Pressure broadening and collisional shift of the Rb D2 absorption line by CH4, C2H6, C3H8, n-C4H10, and He

Zameroski, Nathan D.; Hager, Gordon D.; Rudolph, Wolfgang; Erickson, Christopher; Hostutler, David A.

doi:10.1016/j.jqsrt.2010.08.016

Cited by 34 publications

(13 citation statements)

References 24 publications

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“…Expected frequency shifts due to collisions between Rb atoms and background gas in the cell can be estimated from previous shift measurements (Rb-Rb collisions 30 and Rb collisions with noble gases 31,32 ). At room temperature the pressure of Rb inside the cell is about 1 × 10 −6 Torr; background gas pressure is also taken to be at this level given that it is unknown.…”

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confidence: 99%

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Absolute frequency references at 1529 and 1560 nm using modulation transfer spectroscopy

et al. 2015

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We demonstrate a double optical frequency reference (1529 and 1560 nm) for the telecom C-band using 87Rb modulation transfer spectroscopy. The two reference frequencies are defined by the 5S(1/2)F=2→5P(3/2)F'=3 two-level and 5S(1/2)F=2→5P(3/2)F'=3→4D(5/2)F''=4 ladder transitions. We examine the sensitivity of the frequency stabilization to probe power and magnetic field fluctuations, calculate its frequency shift due to residual amplitude modulation, and estimate its shift due to gas collisions. The short-term Allan deviation was estimated from the error signal slope for the two transitions. Our scheme provides a simple and high performing system for references at these important wavelengths. We estimate that an absolute accuracy of ∼1 kHz is realistic.

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confidence: 99%

“…At these pressures, the expected frequency shifts for both Rb-Rb and Rb-noble gas collisions is < 1 kHz. A higher background pressure (e.g., He in air, about 5 ppmv or 4 mTorr) would still only cause a shift of about 2 kHz 31 .…”

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confidence: 99%

Absolute frequency references at 1529 and 1560 nm using modulation transfer spectroscopy

et al. 2015

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“…To compare theory with experiment for a compact cell, we used a micro-fabricated 1 × 1 × 1 mm 3 isotopically enriched 87 Rb cell [27]. The isotopic abundance of 85 Rb was found by transmission spectroscopy to be (1.00 ± 0.02)%, in a similar way to that shown in ref. [32].…”

Section: Methodsmentioning

confidence: 60%

“…Experimental and theoretical Faraday-filter spectra on the rubidium D2 line as a function of linear detuning (∆/2π) from the weighted line-centre (384.23042812 THz [76,77]). A 1 mm length vapour cell was used with an isotopic ratio of 99% 87 Rb to 1% 85 Rb. The solid black line in panel (a) shows the experimental filter spectrum and the dashed (red) line shows the fit to theory that includes the natural, self, and buffer gas induced (Γ buf ) Lorentzian broadening effects.…”

Section: Results For Wing and Line-centre Filtersmentioning

confidence: 99%

Effect of line broadening on the performance of Faraday filters

Zentile,

Mathew,

Whiting

et al. 2015

Preprint

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We show that homogeneous line broadening drastically affects the performance of atomic Faraday filters. We use a computerized optimization algorithm to find the best magnetic field and temperature for Faraday filters with a range of cell lengths. The effect of self-broadening is found to be particularly important for short vapour cells, and for 'wing-type' filters. Experimentally we realize a Faraday filter using a micro-fabricated 87 Rb vapour cell. By modelling the filter spectrum using the ElecSus program we show that additional homogeneous line broadening due to the background buffer-gas pressure must also be included for an accurate fit.

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“…K, Rb and Cs: self broadening of principal series (E) (Vadla et al 2009). Rb: 5s-5p D2 line, broadening by He, CH 4 , C 2 H 6 , C 3 H 8 , n-C 4 H 10 (E) (Zameroski et al 2011). Cs: 6s-6p D2 line, broadening by 3 He, H 2 , HD, D 2 , N 2 , CH 4 , C 2 H 6 , CF 4 (E) (Pitz et al 2010).…”

Section: Broadening By Neutral Atoms and Moleculesmentioning

confidence: 99%

Division Xii / Commission 14 / Working Group Collision Processes

Peach¹,

Dimitrijević²

2011

Proc. IAU

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Research in atomic and molecular collision processes and spectral line broadening has been very active since our last report, Peach, Dimitrijević & Stancil 2009. Given the large volume of the published literature and the limited space available, we have attempted to identify work most relevant to astrophysics. Since our report can not be comprehensive, additional publications can be found in the databases at the web addresses listed in the final section. Elastic and inelastic collisions among electrons, atoms, ions, and molecules are included and charge transfer can be very important in collisions between heavy particles.

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Pressure broadening and collisional shift of the Rb D2 absorption line by CH4, C2H6, C3H8, n-C4H10, and He

Cited by 34 publications

References 24 publications

Absolute frequency references at 1529 and 1560 nm using modulation transfer spectroscopy

Absolute frequency references at 1529 and 1560 nm using modulation transfer spectroscopy

Effect of line broadening on the performance of Faraday filters

Division Xii / Commission 14 / Working Group Collision Processes

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