时间频率公报最新文献_第2页

Ytterbium optical lattice clock at INRIM INRIM的镱光学晶格钟

时间频率公报 Pub Date : 2015-04-12 DOI: 10.1109/FCS.2015.7138846

M. Pizzocaro, F. Bregolin, G. Milani, B. Rauf, P. Thoumany, G. Costanzo, F. Levi, D. Calonico

{"title":"Ytterbium optical lattice clock at INRIM","authors":"M. Pizzocaro, F. Bregolin, G. Milani, B. Rauf, P. Thoumany, G. Costanzo, F. Levi, D. Calonico","doi":"10.1109/FCS.2015.7138846","DOIUrl":"https://doi.org/10.1109/FCS.2015.7138846","url":null,"abstract":"We present an optical lattice clock based on ytterbium 171Yb atoms developed in the laboratories of INRIM. In the experiment, we cool and trap ytterbium atoms in a two stage magneto-optical trap (MOT) (at 399nm and 556nm for the first and second stage, respectively). Atoms are then transferred in a horizontal, one-dimensional optical lattice at the magic wavelength (759 nm). Here the clock transition at 578nm is probed by a laser stabilized on an ultra-stable cavity. We describe the generation of all the laser sources, the physic package and the operation of the clock. Lasers at 399 nm, 556nm and 578nm are obtained, with different techniques, using non-linear crystals starting from infrared sources. The clock laser is stabilized using a high finesse notched ULE cavity. The lattice is made with a titanium-sapphire laser. The aluminum vacuum chamber is designed for wide optical access and its temperature is measured by 8 thermistors for blackbody shift evaluation. Our system allows for fast loading of the lattice with 1 × 104 atoms trapped in the lattice in 250 ms. We obtained preliminary spectroscopy results and we locked the clock laser to the atomic line. Future perspectives are discussed.","PeriodicalId":57667,"journal":{"name":"时间频率公报","volume":"11 17 1","pages":"300-303"},"PeriodicalIF":0.0,"publicationDate":"2015-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78404142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

The effect of bend on the Ramsey cavity 弯曲对拉姆齐腔的影响

时间频率公报 Pub Date : 2015-04-12 DOI: 10.1109/FCS.2015.7138890

F. Sun, Xian-he Huang

引用次数: 0

External cavity diode laser with long-term frequency stabilization based on mode boundary detection 基于模式边界检测的长期稳频外腔二极管激光器

时间频率公报 Pub Date : 2015-04-12 DOI: 10.1109/FCS.2015.7138918

Z. Xu, Kaikai Huang, Xuanhui Lu

引用次数: 1

A status report on time scale generation in PTB PTB中时间标度生成的现状报告

时间频率公报 Pub Date : 2015-04-12 DOI: 10.1109/FCS.2015.7138862

A. Bauch, E. Staliuniene, G. Gomah

引用次数: 1

Stability analysis of the French timescale UTC(OP) 法国时标UTC(OP)的稳定性分析

时间频率公报 Pub Date : 2015-04-12 DOI: 10.1109/FCS.2015.7138836

M. Abgrall, S. Bize, B. Chupin, J. Guéna, P. Laurent, P. Rosenbusch, P. Uhrich, G. Rovera

引用次数: 0

Two independent strontium optical lattice clocks for practical realization of the meter and secondary representation of the second 两个独立的锶光学晶格钟，用于实际实现米和秒的二次表示

时间频率公报 Pub Date : 2015-04-12 DOI: 10.1109/FCS.2015.7138847

M. Zawada, M. Bober, P. Morzyński, A. Cygan, D. Lisak, P. Masłowski, M. Prymaczek, P. Wcisło, P. Ablewski, M. Piwiński, S. Wójtewicz, K. Bielska, D. Bartoszek-Bober, R. Ciuryło, J. Zachorowski, M. Piotrowski, W. Gawlik, F. Ozimek, C. Radzewicz

引用次数: 2

Front-end receiver: Recent and emerging trend 前端接收器:最近出现的趋势

时间频率公报 Pub Date : 2015-04-12 DOI: 10.1109/FCS.2015.7138852

U. Rohde, A. Poddar, E. Rubiola, M. Silaghi

引用次数: 1

Nonlinear acceleration sensitivity of quartz resonators 石英谐振器的非线性加速度灵敏度

时间频率公报 Pub Date : 2015-04-12 DOI: 10.1109/FCS.2015.7138783

Jianfeng Chen, Y. Yong, R. Kubena, D. Kirby, D. Chang

{"title":"Nonlinear acceleration sensitivity of quartz resonators","authors":"Jianfeng Chen, Y. Yong, R. Kubena, D. Kirby, D. Chang","doi":"10.1109/FCS.2015.7138783","DOIUrl":"https://doi.org/10.1109/FCS.2015.7138783","url":null,"abstract":"The nonlinear effects of initial stress/strain of the quartz plate resonator on its acceleration sensitivity was studied. Finite element models were developed using a theory of small deformations superposed on finite initial deformations in a Lagrangian formulation. AT- and SC-cut quartz circular plate resonators were studied. The plates were respectively subjected to diametrical compression force and bending force. The initial strains due to the application of diametrical force represented initial strains due to in-plane acceleration, while the initial strains due to bending force represented initial strains due to out-of-plane acceleration. Our model results using nonlinear initial strains showed good agreement with measured data by Ballato, Mingins, and Fletcher and Douglas. The model results using linear initial strains compared well only with the measured data for plates subjected to diametrical force but not for plates subjected to bending forces. Hence our model results showed that for accurate prediction of out-of-plane acceleration sensitivity the nonlinear initial strains must be used. The linear initial stress/strain cannot fully capture rotation and bending effects. The acceleration sensitivity model using linear initial strains could only be employed for in-plane acceleration, or for very low g out-of-plane acceleration. The SC-cut crystals showed better linearity of frequency change with respect to applied bending forces than the AT-cut crystals. The principle of superposition for out-of-plane acceleration sensitivity in AT-cut crystals is in general not valid, especially in cases of high g accelerations.","PeriodicalId":57667,"journal":{"name":"时间频率公报","volume":"69 1","pages":"11-16"},"PeriodicalIF":0.0,"publicationDate":"2015-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79990905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

An atomic frequency micrometer based on the coherent population beating phenomenon 基于相干居群跳动现象的原子频率千分尺

时间频率公报 Pub Date : 2015-04-12 DOI: 10.1109/FCS.2015.7138883

Wang Zhong, Zhao Jianye, Zhao Xiaona, Liu Li, Zhuang Yuxin, Liao Dawei

引用次数: 4

Enhancement of effective electromechanical coupling factor by mass loading in layered SAW device structures 层状SAW器件结构中质量加载增强有效机电耦合系数

时间频率公报 Pub Date : 2015-04-12 DOI: 10.1109/FCS.2015.7138870

Gongbin Tang, Tao Han, Akihiko Teshigahara, T. Iwaki, K. Hashimoto

引用次数: 14