Laser and Microwave Generations in Nitrogen

Kekez, M. M.

doi:10.1109/tps.2018.2796304

Cited by 4 publications

(3 citation statements)

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“…To avoid the interference problems mentioned in [5], the laser signals recorded by the photodiode have been viewed with the aid of a low (150 MHz)-pass filter.…”

Section: Diagnosticsmentioning

confidence: 99%

“…To explore the importance, the nine-stage Marx generator of 18-internal impedance was used in [5]. The electromagnetic radiation pulses were observed both at the single microwave frequency close to 1 GHz and the pulses of long duration (<220 ns) at 337.1 nm (= prominent N 2 laser line) in the pressure range from 100 to 200 torr in nitrogen, and also in air, without the use of the laser resonator and mirrors.…”

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confidence: 99%

“…The electromagnetic radiation pulses were observed both at the single microwave frequency close to 1 GHz and the pulses of long duration (<220 ns) at 337.1 nm (= prominent N 2 laser line) in the pressure range from 100 to 200 torr in nitrogen, and also in air, without the use of the laser resonator and mirrors. These radiation pulses can be considered as the coherent radiation due to the maser action and the laser action, respectively [5].…”

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confidence: 99%

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Nitrogen Laser Emissions of Short and Long Durations Generated in Air

Kekez

Villeneuve

2020

IEEE Trans. Plasma Sci.

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This article describes two sets of experiments. An eight-stage, pulse-forming network (PFN) Marx generator of 50-internal impedance produces a "square"-shaped voltage waveform and induces multiphoton ionization, excitation of molecules and ions to generate laser pulses of long (<3 μs) and short (∼10 ns) durations in air, when the principal laser line of the N 2 laser at 337.1 nm was observed. The visible blue laser lines coming from the first negative band of N + 2 ions due to the B 2 + u →X 2 + g transition at 391.4 and 427.8 nm were studied. The wideband (300-800 nm) Schott BG 39 interference filter was also employed to examine whether some other lines participate in the emission being generated. The scaling law was derived describing the attenuation of the emission versus the distance for long-duration pulses (<3 μs) at 337.1 nm. The second set of experiments was introduced to support the data obtained. It offers information pertinent to the visible blue line emissions as well as to the photoionization processes, lighting phenomena, and processes occurring at high altitudes.

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“…To avoid the interference problems mentioned in [5], the laser signals recorded by the photodiode have been viewed with the aid of a low (150 MHz)-pass filter.…”

Section: Diagnosticsmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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