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2014 European Frequency and Time Forum (EFTF)最新文献

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Testbed for measuring of the effect of fiber acoustic-band phase noise on the T&F transfer stability 光纤声带相位噪声对T&F传输稳定性影响的测试平台
2014 European Frequency and Time Forum (EFTF) Pub Date : 2014-06-23 DOI: 10.1109/EFTF.2014.7331497
M. Lipinski, P. Krehlik, L. Sliwczynski, L. Buczek, W. Wszolek
{"title":"Testbed for measuring of the effect of fiber acoustic-band phase noise on the T&F transfer stability","authors":"M. Lipinski, P. Krehlik, L. Sliwczynski, L. Buczek, W. Wszolek","doi":"10.1109/EFTF.2014.7331497","DOIUrl":"https://doi.org/10.1109/EFTF.2014.7331497","url":null,"abstract":"The phenomenon of some special low frequency acoustic-band optical phase-noise may occur in the field depleted fibers. Because this kind of noise may disturb the precise Time&Frequency Fiber-Optic transfer, an arrangement to do some immunity tests of the solutions applied seems to be needed. In the paper first the idea of testbed in which the mechanically induced acoustic-band optical phase noise-substitute is described and its own features and measured parameters are presented. The noise-substitute harmonic signal is generated by use of the specialized Bruel&Kjaer vibration exciter longitudionally stretching the fiber. In the second part of paper the first experimental research results on the T&F transfer OSTT-2 system's resistance to the acoustic-band noise are presented.","PeriodicalId":129873,"journal":{"name":"2014 European Frequency and Time Forum (EFTF)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122169267","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: 0
Calibration of the TWSTFT link between OCA and OP using a GPS link calibration 使用GPS链路校准OCA和OP之间的TWSTFT链路
2014 European Frequency and Time Forum (EFTF) Pub Date : 2014-06-23 DOI: 10.1109/EFTF.2014.7331434
M. Laas-Bourez, C. Courde, E. Samain, J. Oneto, D. Rovera, J. Achkar, P. Uhrich, P. Guillemot
{"title":"Calibration of the TWSTFT link between OCA and OP using a GPS link calibration","authors":"M. Laas-Bourez, C. Courde, E. Samain, J. Oneto, D. Rovera, J. Achkar, P. Uhrich, P. Guillemot","doi":"10.1109/EFTF.2014.7331434","DOIUrl":"https://doi.org/10.1109/EFTF.2014.7331434","url":null,"abstract":"Three independent time transfer techniques are in operation in Observatoire de la Côte d'Azur (OCA): GPS, TWSTFT and T2L2. In Autumn 2013, a GPS receiver relative calibration campaign has been carried out. The result of this campaign, primarily intended to compare GPS with T2L2, have allowed the calibration of the TWSTFT link between OCA and OP. We computed for OCA the value of CALR = 7111.9 ns, with an uncertainty u = 2.8 ns at k = 2. From this calibration we caracterise the others links with the triangle closure technique.","PeriodicalId":129873,"journal":{"name":"2014 European Frequency and Time Forum (EFTF)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127607894","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: 0
Demonstration of optical pumping using a micro-fabricated Rb dielectric barrier discharge (DBD) lamp 微制造Rb介电阻挡放电(DBD)灯的光泵浦演示
2014 European Frequency and Time Forum (EFTF) Pub Date : 2014-06-23 DOI: 10.1109/EFTF.2014.7331460
Songbai Kang, V. Venkatraman, C. Affolderbach, H. Shea, G. Mileti
{"title":"Demonstration of optical pumping using a micro-fabricated Rb dielectric barrier discharge (DBD) lamp","authors":"Songbai Kang, V. Venkatraman, C. Affolderbach, H. Shea, G. Mileti","doi":"10.1109/EFTF.2014.7331460","DOIUrl":"https://doi.org/10.1109/EFTF.2014.7331460","url":null,"abstract":"Recently, a low-power, mm-scale (~0.3 cm3) Rb dielectric barrier discharge (DBD) lamp was demonstrated, in view of the development of a chip-scale atomic clock based on the traditional double-resonance (DR) interrogation scheme. Here, we report on the demonstration of optical pumping in a micro-fabricated Rb vapor cell (~0.3 cm3), using such a DBD Rb lamp as a pump light source. As a first step, we demonstrate Zeeman optical pumping in the Mz magnetometer configuration and observe the DR error signals. Comparative studies between DBD lamp and glass-blown (GB) lamp on the intensity noise and the DR error signals were performed. These results show that the performances of DBD lamp are comparable to those of a conventional glass-blown lamp, which indicates a high potential of the DBD lamp for the development of miniature atomic clocks, magnetometers and quantum sensors.","PeriodicalId":129873,"journal":{"name":"2014 European Frequency and Time Forum (EFTF)","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129336532","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: 0
Rb-based stabilized laser system as frequency reference for CO2 monitoring 基于铷基稳定激光系统的CO2监测频率参考
2014 European Frequency and Time Forum (EFTF) Pub Date : 2014-06-23 DOI: 10.1109/EFTF.2014.7331464
R. Matthey, F. Gruet, S. Schilt, G. Mileti
{"title":"Rb-based stabilized laser system as frequency reference for CO2 monitoring","authors":"R. Matthey, F. Gruet, S. Schilt, G. Mileti","doi":"10.1109/EFTF.2014.7331464","DOIUrl":"https://doi.org/10.1109/EFTF.2014.7331464","url":null,"abstract":"We present our ongoing development of a compact fiber-connectorized rubidium-based laser system as frequency reference for CO2 monitoring at 1572 nm. Part of the radiation of a continuous-wave master DFB laser emitting at 1560 nm is frequency-doubled to reach a rubidium absorption line at 780 nm for frequency locking. An optical frequency comb, generated from the other part of the master laser radiation injected into a resonant cavity that contains an electro-optical modulator, fills the 12-nm gap between the CO2 line and the master laser optical frequency. The frequency stability of the master laser and of one line of the frequency comb at 1557 nm was measured by heterodyning with a fully-stabilized Er-fiber optical frequency comb referenced to an H-maser. A fractional Allan deviation below or equal to 1×10-10 (20 kHz) was measured between 1 and 10 second integration time, improving down to below 1×10-11 (2 kHz) between 1'000 and 200'000 seconds.","PeriodicalId":129873,"journal":{"name":"2014 European Frequency and Time Forum (EFTF)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130575034","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: 0
Extending the delay compensation range of the fiber optic time and frequency transfer system 扩大了光纤时频传输系统的延时补偿范围
2014 European Frequency and Time Forum (EFTF) Pub Date : 2014-06-23 DOI: 10.1109/EFTF.2014.7331506
P. Krehlik, L. Sliwczynski, M. Idzik
{"title":"Extending the delay compensation range of the fiber optic time and frequency transfer system","authors":"P. Krehlik, L. Sliwczynski, M. Idzik","doi":"10.1109/EFTF.2014.7331506","DOIUrl":"https://doi.org/10.1109/EFTF.2014.7331506","url":null,"abstract":"In this paper we presented three different methods of extending the delay compensation range of the fiber optic system with stabilization of propagation delay. In the original design the acceptable fiber delay fluctuations were limited to about 100 ns, and after proposed modifications this range was increased up to about 1200 ns, which is enough for maintenance-free operation of 1000 km-long links dedicated for time and frequency distribution.","PeriodicalId":129873,"journal":{"name":"2014 European Frequency and Time Forum (EFTF)","volume":"305 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134212496","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
Analytic estimate of thermal noise in sphere optical reference cavities 球面光学参考腔热噪声的解析估计
2014 European Frequency and Time Forum (EFTF) Pub Date : 2014-06-23 DOI: 10.1109/EFTF.2014.7331557
Guanjun Xu, Linbo Zhang, Jie Liu, Jing Gao, D. Jiao, Long Chen, Q. Zang, R. Dong, Tao Liu
{"title":"Analytic estimate of thermal noise in sphere optical reference cavities","authors":"Guanjun Xu, Linbo Zhang, Jie Liu, Jing Gao, D. Jiao, Long Chen, Q. Zang, R. Dong, Tao Liu","doi":"10.1109/EFTF.2014.7331557","DOIUrl":"https://doi.org/10.1109/EFTF.2014.7331557","url":null,"abstract":"Thermal noise in optical cavities sets a fundamental limit to the frequency instability of ultra-stable lasers. We estimate the contribution of the sphere spacer using the new Equation based on Levin's formulation of the fluctuation-dissipation-theorem (FDT) and elastic strain energy. Focusing on the sphere spacer geometry, the estimate and simulation of the thermal noise have been carried out. We find that thermal noise of the sphere spacer behaves different from cylindrical cavities. The estimate for the sphere spacer by the new Equation agrees better with simulation compared with previous equations.","PeriodicalId":129873,"journal":{"name":"2014 European Frequency and Time Forum (EFTF)","volume":"264 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134291896","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: 0
Modular time interval counter 模时间间隔计数器
2014 European Frequency and Time Forum (EFTF) Pub Date : 2014-06-23 DOI: 10.1109/EFTF.2014.7331544
R. Szplet, P. Kwiatkowski, K. Rozyc, M. Sawicki, Z. Jachna
{"title":"Modular time interval counter","authors":"R. Szplet, P. Kwiatkowski, K. Rozyc, M. Sawicki, Z. Jachna","doi":"10.1109/EFTF.2014.7331544","DOIUrl":"https://doi.org/10.1109/EFTF.2014.7331544","url":null,"abstract":"This paper presents the design, operation and test results of a modular multichannel time interval counter built with the use of programmable devices. Its resolution is below 45 ps and the measurement range reaches 1 s. The counter contains 6 independent measurement modules, each built with the use of precise time counter implemented in a single FPGA (Field Programmable Gate Array) device Spartan-3 (Xilinx). To obtain both high precision and wide measurement range the counting of periods of a reference clock is combined with the two-stage interpolation within a single period of clock signal [1]. The interpolation involves a four-phase clock in the first interpolation stage and a time coding line in the second interpolation stage [2]. Modular architecture of the time counter increases its versatility and reliability. The measurement precision of device model is better than 150 ps in a full measurement range. As the acid test the time differences between signals of 1 PPS (Pulse Per Second) from tested clock sources and the reference 1PPS signal was also performed.","PeriodicalId":129873,"journal":{"name":"2014 European Frequency and Time Forum (EFTF)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129846808","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: 3
Experimental treatments for the investigation of nuclear optical transition in Thorium-229 钍-229核光学跃迁研究的实验处理
2014 European Frequency and Time Forum (EFTF) Pub Date : 2014-06-23 DOI: 10.1109/EFTF.2014.7331552
V. I. Troyan, P. Borisyuk, Y. Lebedinskii, A. Krasavin, A. A. Sysoyev, S. Poteshin, V. Yakovlev
{"title":"Experimental treatments for the investigation of nuclear optical transition in Thorium-229","authors":"V. I. Troyan, P. Borisyuk, Y. Lebedinskii, A. Krasavin, A. A. Sysoyev, S. Poteshin, V. Yakovlev","doi":"10.1109/EFTF.2014.7331552","DOIUrl":"https://doi.org/10.1109/EFTF.2014.7331552","url":null,"abstract":"An original preparation technique of the thorium films by electrochemical deposition from thorium nitrate solution on different substrate is reported. It was found that electrochemical deposition of thorium on the metal surface provides the formation of adherent continuous films, while the deposition on the semiconductor substrates leads to the formation of thorium island films. The origin of the observed thorium films formation and the results on the investigation of thorium films on Si(111) and polycrystalline Cu surfaces by XPS and LEIS are discussed.","PeriodicalId":129873,"journal":{"name":"2014 European Frequency and Time Forum (EFTF)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131012068","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: 3
SAW resonator defects identification technique SAW谐振器缺陷识别技术
2014 European Frequency and Time Forum (EFTF) Pub Date : 2014-06-23 DOI: 10.1109/EFTF.2014.7331450
A. Shimko, K. Stroganov, V. Kalinin
{"title":"SAW resonator defects identification technique","authors":"A. Shimko, K. Stroganov, V. Kalinin","doi":"10.1109/EFTF.2014.7331450","DOIUrl":"https://doi.org/10.1109/EFTF.2014.7331450","url":null,"abstract":"SAW resonators are widely used as sensitive elements of sensors where the resonance frequency is an informative parameter. In case of defects in resonator structure the parasitic modes are excites which impact on the measurement accuracy. In this paper a resonator defects identification technique based on using a vector network analyzer is proposed.","PeriodicalId":129873,"journal":{"name":"2014 European Frequency and Time Forum (EFTF)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134647762","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: 0
Toward a highly stable master laser for the interrogation of SYRTE's Sr and Hg optical lattice clocks 研制高稳定主激光器用于syte的Sr和Hg光学晶格钟的探测
2014 European Frequency and Time Forum (EFTF) Pub Date : 2014-06-23 DOI: 10.1109/EFTF.2014.7331558
O. Gobron, K. Predehl, D. Nicolodi, R. Le Targat, Y. Le Coq, A. Ferrier, P. Goldner
{"title":"Toward a highly stable master laser for the interrogation of SYRTE's Sr and Hg optical lattice clocks","authors":"O. Gobron, K. Predehl, D. Nicolodi, R. Le Targat, Y. Le Coq, A. Ferrier, P. Goldner","doi":"10.1109/EFTF.2014.7331558","DOIUrl":"https://doi.org/10.1109/EFTF.2014.7331558","url":null,"abstract":"We report on the current developments at LNE-SYRTE to realize an ultra-stable laser based on spectral hole burning spectroscopy of rare-earth doped crystals at cryogenic temperature. Our goal is to realize a cw laser with a stability below 10-16, suitable for quantum projection noise limited interrogation of optical lattice clocks after transfer to optical clocks wavelength via an optical frequency comb. Our laser system currently comprises two 1160nm lasers, one referenced to a pre-stabilization cavity and the second offset phase-locked to the first. After frequency doubling, we obtain spectral hole burning patterns in Eu3+:Y2SiO5 near 4K.","PeriodicalId":129873,"journal":{"name":"2014 European Frequency and Time Forum (EFTF)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114140881","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: 0
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