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Thermometry in a Gas Discharge Cell of an Optical Wavelength Calibrator
摘要： Temperature and pressure in a sealed Ar cell of an optical wavelength calibrator are measured using diode laser spectroscopy. The values of the thermodynamic parameters allowed determination of the fluctuations of the shift of the argon line at 811.5 nm. The expected fluctuation amplitude appears lower than ±15 MHz. The result obtained indicates the applicability of the studied calibrator as an optical reference and the correctness of previous measurements of pressure shift coefficients of the 811.5 nm argon line.
关键词： thermometry,diode-laser spectroscopy,optical calibrator,low pressure RF discharge,spectral line pressure shift,argon
更新于2025-09-19 17:15:36
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Measurement of pressure shift and broadening for Ar and Kr 4s[3/2]2?→?4p[5/2]3 transition in rare gases using diode-laser spectroscopy
摘要： In this work simultaneous measurements of pressure broadening and shift coe?cients for 811.5 nm Ar and 811.3 nm Kr spectral lines of the 4s[3/2] 2 → 4p[5/2] 3 transition were performed. Assessment of gas temperature was done by determining Doppler width components of the lines’ Voigt pro?les. Pressure shift coe?cients for the mixtures Ar:Ne, Kr:Ne and Kr:Ar were determined for the ?rst time. Their values in units of 10 -10, reduced to 300 K are: β Ar:Ne = -0.51 ± 0.05, β Kr:Ne = -0.65 ± 0.01, β Kr:Ar = -2.07 ± 0.08. Additionally we demonstrated the use of easily available starters for ?uorescent lamps as sealed Ar discharge cells for reference optical frequency.
关键词： Spectral line pressure shift,Radio-frequency discharge,Metastable argon and krypton atoms,Optically pumped all-rare-gas laser,Diode-laser absorption spectroscopy
更新于2025-09-11 14:15:04