Stimulated processes in sodium vapour in the presence of molecular buffer gas systems

Konefal, Z.; Ignaciuk, M.

doi:10.1007/bf00278285

Cited by 17 publications

(3 citation statements)

References 17 publications

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“…The collisional energy transfer mechanism is employed in CO 2 lasers, for example, where helium atoms are introduced, to increase the efficiency of the CO 2 lasing process. In atomic alkali metal vapors, the emission is amplified through mixing with helium [45][46][47] to utilize collisional energy transfer for increasing the lasing output.…”

Section: Discussionmentioning

confidence: 99%

Collision Enhanced Raman Scattering (CERS): An Ultra-High Efficient Raman Enhancement Technique for Hollow Core Photonic Crystal Fiber Based Raman Spectroscopy Gas Analyzer

Shirmohammad,

Short,

Zeng

2023

Biosensors

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Raman enhancement techniques are essential for gas analysis to increase the detection sensitivity of a Raman spectroscopy system. We have developed an efficient Raman enhancement technique called the collision-enhanced Raman scattering (CERS), where the active Raman gas as the analyte is mixed with a buffer gas inside the hollow-core photonic-crystal fiber (HCPCF) of a fiber-enhanced Raman spectroscopy (FERS) system. This results in an enhanced Raman signal from the analyte gas. In this study, we first showed that the intensity of the 587 cm−1 stimulated Raman scattering (SRS) peak of H2 confined in an HCPCF is enhanced by as much as five orders of magnitude by mixing with a buffer gas such as helium or N2. Secondly, we showed that the magnitudes of Raman enhancement depend on the type of buffer gas, with helium being more efficient compared to N2. This makes helium a favorable buffer gas for CERS. Thirdly, we applied CERS for Raman measurements of propene, a metabolically interesting volatile organic compound (VOC) with an association to lung cancer. CERS resulted in a substantial enhancement of propene Raman peaks. In conclusion, the CERS we developed is a simple and efficient Raman-enhancing mechanism for improving gas analysis. It has great potential for application in breath analysis for lung cancer detection.

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Section: Discussionmentioning

confidence: 99%

Collision Enhanced Raman Scattering (CERS): An Ultra-High Efficient Raman Enhancement Technique for Hollow Core Photonic Crystal Fiber Based Raman Spectroscopy Gas Analyzer

Shirmohammad,

Short,

Zeng

2023

Biosensors

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“…Atutov et al [9] also presented an adequate theoretical description of this effect. Later in an experiment with sodium vapours, Konefal and Ignaciuk [10] showed that the effect is substantially enhanced when use is made of light hydrocarbons (methane, ethane or ethylene) as a buffer gas (efficient generation of radiation requires fast collisional mixing of the upper levels of alkali metal atoms, which is ensured in using molecular buffer gases). Ethane served as a buffer gas in an experiment [11] with a new object, namely, rubidium.…”

Section: Introductionmentioning

confidence: 99%

Transversely diode-pumped alkali metal vapour laser

Пархоменко

Шалагин

2015

Quantum Electron.

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We have studied theoretically the operation of a transversely diode-pumped alkali metal vapour laser. For the case of high-intensity laser radiation, we have obtained an analytical solution to a complex system of differential equations describing the laser. This solution allows one to exhaustively determine all the energy characteristics of the laser and to find optimal parameters of the working medium and pump radiation (temperature, buffer gas pressure, and intensity and width of the pump spectrum).

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“…[5][6][7][8][9][10][11][12][13]. Numerous theoretical and experimental studies of energy transfer, energy levels mixing, and a three-level lasing in alkalis were performed during that time, [14][15][16][17][18][19][20][21][22][23][24][25][26][27] but an absence of powerful enough narrowband tunable pump laser sources did not allow efficient lasing in alkali vapors until the beginning of the new millennium. The first really efficient lasing in pulsed and continuous wave (CW) operation in Rb and Cs vapors was observed in 2003 to 2005, 28,29 using a Ti:sapphire laser for optical pumping.…”

Section: Introductionmentioning

confidence: 99%

Review of alkali laser research and development

2012

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Abstract. In this review we present an analysis of optically pumped alkali laser research and development from the first proposal in 1958 by Schawlow and Townes to the current state. In spite of the long history, real interest in alkali vapor lasers has appeared in the past decade, after the demonstration of really efficient lasing in Rb and Cs vapors in 2003 and the first successful power scaling experiments. This interest was stimulated by the possibility of using efficient diode lasers for optical pumping of the alkali lasers and by the fact that these lasers can produce a high quality and high power output beam from a single aperture. We present a review of the most important achievements in high power alkali laser research and development, discuss some problems existing in this field, and provide future perspectives in diode pumped alkali laser development.

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Stimulated processes in sodium vapour in the presence of molecular buffer gas systems

Cited by 17 publications

References 17 publications

Collision Enhanced Raman Scattering (CERS): An Ultra-High Efficient Raman Enhancement Technique for Hollow Core Photonic Crystal Fiber Based Raman Spectroscopy Gas Analyzer

Collision Enhanced Raman Scattering (CERS): An Ultra-High Efficient Raman Enhancement Technique for Hollow Core Photonic Crystal Fiber Based Raman Spectroscopy Gas Analyzer

Transversely diode-pumped alkali metal vapour laser

Review of alkali laser research and development

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