Precise Frequenccy Measurements of CO2/OsO4 and HeNe/CH4-Stabilized Lasers

Clairon, A.; Dahmani, B.; Filimon, Adrian; Rutman, J.

doi:10.1109/tim.1985.4315320

Cited by 64 publications

(20 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The frequencies of the LD͞Rb lasers have been measured at the LPTF with a frequency chain which connects the LD͞Rb laser at 385 THz to a standard at 29 THz, which is a CO 2 laser stabilized to an osmium tetraoxyde line (CO 2 ͞OsO 4 ). This standard had been previously measured with an uncertainty of 70 Hz [6]. The details of this frequency chain will be published shortly [7].…”

mentioning

confidence: 99%

Absolute Frequency Measurement of the2S−8S/DTransitions in Hydrogen and Deuterium: New Determination of the Rydberg Constant

et al. 1997

View full text Add to dashboard Cite

We have performed a pure optical frequency measurement of the 2S-8S͞D two-photon transitions in atomic hydrogen and deuterium. These frequencies are directly compared to a new frequency standard, a diode laser stabilized to a two-photon transition at 778 nm in rubidium. We deduce a new value for the Rydberg constant, R` 109 737.315 685 9͑10͒ cm 21 with an uncertainty of 9 3 10 212 . From the isotope shift, we derive a precise value of the 2S Lamb shift in deuterium ͓L 2S-2P 1059.230͑9͒ MHz͔ and the difference of the quadratic charge radii of deuteron and proton. [S0031-9007(96)02260-0] PACS numbers: 31.30.Jv, 06.20.Jr, 21.10.Ft Hydrogen is the simplest atom, and its properties have been calculated very precisely: quantum electrodynamics (QED) calculations have continuously improved to achieve an impressive accuracy, currently of order 10 211 [1]. At the same time, experimental measurements in hydrogen have been performed at a comparable level of precision to deduce the Rydberg constant and to test the QED calculations [2]. Recently, the interferometric measurements have been superseded by accurate optical frequency ones. These measurements need frequency-multiplication chains which link the measured frequency via intermediate standard lasers to the cesium clock. With a frequency chain starting from the methane-stabilized helium-neon laser, Hänsch and co-workers measured the frequency of the 1S-2S two-photon transition with an uncertainty of 1.8 3 10 211 [3]. In our group, we built a frequency chain linking the frequencies of the 2S-8S͞D two-photon transitions to two standard lasers (the iodine-stabilized and the methane-stabilized helium-neon lasers) and reached a precision of 1.3 3 10 211 [4]. Here we present a new optical frequency measurement of the 2S-8S͞D transitions in hydrogen and deuterium with a frequencymultiplication chain. The relative uncertainty is reduced to about 6 3 10 212 and provides a more precise value of the Rydberg constant. In deuterium, we give a precise determination of the 2S Lamb shift and, from the isotope shift, we obtain the difference of the squared proton and deuteron charge radii r 2 d 2 r 2 p . Our frequency chain connects indirectly hydrogen frequencies to the cesium clock (see Fig. 1). The experiment is carried out at two different laboratories, the Laboratoire Primaire du Temps et des Fréquences (LPTF) at the Observatoire de Paris and the Laboratoire Kastler Brossel (LKB) in the Université Pierre et Marie Curie, which are linked by two, 3 km long, optical fibers. The cornerstone of this chain is a new standard, namely a laser diode at 778 nm (i.e., n 385 THz) stabilized to the 5S 1͞2 -5D 5͞2 two-photon transition of rubidium (LD͞Rb laser) [5]. The laser diode is used in an extended cavity configuration, the rubidium cell is placed inside an enhancement cavity, and the transition is detected by monitoring the fluorescence from the radiative cascade 5D-6P-5S. The main metrological features of the LD͞Rb laser are a 4 3 10 213 short term stability for 1s integration time and a...

show abstract

mentioning

confidence: 99%

Absolute Frequency Measurement of the2S−8S/DTransitions in Hydrogen and Deuterium: New Determination of the Rydberg Constant

et al. 1997

View full text Add to dashboard Cite

show abstract

“…Instead of the use of long interaction length between the laser radiation and the iodine molecular vapor ("delicate use" in space mission), we propose to insert a very short iodine cell in a low finesse optical cavity (OC). This approach has been proposed in early 1970's by Cole [6], and demonstrated in 1980's by A. Brillet [7] and A. Clairon [8]. Frequency stabilities in the range 10 -14 -10 - 16 have been demonstrated in the IR domain [9,10].…”

Section: Motivation Of This Workmentioning

confidence: 99%

Nd: YAG laser frequency stabilized for space applications

Acef

Clairon

Burck

2019

International Conference on Space Optics — ICSO 2010

View full text Add to dashboard Cite

“…À ce titre, le LNE-SYRTE est impliqué de longue date dans la métrologie ultraprécise des fréquences optiques [10][11][12]. Depuis 2000, ces activités incluent le dé-veloppement d'étalons de fréquence optique à atomes de strontium (Sr).…”

Section: Contribution Du Lne-syrte Au Développement Des Horloges Optiunclassified

Horloge à réseau optique à atomes de mercure

Bize¹,

Chicireanu²,

Dawkins³

et al. 2015

R. franç. métrol.

View full text Add to dashboard Cite

RésuméNous décrivons le développement d'une horloge à réseau optique à atomes de mercure depuis le stade initial jusqu'aux mesures absolues qui ont permis l'inclusion de la transition horloge de 199 Hg dans la liste des valeurs recommandées des fréquences étalons du CIPM. MOTS CLÉS : MÉTROLOGIE DU TEMPS ET DES FRÉQUENCES, ATOMES FROIDS, HORLOGES À RESEAU OPTIQUE, LASERS ULTRASTABLES, ATOME DE MERCURE. AbstractWe describe the development of an optical lattice clock using mercury atoms from the initial start until absolute frequency measurements which led to including the clock transition of 199 Hg into the list of recommended values of standard frequencies of the CIPM.

show abstract

Precise Frequenccy Measurements of CO2/OsO4 and HeNe/CH4-Stabilized Lasers

Cited by 64 publications

References 14 publications

Absolute Frequency Measurement of the2S−8S/DTransitions in Hydrogen and Deuterium: New Determination of the Rydberg Constant

Absolute Frequency Measurement of the2S−8S/DTransitions in Hydrogen and Deuterium: New Determination of the Rydberg Constant

Nd: YAG laser frequency stabilized for space applications

Horloge à réseau optique à atomes de mercure

Contact Info

Product

Resources

About