffraction-limited radiation divergence 4 - 7 mrad. For CO-laser electrode temperature -65 °C, output 60 10% in wavelength range 5.3 6.0 μm.

The radiation characteristics of a planar CO2 laser excited by diffusion-cooled rf discharge at frequency 40 MHz are studied. A single-mode cw lasing power ≈50 W is achieved with an efficiency ≈10% for nearly diffraction-limited divergence 4—7 mrad. spatial structure, output power, stability and quality studied as functions longitudinal angular alignments the resonator mirror two types hybrid unstable-waveguide resonators laser. It shown that corresponding to negative branch diagram,...

The radiation parameters of a diffusion-cooled compact slab CO2 laser pumped by microwave discharge at frequency 2.45 GHz are studied. A magnetron from domestic oven is used as the pump source. An average output power 25 W and an efficiency ∼13% obtained wavelength 10.6 μm. peak 580 achieved for 20-μs pulses emitted pulse repetition rate 400 Hz. dependence on input in range 0.8–8 kW, composition pressure working mixture duration studied experimentally. Optimal relations between these...

Abstract The characteristics of planar repetitively pulsed diffusion-cooled HF, DF, HF – Xe, and DF Xe(Kr) lasers pumped by a microwave discharge (2.45 GHz) are studied depending on the pump pulse duration (10 40 μs) repletion rate (50 400 Hz), as well composition pressure working gas mixture (30 200 Torr) at low (to 0.6 L s −1 ) flow rates. It is demonstrated for first time that Xe gas-discharge laser may simultaneously operate chemical molecular recombination based xenon atom transitions...

The properties of a cw planar CO laser with an unstable resonator and additional optical elements located outside the working model were studied experimentally using numerical simulation. It is shown that it possible to increase output power control spectral characteristics by acting on peripheral region resonator.

A planar repetitively pulsed microwave-pumped CO2 laser with discharge channel lengths of 250 and 470 mm is experimentally investigated. An average power 60 W at a wavelength 10.6 μm attained. peak 1300 reached in the regime. The dependences shape energy pulse on introduced power, working gas mixture composition pressure, pump-pulse repetition rate width are analysed.

Recently, two completely different types of lasers—a fiber laser and a gas-discharge laser—were combined into single device by demonstrating 2.03 µm generation in He-Xe plasma that was produced microwave discharge directly inside hollow-core fiber. This new type laser—a laser—provides excellent opportunities to greatly enrich the wavelength range operation lasers. In this work, we investigate He-Kr gas mixture as an active medium laser. As result, is demonstrated for first time. The pumped...

An output power of CO-lasers has been studied for operation at room temperature the cooling running water from +7 to +16°C. A cw 41 W stable resonator and 21 unstable achieved. The new configuration hybrid waveguide-unstable optical with external additional mirror lasers is proposed realized. We carried out experiments about possibility optimization coupling coefficient aid mirror, that plane-parallel plate different reflection coefficients.

A 40 MHz RF discharge excited planar cw CO2 laser with the near diffraction limited output power up to 50 W and efficiency of 8.5% is studied. Two schemes hybrid resonators as positive, negative branches stability diagram are used. The spatial characteristics beam studied for both resonator cavities.

An investigation was made of a sealed waveguide CO2 laser excited by an rf field at three fixed frequencies: 40,93, and 152 MHz. The pump power the different frequencies kept constant controlling circuit matching impedances rf-field source. For specific model, optimal excitation frequency range (93 MHz) established trial error. This characterized lowest value discharge parameter Eeff /N maximum output (6 W). analysis characteristic features discharges due to additional control parameter,...

The radiation of planar RF-excited CO- and CO <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> -lasers with an unstable resonator one coupling element is spatially superimposed. divergence emission spectrum are investigated. It shown that in it possible, by acting on the peripheral part composite resonator, to increase output power lower lasing threshold.

Performance of a planar cw CO₂-laser excited by RF waves at two fixed frequencies 40 and 125 MHz is studied. A laser output power 100 W efficiency about 10% have been achieved, the influence excitation frequency has The hybrid waveguide-unstable optical resonators were used in laser.