Temperature-tunable sapphire windows for reflection loss-free operation of vapor cells

Jahier, Erwan; Guéna, Jocelyne; Jacquier, Ph.; Lintz, Michel; Papoyan, A.; Bouchiat, Marie-Anne

doi:10.1007/s003400000388

Cited by 26 publications

(26 citation statements)

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“…Depending on its parallelism, any cell window behaves more or less as a temperature-tunable Fabry Perot etalon [15]. In the very first cell used for measurements, imperfect parallelism prevented us from obtaining a reflection coefficient lower than ≃ 5 × 10 −2 .…”

Section: Interferences Inside and Between The Windows: Source Of Noisementioning

confidence: 99%

“…We validated this new approach with a 9% precision measurement in 2002. This was published in [14] where we suggested further improvements of the signal over noise ratio (SNR) by using higher quality cell windows allowing better cancellation of the reflected beams [15] as well as a polarization magnifier [16]. These and additional modifications of the set-up together with a tighter control of the systematic effects, have resulted in a much better SNR.…”

Section: Introduction: Goal Of the Experimentsmentioning

confidence: 99%

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Measurement of the parity violating6S−7Stransition amplitude in cesium achieved within2×10−13
Guéna
¹
,
Lintz
²
,
Bouchiat
³

2005
Phys. Rev. A
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87
3
66
0
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We exploit the process of asymmetry amplification by stimulated emission which provides an original method for parity violation (PV) measurements in a highly forbidden atomic transition. The method involves measurements of a chiral, transient, optical gain of a cesium vapor on the 7S − 6P 3/2 transition, probed after it is excited by an intense, linearly polarized, collinear laser, tuned to resonance for one hyperfine line of the forbidden 6S-7S transition in a longitudinal electric field. We report here a 3.5 fold increase, of the one-second-measurement sensitivity, and subsequent reduction by a factor of 3.5 of the statistical accuracy compared with our previous result [J. Guéna et al., Phys. Rev. Lett. 90, 143001 (2003)]. Decisive improvements to the set-up include an increased repetition rate, better extinction of the probe beam at the end of the probe pulse and, for the first time to our knowledge, the following: a polarization-tilt magnifier, quasi-suppression of beam reflections at the cell windows, and a Cs cell with electrically conductive windows. We also present real-time tests of systematic effects, consistency checks on the data, as well as a 1% accurate measurement of the electric field seen by the atoms, from atomic signals. PV measurements performed in seven different vapor cells agree within the statistical error. Our present result is compatible with the more precise Boulder result within our present relative statistical accuracy of 2.6%, corresponding to a 2 × 10 −13 atomic-unit uncertainty in E pv 1 . Theoretical motivations for further measurements are emphasized and we give a brief overview of a recent proposal that would allow the uncertainty to be reduced to the 0.1% level by creating conditions where asymmetry amplification is much greater.

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Section: Interferences Inside and Between The Windows: Source Of Noisementioning

confidence: 99%

Section: Introduction: Goal Of the Experimentsmentioning

confidence: 99%

Measurement of the parity violating6S−7Stransition amplitude in cesium achieved within2×10−13
Guéna
¹
,
Lintz
²
,
Bouchiat
³

2005
Phys. Rev. A
Self Cite
87
3
66
0
View full text Add to dashboard Cite

show abstract

“…In our next Cs cell, their parallelism will be much improved. By temperature tuning [22], an excellent reflection minimum 10 ÿ3 can be achieved and should be accompanied by a strong reduction of the interference noise. For further improvement of the SNR by a factor of 2, magnification of polarization tilts using a dichroic optical component [23], combined with an optimization of the excitation and probe energies, is going to be implemented.…”

mentioning

confidence: 99%

New Manifestation of Atomic Parity Violation in Cesium: A Chiral Optical Gain Induced by Linearly Polarized6S−7SExcitation

et al. 2003

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We have detected, by using stimulated emission, an atomic parity violation (APV) in the form of a chiral optical gain of a cesium vapor on the 7S-6P(3/2) transition, consecutive to linearly polarized 6S-7S excitation. We demonstrate the validity of this detection method of APV, by presenting a 9% accurate measurement of expected sign and magnitude. We stress several advantages of this new approach which fully exploits the cylindrical symmetry of the setup. Future measurements at the percent level will provide an important cross-check of an existing more precise result obtained by a different method.

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“…Later, efforts devoted to the reduction of the noise and of the systematics have improved the statistics, as is obvious from the inset of Fig.2: the standard deviation of the isotropic values recorded in cell #7 is 2.5 times smaller that in cell #1. This has resulted from implementing: -sapphire cells with highly parallel windows [24]. The fraction of the excitation beam reflected at each window can be made very small (10 −3 instead of 5% in cell #1) by choosing a temperature such that the reflection is cancelled by interference.…”

Section: Measurement Proceduresmentioning

confidence: 99%

Pump-probe measurement of atomic parity violation in cesium with a precision of 2.6%

2007

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We present the atomic parity violation measurements made in Cs vapour using a pump-probe scheme. After pulsed excitation of the 6S-7S forbidden transition in the presence of a longitudinal electric field, a laser beam resonant with one of the 7S-6P transitions stimulates the 7S atom emission for a duration of 20 ns. The polarisation of the amplified probe beam is analysed. A seven-fold signature allows discrimination of the parity violating linear dichroism, and real-time calibration by a similar, known, parity conserving linear dichroism. The zero-field linear dichroism signal due to the magnetic dipole transition moment is observed for the first time, and used for in-situ determination of the electric field. The result, ImE pv 1 = (−808 ± 21) × 10 −14 ea0, is in perfect agreement with the corresponding, more precise measurement obtained by the Boulder group. A transverse field configuration with large probe amplification could bring atomic parity violation measurements to the 0.1% accuracy level.

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Temperature-tunable sapphire windows for reflection loss-free operation of vapor cells

Cited by 26 publications

References 1 publication

Measurement of the parity violating6S−7Stransition amplitude in cesium achieved within2×10−13
Guéna
¹
,
Lintz
²
,
Bouchiat
³

2005
Phys. Rev. A
Self Cite
87
3
66
0
View full text Add to dashboard Cite

Measurement of the parity violating6S−7Stransition amplitude in cesium achieved within2×10−13
Guéna
¹
,
Lintz
²
,
Bouchiat
³

2005
Phys. Rev. A
Self Cite
87
3
66
0
View full text Add to dashboard Cite

New Manifestation of Atomic Parity Violation in Cesium: A Chiral Optical Gain Induced by Linearly Polarized6S−7SExcitation

Pump-probe measurement of atomic parity violation in cesium with a precision of 2.6%

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Temperature-tunable sapphire windows for reflection loss-free operation of vapor cells

Cited by 26 publications

References 1 publication

Measurement of the parity violating6S−7Stransition amplitude in cesium achieved within2×10−13Guéna1, Lintz2, Bouchiat3 2005Phys. Rev. ASelf Cite873660View full textAdd to dashboardCite

Measurement of the parity violating6S−7Stransition amplitude in cesium achieved within2×10−13Guéna1, Lintz2, Bouchiat3 2005Phys. Rev. ASelf Cite873660View full textAdd to dashboardCite

New Manifestation of Atomic Parity Violation in Cesium: A Chiral Optical Gain Induced by Linearly Polarized6S−7SExcitation

Pump-probe measurement of atomic parity violation in cesium with a precision of 2.6%

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Product

Resources

About

Measurement of the parity violating6S−7Stransition amplitude in cesium achieved within2×10−13
Guéna
¹
,
Lintz
²
,
Bouchiat
³

2005
Phys. Rev. A
Self Cite
87
3
66
0
View full text Add to dashboard Cite

Measurement of the parity violating6S−7Stransition amplitude in cesium achieved within2×10−13
Guéna
¹
,
Lintz
²
,
Bouchiat
³

2005
Phys. Rev. A
Self Cite
87
3
66
0
View full text Add to dashboard Cite