Pub Date : 2012-04-23DOI: 10.1109/EFTF.2012.6502339
M. Mrad, Y. Kersalé, P. Bourgeois, V. Giordano, S. Grop, K. Benmessai, M. Tobar
This paper reports on the comparison of a Cryocooled Sapphire Oscillator with our Cryocooled MASER Oscillator thanks to a home-made synthesis chain. The MASER oscillator demonstrates for the first time a fractional frequency deviation below 6 · 10−15 over 4 s sampling time which is comparable to the conventional CSRO but achieved in a free running environment.
{"title":"Recent progress on cryogenic MASER oscillator","authors":"M. Mrad, Y. Kersalé, P. Bourgeois, V. Giordano, S. Grop, K. Benmessai, M. Tobar","doi":"10.1109/EFTF.2012.6502339","DOIUrl":"https://doi.org/10.1109/EFTF.2012.6502339","url":null,"abstract":"This paper reports on the comparison of a Cryocooled Sapphire Oscillator with our Cryocooled MASER Oscillator thanks to a home-made synthesis chain. The MASER oscillator demonstrates for the first time a fractional frequency deviation below 6 · 10−15 over 4 s sampling time which is comparable to the conventional CSRO but achieved in a free running environment.","PeriodicalId":6409,"journal":{"name":"2012 European Frequency and Time Forum","volume":"1 1","pages":"83-86"},"PeriodicalIF":0.0,"publicationDate":"2012-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81908972","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}
Pub Date : 2012-04-23DOI: 10.1109/EFTF.2012.6502411
M. Bober, J. Zachorowski, W. Gawlik, P. Morzyński, M. Zawada, D. Lisak, A. Cygan, K. Bielska, M. Piwiński, R. Trawiński, R. Ciuryło, F. Ozimek, C. Radzewicz
We report on the status of the work towards cold strontium clock in the Polish National Laboratory of AMO Physics in Torun. The system consists of: (1) a Zeeman slower and magneto-optical traps (at 461 nm and 689 nm), (2) a frequency comb, and (3) a narrow-band laser coupled to an ultra-stable optical cavity. So far, all parts of the experiment are working and the whole system is tested at the 1S0-3P1, 689 nm optical transition in 88Sr atoms with 7 kHz linewidth.
{"title":"Towards Polish Optical Clock with Cold Strontium Atoms, present status and performance","authors":"M. Bober, J. Zachorowski, W. Gawlik, P. Morzyński, M. Zawada, D. Lisak, A. Cygan, K. Bielska, M. Piwiński, R. Trawiński, R. Ciuryło, F. Ozimek, C. Radzewicz","doi":"10.1109/EFTF.2012.6502411","DOIUrl":"https://doi.org/10.1109/EFTF.2012.6502411","url":null,"abstract":"We report on the status of the work towards cold strontium clock in the Polish National Laboratory of AMO Physics in Torun. The system consists of: (1) a Zeeman slower and magneto-optical traps (at 461 nm and 689 nm), (2) a frequency comb, and (3) a narrow-band laser coupled to an ultra-stable optical cavity. So far, all parts of the experiment are working and the whole system is tested at the <sup>1</sup>S<inf>0</inf>-<sup>3</sup>P<inf>1</inf>, 689 nm optical transition in <sup>88</sup>Sr atoms with 7 kHz linewidth.","PeriodicalId":6409,"journal":{"name":"2012 European Frequency and Time Forum","volume":"36 1","pages":"400-403"},"PeriodicalIF":0.0,"publicationDate":"2012-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84420304","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}
Pub Date : 2012-04-23DOI: 10.1109/EFTF.2012.6502408
C. Rieck, K. Jaldehag
In this paper we present a primary NTP server design that provides a full line rate packet stream handling with about 50 ns internal timing accuracy independent from packet throughput. The provided solution is replay proof and is intended for NTP services close to backbone of the Internet.
{"title":"A hardware accelerated 10GbE primary NTP-server","authors":"C. Rieck, K. Jaldehag","doi":"10.1109/EFTF.2012.6502408","DOIUrl":"https://doi.org/10.1109/EFTF.2012.6502408","url":null,"abstract":"In this paper we present a primary NTP server design that provides a full line rate packet stream handling with about 50 ns internal timing accuracy independent from packet throughput. The provided solution is replay proof and is intended for NTP services close to backbone of the Internet.","PeriodicalId":6409,"journal":{"name":"2012 European Frequency and Time Forum","volume":"27 1","pages":"387-391"},"PeriodicalIF":0.0,"publicationDate":"2012-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80085201","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}
Pub Date : 2012-04-23DOI: 10.1109/EFTF.2012.6502370
O. Traon, D. Janiaud, J. Guerard, R. Lévy, S. Masson, O. Ducloux, M. Pernice, R. Taibi
Quartz crystal has been an essential material for time and frequency and radio-frequency applications during the 20th century. Quartz is always an unmatched material at the beginning of the 21st century, and hold 80 % of oscillators & RF market which represent today 17 billions market with a 10 % growth per year. This paper describes other more confidential applications - the vibrating inertial MEMS - where the quartz crystal plays also a major role. Clearly, quartz crystal has still a future in these high added value applications, and for a long time.
{"title":"The fairy world of quartz vibrating MEMS","authors":"O. Traon, D. Janiaud, J. Guerard, R. Lévy, S. Masson, O. Ducloux, M. Pernice, R. Taibi","doi":"10.1109/EFTF.2012.6502370","DOIUrl":"https://doi.org/10.1109/EFTF.2012.6502370","url":null,"abstract":"Quartz crystal has been an essential material for time and frequency and radio-frequency applications during the 20th century. Quartz is always an unmatched material at the beginning of the 21st century, and hold 80 % of oscillators & RF market which represent today 17 billions market with a 10 % growth per year. This paper describes other more confidential applications - the vibrating inertial MEMS - where the quartz crystal plays also a major role. Clearly, quartz crystal has still a future in these high added value applications, and for a long time.","PeriodicalId":6409,"journal":{"name":"2012 European Frequency and Time Forum","volume":"127 1","pages":"214-220"},"PeriodicalIF":0.0,"publicationDate":"2012-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73383807","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}
Pub Date : 2012-04-23DOI: 10.1109/EFTF.2012.6502320
M. Tobar, D. Creedon, M. Goryachev, K. Benmessai, J. Le Floch, E. Ivanov, W. Bowen, S. Galliou, R. Bourquin
Some future applications for high-Q resonant cavities at cryogenic temperatures lie in the discipline of hybrid quantum systems. In this paper we review our recent work in this discipline, which investigates spins in sapphire resonators and the unique property of quartz at low temperatures.
{"title":"Some future applications of cryogenic high-Q resonant cavities","authors":"M. Tobar, D. Creedon, M. Goryachev, K. Benmessai, J. Le Floch, E. Ivanov, W. Bowen, S. Galliou, R. Bourquin","doi":"10.1109/EFTF.2012.6502320","DOIUrl":"https://doi.org/10.1109/EFTF.2012.6502320","url":null,"abstract":"Some future applications for high-Q resonant cavities at cryogenic temperatures lie in the discipline of hybrid quantum systems. In this paper we review our recent work in this discipline, which investigates spins in sapphire resonators and the unique property of quartz at low temperatures.","PeriodicalId":6409,"journal":{"name":"2012 European Frequency and Time Forum","volume":"29 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2012-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74787262","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}
Pub Date : 2012-04-23DOI: 10.1109/EFTF.2012.6502353
I. Blinov, Y. Domnin, S. Donchenko, N. Koshelyaevsky, V. Kostromin
The paper presents results of development programs just finished in VNIIFTRI. Some of them, such as CS fountain standard, ensemble of new H-masers and TWSTFT station, directly improved the State Time and Frequency Standard of Russia, the influence of other are expected in closest future.
{"title":"Progress at the State Time and Frequency Standard of Russia","authors":"I. Blinov, Y. Domnin, S. Donchenko, N. Koshelyaevsky, V. Kostromin","doi":"10.1109/EFTF.2012.6502353","DOIUrl":"https://doi.org/10.1109/EFTF.2012.6502353","url":null,"abstract":"The paper presents results of development programs just finished in VNIIFTRI. Some of them, such as CS fountain standard, ensemble of new H-masers and TWSTFT station, directly improved the State Time and Frequency Standard of Russia, the influence of other are expected in closest future.","PeriodicalId":6409,"journal":{"name":"2012 European Frequency and Time Forum","volume":"1 1","pages":"144-147"},"PeriodicalIF":0.0,"publicationDate":"2012-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75408712","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}
Pub Date : 2012-04-23DOI: 10.1109/EFTF.2012.6502341
J. Danet, O. Kozlova, S. Guérandel, E. de Clercq
Recent progress are reported on a compact cesium cell atomic frequency standard based on pulsed Coherent Population Trapping interaction in the Dicke regime. Main short term and long term limiting parameters have been identified. Last improvements have permitted to reach a stability of 7×10−13 at 1sec and 2×10−14 at 2000 s. The noise characterization process is presented in this article.
{"title":"Recent progress on the pulsed CPT Cs clock at SYRTE","authors":"J. Danet, O. Kozlova, S. Guérandel, E. de Clercq","doi":"10.1109/EFTF.2012.6502341","DOIUrl":"https://doi.org/10.1109/EFTF.2012.6502341","url":null,"abstract":"Recent progress are reported on a compact cesium cell atomic frequency standard based on pulsed Coherent Population Trapping interaction in the Dicke regime. Main short term and long term limiting parameters have been identified. Last improvements have permitted to reach a stability of 7×10<sup>−13</sup> at 1sec and 2×10<sup>−14</sup> at 2000 s. The noise characterization process is presented in this article.","PeriodicalId":6409,"journal":{"name":"2012 European Frequency and Time Forum","volume":"33 1","pages":"91-95"},"PeriodicalIF":0.0,"publicationDate":"2012-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75509866","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}
Pub Date : 2012-04-23DOI: 10.1109/EFTF.2012.6502415
K. Doringshoff, M. Reggentin, E. Kovalchuk, M. Nagel, A. Keetman, T. Schuldt, C. Braxmaier, A. Peters
We present different setups for frequency stabilization of Nd:YAG lasers to absorption lines in molecular iodine featuring frequency stabilities of 3 · 10−15 at averaging times between 100 s and 1000 s. First results of a semi-monolithic setup, developed aiming at a space qualifiable iodine frequency reference, are shown.
{"title":"Iodine based optical frequency reference with 10−15 stability","authors":"K. Doringshoff, M. Reggentin, E. Kovalchuk, M. Nagel, A. Keetman, T. Schuldt, C. Braxmaier, A. Peters","doi":"10.1109/EFTF.2012.6502415","DOIUrl":"https://doi.org/10.1109/EFTF.2012.6502415","url":null,"abstract":"We present different setups for frequency stabilization of Nd:YAG lasers to absorption lines in molecular iodine featuring frequency stabilities of 3 · 10−15 at averaging times between 100 s and 1000 s. First results of a semi-monolithic setup, developed aiming at a space qualifiable iodine frequency reference, are shown.","PeriodicalId":6409,"journal":{"name":"2012 European Frequency and Time Forum","volume":"75 1","pages":"419-421"},"PeriodicalIF":0.0,"publicationDate":"2012-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72682308","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}
Pub Date : 2012-04-23DOI: 10.1109/EFTF.2012.6502390
J. Haesler, J. Bennes, T. Overstolz, J. Pierer, R. J. James, D. Ruffieux, S. Lecomte
The first prototype of an eXtra Small Atomic Resonator (XSAR) was presented by CSEM at the 2009 EFTF conference. This paper describes the progress realized until 2011 towards the realization of a low-power miniature atomic clock. We here present the third generation of the prototype, merging for the first time the physics and electronics packages on a single printed circuit board.
{"title":"Swiss miniature atomic clock: First prototype and preliminary results","authors":"J. Haesler, J. Bennes, T. Overstolz, J. Pierer, R. J. James, D. Ruffieux, S. Lecomte","doi":"10.1109/EFTF.2012.6502390","DOIUrl":"https://doi.org/10.1109/EFTF.2012.6502390","url":null,"abstract":"The first prototype of an eXtra Small Atomic Resonator (XSAR) was presented by CSEM at the 2009 EFTF conference. This paper describes the progress realized until 2011 towards the realization of a low-power miniature atomic clock. We here present the third generation of the prototype, merging for the first time the physics and electronics packages on a single printed circuit board.","PeriodicalId":6409,"journal":{"name":"2012 European Frequency and Time Forum","volume":"7 1","pages":"312-315"},"PeriodicalIF":0.0,"publicationDate":"2012-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73469660","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}
Pub Date : 2012-04-23DOI: 10.1109/EFTF.2012.6502439
I. Hill, Y. Ovchinnikov, E. Bridge, E. A. Curtis, S. Donnellan, P. Gill
We report the successful demonstration and characterisation of a Zeeman slower based on an array of permanent magnets, implemented for atomic Sr on the 1S0 → 1P1 transition at 461 nm. Measurements of longitudinal velocity distributions and MOT loading characteristics are presented. In particular, we highlight a simple transverse-field slower, which is both compact and highly tunable, light weight (≤ 2 kg), and with no power load, as a favourable option for space-borne operation. For optimum parameters of this slower we achieve a slow flux of ∼ 3.5 × 109 atom/s at ∼ 30 m/s for 88Sr and load ∼ 2.5 × 107 atoms into a magneto-optical-trap (MOT) operating on the same 1S0 → 1P1 transition, which scales approximately with the relative isotopic natural abundances of Sr. With the addition of repumpers at 707 nm and 679 nm, we achieve a factor of ∼ 17 enhancement to MOT number with loading time ∼ 0.5 s.
我们报告了基于永磁体阵列的塞曼减速机的成功演示和表征，该减速机实现了原子Sr在461 nm处的1S0→1P1跃迁。给出了纵向速度分布和MOT加载特性的测量结果。特别地，我们强调了一个简单的横向场减速机，它既紧凑又高度可调，重量轻(≤2公斤)，没有电力负载，作为空间运载操作的有利选择。为最优参数的慢我们实现一个通量缓慢∼3.5×109原子在∼30 m / s / s 88 sr和负载∼2.5×107个原子到magneto-optical-trap(年检)操作在同一s0→1 p1过渡,与相对同位素的自然丰度尺度约老外加repumpers在707 nm和679 nm,我们实现一个因素与加载时间∼∼17增强年检数量0.5 s。
{"title":"A simple, configurable, permanent magnet Zeeman Slower for Sr","authors":"I. Hill, Y. Ovchinnikov, E. Bridge, E. A. Curtis, S. Donnellan, P. Gill","doi":"10.1109/EFTF.2012.6502439","DOIUrl":"https://doi.org/10.1109/EFTF.2012.6502439","url":null,"abstract":"We report the successful demonstration and characterisation of a Zeeman slower based on an array of permanent magnets, implemented for atomic Sr on the <sup>1</sup>S<inf>0</inf> → <sup>1</sup>P<inf>1</inf> transition at 461 nm. Measurements of longitudinal velocity distributions and MOT loading characteristics are presented. In particular, we highlight a simple transverse-field slower, which is both compact and highly tunable, light weight (≤ 2 kg), and with no power load, as a favourable option for space-borne operation. For optimum parameters of this slower we achieve a slow flux of ∼ 3.5 × 10<sup>9</sup> atom/s at ∼ 30 m/s for <sup>88</sup>Sr and load ∼ 2.5 × 10<sup>7</sup> atoms into a magneto-optical-trap (MOT) operating on the same <sup>1</sup>S<inf>0</inf> → <sup>1</sup>P<inf>1</inf> transition, which scales approximately with the relative isotopic natural abundances of Sr. With the addition of repumpers at 707 nm and 679 nm, we achieve a factor of ∼ 17 enhancement to MOT number with loading time ∼ 0.5 s.","PeriodicalId":6409,"journal":{"name":"2012 European Frequency and Time Forum","volume":"53 1","pages":"545-549"},"PeriodicalIF":0.0,"publicationDate":"2012-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87396432","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}
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