The continuous control of output power of a CuBr laser by a pulsed external magnetic field

Behrouzinia, S.; Salehinia, D; Khorasani, K.; Farahmandjou, Majid

doi:10.1016/j.optcom.2018.12.016

Cited by 10 publications

(3 citation statements)

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“…With increasing temperature the mean particle size decreases from 26 nm to 10 nm because of PVP surfactant. [38][39][40][41][42][43][44][45][46][47] Figure 3 TEM analysis was carried out to confirm the actual size of the particles, their growth pattern and the distribution of the crystallites. Figure 5 shows the assynthesized TEM image of sphere-like shaped of Al 2 O 3 nanoparticles prepared by precipitation route.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and characterisation of Al2O3 nanoparticles as catalyst prepared by polymer co-precipitation method

Farahmandjou

Golabiyan

2019

Mater Eng Res

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Alumina (Al 2 O 3) is a very interesting material with broad applicability as a support for various catalytically active phases and ceramic materials. Aluminium oxide (Al 2 O 3) nanoparticles were synthesized by aluminium chloride hexahydrate as precursor and polyvinylpyrrolydon (PVP) as surfactant and polymer agent. The samples were characterized by high resolution transmission electron microscopy (HRTEM), field effect scanning electron microscopy (FESEM), X-ray diffraction (XRD) and electron dispersive spectroscopy (EDS). XRD pattern exhibited gamma-Al 2 O 3 to alpha-Al 2 O 3 structural phase transition in the samples. The mean diameter of sphere-like as-prepared nanoparticles was around 26 nm and mean diameter of annealed sample was around 10 nm as estimated by XRD technique and direct HRTEM observation. The surface morphological studies from SEM depicted the size of alumina decreases with increasing annealing temperature. The effect of PVP surfactant on the morphology of the alumina nanoparticles has been investigated. EDS showed peaks of aluminium and oxygen in prepared Al 2 O 3 .

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Section: Resultsmentioning

confidence: 99%

Synthesis and characterisation of Al2O3 nanoparticles as catalyst prepared by polymer co-precipitation method

Farahmandjou

Golabiyan

2019

Mater Eng Res

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“…The morphology of the samples show that the samples change from rod-shape to fern-like Fe 2 O 3 @ZnO nanoleaves after heat treatment [70] . In fact, the PVP and EG stabilizers are removed by annealing process and the atomic and molecular interactions change between particles that lead the fern-like nanoleaves formation [72][73][74][75][76][77] .…”

Section: Introductionmentioning

confidence: 99%

Study of α-Fe2O3@ ZnO nanoleaves: Morphological and optical study

Khalili

Farahmandjou

2020

Mater Eng Res

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In this paper, α-Fe2O4@ZnO nanoparticles (NPs) were synthesized by coprecipitation method in the presence of PVP and EG surfactants. The samples were charactrized by x-ray fluorescence (XRF), x-ray diffraction (XRD), scanning electron microscopy (SEM), high resolution transmission electron microscopy (HRTEM), and fourier transform infrared spectroscopy (FTIR). The XRD results exhibited rhombohedral α-Fe2O3 and wurtzite structure of ZnO. The SEM images showed that the NPs changed from rod-shape to nanoleaves particles after heat treatment. The TEM studies displayed the formation of Fe2O3@ZnO core-shell of as-synthesized NPs. The stretching vibrations peaks in FTIR in the wavenumber of 532 cm-1 and 473 cm-1 ascribed to the Fe and Zn groups. The XRF data indicated decreasing of the Fe weight percent from 22 %Wt. to 25 %Wt., after heat treatment.

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“…В работе мощность источника накачки ограничивается 1 kW, что для газоразрядной трубки (ГРТ) такого объема является недостаточным. В [7] показана возможность непрерывного управления энергией лазера на парах бромида меди малого объема с помощью магнитного поля.…”

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CuBr-лазер большого объема c возможностью непрерывного управления энергией генерации

Тригуб¹,

Троицкий²

2020

Письма В Журнал Технической Физики

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The paper presents the results of research and development of the copper bromide active element with continuous control of the each pulse energy. Distinctive features are the implementation of the continious control mode for a large-volume gas discharge tube (more than 1.5 L) and the radiation formation by an unstable resonator. In this case, a hydrogen-containing additive was used to modify the plasma kinetics in order to increase the radiation power. The control was carried out through the use of an additional preionization pulse. The dependences of the generation power on each line on the preionization pulse energy and the time delay between this pulse and the excitation pulse are obtained. It is shown that in the developed layout, the determining factor in pulse energy controlling is the population of metastable levels of copper atoms.

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The continuous control of output power of a CuBr laser by a pulsed external magnetic field

Cited by 10 publications

References 20 publications

Synthesis and characterisation of Al2O3 nanoparticles as catalyst prepared by polymer co-precipitation method

Synthesis and characterisation of Al2O3 nanoparticles as catalyst prepared by polymer co-precipitation method

Study of α-Fe2O3@ ZnO nanoleaves: Morphological and optical study

CuBr-лазер большого объема c возможностью непрерывного управления энергией генерации

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