Characteristics of pulsed discharges in copper bromide and copper HyBrID lasers

Исаев, А. А.; Jones, David R.H.; Little, C.E.; Petrash, G. G.; Whyte, C.G.; Земсков, К И

doi:10.1109/3.585494

Cited by 35 publications

(17 citation statements)

References 23 publications

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“…The investigations of the CuBr laser characteristics in [33,35,36] also demonstrate this similarity in the effect of the two additives. This fact was theoretically justified in [19,23] by showing that almost immediately after addition of hydrogen or hydrogen bromide to the active medium of the CuBr laser the approximately identical concentrations of these impurity molecules are established.…”

Section: Experimental Energysupporting

confidence: 53%

“…These effects of additives are attributed to formation of electrically negative molecules (HBr) with a large cross section for dissociative attachment of electrons [36]. According to this explanation, at the initial instants of the discharge, when the temperature of electrons is not high, the electron attachment rate is higher than the copper ionization rate.…”

Section: Experimental Energymentioning

confidence: 99%

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CuBr-Ne-HBr laser with a high repetition frequency of the lasing pulses at a reduced energy deposition in the discharge

et al. 2015

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Experimental and computer studies of the CuBr laser with periodic-pulse pumping are performed with and without addition of HBr. The analysis based on the numerical simulation reveals how additions improve the lasing characteristics of this laser at both typical (10 to 20 kHz) and higher (up to 100 kHz) excitation pulse repetition frequencies during the operation with a low energy deposition in the discharge. This allows the lasing pulse repetition frequency to be increased in the experiment to 750 kHz, which does not seem to be a limit as yet.

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Section: Experimental Energysupporting

confidence: 53%

Section: Experimental Energymentioning

confidence: 99%

CuBr-Ne-HBr laser with a high repetition frequency of the lasing pulses at a reduced energy deposition in the discharge

et al. 2015

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“…These relative lower intense hyperfine components of yellow lines are more widely separated than those of the green lines, which explains the observed result that the rate of increased linewidth with electrical input power of yellow was more than that of green. Similarly, as the HBr concentration increased, it led to a decrease in interpulse electron density through the increased dissociative attachment process (i.e., e − HBr → H Br − or H − Br) [27,38]. This in turn led to an increase in discharge impedance and hence the electrical energy dumped into the discharge, which were manifested in terms of increased Doppler broadening and hence the laser linewidths.…”

Section: B Analysis and Discussionmentioning

confidence: 93%

Studies on the spectral purity of copper–hydrogen bromide laser radiations

et al. 2013

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This paper presents, for the first time to the best of our knowledge, the linewidth, frequency, and stability characteristics of a copper-HBr laser. These spectral purity attributes were found to be critically linked with the electrical input power and HBr concentration, unlike that of the optical resonator. Variation in green and yellow radiation linewidths from 4 to 4.5 GHz and from 6.5 to 8.8 GHz, linewidth fluctuations from 50 to 150 MHz and from 60 to 530 MHz as well as frequency fluctuations from 10 to 100 MHz and from 410 to 10 MHz were observed when varying the input power and HBr concentration. These results are comprehensively analyzed in terms of isotopic shift, hyperfine splitting, line broadening, and temperature and gain distribution effects relevant to this laser.

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“…This is determined by the fact that in such regime with the frequency increase the cumulative effects play a negative role. Previously in [13] it was shown that the HBr addition could decrease the prepulse electron density and create the favorable conditions for laser level pumping. Because of this the laser generation power increased greatly [14].…”

Section: Resultsmentioning

confidence: 99%