International Comparison of Iodine Cells

Chartier, J. M.; Picard-Fredin, S.; Chartier, A.

doi:10.1088/0026-1394/29/5/006

Cited by 43 publications

(36 citation statements)

References 13 publications

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“…The uncontrolled 129 I contamination of iodine cell used for laser frequency stabilization is a possible source of additional errors in stabilized laser frequency reproducibility [12]. The impact of uncontrolled 129 I contamination in uncertainty budget is comparable with impact of the rest known factors at the 129 I contamination level as small as 0.25 % of 127 I 2 concentration [21].…”

Section: Laser Fluorescence Test Of Iodine Cell For Iodine-129 Contammentioning

confidence: 97%

“…The iodine cells were of subject of a number investigations [916]. The international comparision of iodine absorption cells [3,12,14] conforms that observed frequency shifts of the hyperfine components in iodine are strongly linked to impurities in the iodine cells. Therefore, the development of improved iodine cell preparation technologies and accurate cell testing is rather important for advanced metrology lasers.…”

Section: Iodine Cell Design and Preparationmentioning

confidence: 99%

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Design and testing of iodine cells for metrological laser application

Negriyko¹

2003

Semicond. Phys. Quantum Electron. Optoelectron.

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The design and performance of iodine vapor cells for frequency stabilized laser applications are presented. The traditional design of iodine vapor cell and special development of cell for fluorescence applications are studied. The sets of eight iodine cells developed and filled in Institute of Physics NAS Ukraine were tested in the He-Ne/ 127 I 2 frequency stabilized lasers. The nonlinear resonance width and contrasts for different cells were measured. The beat frequency method was used for study of laser output frequency differencies for lasers stabilization using different cells. The results of iodine cells testing shown that for glass cells prepared more than 8 years ago the resonance width is appr. 2.2 MHz and frequency differencies are in the rather narrow area ≤ 15 kHz. The standard uncertainty of the frequency stabilized He-Ne/ 127 I 2 lasers is 11.7 kHz. The tests shown that developed cells meet the demands to applications in metrological lasers.

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Section: Laser Fluorescence Test Of Iodine Cell For Iodine-129 Contammentioning

confidence: 97%

Section: Iodine Cell Design and Preparationmentioning

confidence: 99%

Design and testing of iodine cells for metrological laser application

Negriyko¹

2003

Semicond. Phys. Quantum Electron. Optoelectron.

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“…Figure 3 shows the results obtained for the period 1993-2000. Of the seventy-two lasers measured the frequencies of only eleven were outside the 1 uncertainty (12 kHz corresponding to 2.5 x lOl 1) when they met the values of the parameters which affect the laser frequency values given in themise en pratique of 1992 [8][9][10][11][12][13][14]. Nevertheless, the frequency of these eleven lasers was inside the 3 limit.…”

Section: Uncertainty Budgetfor a Two-laser Comparisonmentioning

confidence: 99%

I 2 -stabilized 633-nm He-Ne lasers: 25 years of international comparisons

Chartier

2001

SPIE Proceedings

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Following a recommendation made by theComité International des Poids et Mesures in 1983, the 17th Conference Générale des Poids et Mesures adopted a new definition of the metre based on the speed of light and introduced the ')nise en pratique' a set of experimental procedures giving a list of recommended wavelengths and their associated uncertainties for the practical realization ofthe metre. At the time the most widely used radiation in the world for over ten years was that around 633 nm using an iodine-stabilized He-Ne laser. Results covering a 25-year period of international comparisons between lasers from forty-two national metrology institutes and those of the Bureau International des Poids et Mesures are presented. The information from these comparisons was used to establish the originalmise en pratique of 1983 and their subsequent revisions in 1992 and 1997 incorporating the progress and improvements in techniques made in the interim. In 1997, all these comparisons were included in a programme of key comparisons which were then assimilated into a key comparison database as required by the Mutual Recognition Arrangement (MRA) signed in Paris in 1999; the ongoing key comparison is designated BIPM.LKb. Of seventy-two measured lasers from thirty-seven countries, only eleven lasers had their frequencies outside the uncertainty given in the mises en pratique of 1992 and 1997. At a time when promising major developments are taking place in the field of optical frequency standards, it is an appropriate moment tosummarize the present status of the practical realization of the metre in the international context.

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“…These include the amplitude of the laser frequency modulation, 11 the iodine pressure, 11 the laser intracavity power, 11 the wavefront geometry, 12 gas lens effects, 13 and contamination of the iodine cell. 14 …”

Section: Performance: Frequency Comparison Of the Ro2 And Bipmlasersmentioning

confidence: 99%

Iodine‐stabilized He‐Ne laser at λ=633 nm: design and international comparison

Popescu

Chartier

1996

Opt. Eng

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A portable He-Ne laser at 633 nm, frequency stabilized by saturated absorption in 127 I 2 and built at the Institute for Atomic Physics, Institute for Physics and Technology of Radiation Devices is discussed. The construction of laser head and electronic servo control unit is described. The principle of the arrangement of the electronic circuits in the electronic unit and the tuning procedure of the chosen components are presented. Recent results of an international comparison held at Bureau International des Poids et Mesures (BIPM) was used to characterize the performance of the RO.2 laser against the BIPM4 laser. The mean laser frequency difference calculated on a set of 13 matrix determinations was: ⌬ϭ RO.2 Ϫ BIPM4 ϭϪ1.23 kHz with a repeatability of R( RO.2 )ϭϮ6.8 kHz. The frequency stability expressed as relative Allan variance for sampling time, ϭ10 2 s, was calculated from a 40,000-s time interval as ()/ϭ1.78ϫ10 Ϫ12 . All measurements were made under the restrictions of the Recommendation 3 (CI-1992) for the lasers suitable for the practical realization of the meter.

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International Comparison of Iodine Cells

Cited by 43 publications

References 13 publications

Design and testing of iodine cells for metrological laser application

Design and testing of iodine cells for metrological laser application

I 2 -stabilized 633-nm He-Ne lasers: 25 years of international comparisons

Iodine‐stabilized He‐Ne laser at λ=633 nm: design and international comparison

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