Selection of the discharge-tube material for a nitrogen longitudinal-discharge ultraviolet laser to ensure the maximum average radiation power

Photochemical decomposition of phenol with a concentration of 5 to 24 mg/L using hydrogen peroxide and ultraviolet irradiation (UV/H2O2) was studied. Xenon flash lamp was chosen as a radiation source. It emits high-intensity continuous-spectrum radiation in a wide wavelength range from 200 to 1000 nm. The effect of the initial concentration of hydrogen peroxide and the source average radiation power on the phenol destruction rate were studied. An extremum in the dependence of the phenol decomposition rate constant on the initial concentration of hydrogen peroxide was found. Kinetic model of the process based on the obtained data was developed. It was tested by predicting phenol destruction rate with the different process parameters and gave good accuracy.

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Повышение мощности и улучшение направленности излучения широкоапертурных гетеролазеров при оптимизации размеров брэгговской решетки

Физика и техника полупроводников ◽

10.21883/ftp.2021.08.51132.08 ◽

2021 ◽

Vol 55 (8) ◽

pp. 659

Author(s):

Н.С. Гинзбург ◽

А.С. Сергеев ◽

Е.Р. Кочаровская ◽

А.М. Малкин ◽

В.Ю. Заславский

Keyword(s):

Physical Interpretation ◽

Radiation Power ◽

Single Mode ◽

Output Radiation ◽

Oscillation Regime ◽

Bragg Structure ◽

Bragg Structures ◽

Mode Oscillation ◽

Selection Of ◽

Output Radiation Power

We investigate the dynamics of heterolasers with finite-length planar Bragg structures. Based on the analysis of the dispersion equation describing the eigenwaves propagation in a Bragg structure, we present a physical interpretation of selection of modes with frequencies higher than the stopband. We demonstrate the improvement of stability by using the Bragg structures with transverse dimensions lower than the width of the active area of DFB heterolasers. As a result, the single-mode oscillation regime is sustained over a wider range of pump levels, and, correspondingly, of the output radiation power.

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Discharge-Tube Material and Ceramic-to-Metal Seal

The High-Pressure Sodium Lamp ◽

10.1007/978-1-349-09196-6_8 ◽

1986 ◽

pp. 227-257

Author(s):

J. J. de Groot ◽

J. A. J. M. van Vliet

Keyword(s):

Discharge Tube ◽

Tube Material ◽

Metal Seal

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45-dB Faraday isolator for 100 W average radiation power

Quantum Electronics ◽

10.1070/qe2000v030n12abeh001878 ◽

2000 ◽

Vol 30 (12) ◽

pp. 1107-1108 ◽

Cited By ~ 18

Author(s):

N F Andreev ◽

O V Palashov ◽

A K Potemkin ◽

D H Reitze ◽

Aleksandr M Sergeev ◽

...

Keyword(s):

Radiation Power ◽

Average Radiation Power ◽

Faraday Isolator

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Calculation of Resonant Radiation Power of a Direct Sodium Lamp With Low Pressure

International Journal of Engineering & Technology ◽

10.14419/ijet.v7i3.19.16993 ◽

2018 ◽

Vol 7 (3.19) ◽

pp. 92

Author(s):

Sveshnikov V.K ◽

Bazarkin A.F ◽

Kurenschikov A.V

Keyword(s):

Cross Section ◽

Discharge Tube ◽

Radiation Power ◽

Low Pressure ◽

Resonance Radiation ◽

Cylindrical Shape ◽

Tube Cross Section ◽

Calculation Technique ◽

Sodium Lamp ◽

Resonant Radiation

They consider the calculation technique for the resonance radiation power of a direct low-pressure sodium lamp with a sickle-shaped discharge tube cross-section. The calculation of the sodium discharge radiation power is difficult in such a tube, as compared with the calculation in a cylindrical shape tube. The dependence of the relative output of sodium discharge resonant radiation occurring in equivalent discharge tubes in the form of a parallelepiped and a cylinder is based on the involvement of the theory by M. Cayless. The obtained results were used to determine the power of DNaO-85M lamp resonant radiation. They presented the scheme of the device to study the influence of the tube geometry on sodium discharge power. It is shown that the power of the resonance radiation generated by an equivalent discharge will be the greater, the larger the cross section of the discharge tube. The discrepancy between the calculated and the experimental data for resonant radiation power determination in a crescent-shaped tube is less than 4%.

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