Pub Date : 2015-04-12DOI: 10.1109/FCS.2015.7138828
Guillaume Gourlat, M. Sansa, G. Jourdan, P. Villard, G. Sicard, S. Hentz
We report the first experimental demonstration of a heterodyne self-oscillator operating alternatively on the first and second flexural mode of a silicon NEMS resonator. This architecture features a downmixing scheme where the NEMS motion-induced piezoresitive signal at 25 MHz and 70 Mhz is shifted down to few tens of kHz thus reducing the bandwidth constraint on the electronics. In closed loop operation, the oscillator presents excellent frequency stability, identical to the one obtained in PLL operation. While monitoring successively the two modes of the oscillator, mass addition on the NEMS was simulated by electrostatically-induced frequency shifts. This self-oscillator scheme represents a compact and power saving architecture compatible with the readout of dense sensor arrays required in applications such as mass sensing.
{"title":"Dual-mode NEMS self-oscillator for mass sensing","authors":"Guillaume Gourlat, M. Sansa, G. Jourdan, P. Villard, G. Sicard, S. Hentz","doi":"10.1109/FCS.2015.7138828","DOIUrl":"https://doi.org/10.1109/FCS.2015.7138828","url":null,"abstract":"We report the first experimental demonstration of a heterodyne self-oscillator operating alternatively on the first and second flexural mode of a silicon NEMS resonator. This architecture features a downmixing scheme where the NEMS motion-induced piezoresitive signal at 25 MHz and 70 Mhz is shifted down to few tens of kHz thus reducing the bandwidth constraint on the electronics. In closed loop operation, the oscillator presents excellent frequency stability, identical to the one obtained in PLL operation. While monitoring successively the two modes of the oscillator, mass addition on the NEMS was simulated by electrostatically-induced frequency shifts. This self-oscillator scheme represents a compact and power saving architecture compatible with the readout of dense sensor arrays required in applications such as mass sensing.","PeriodicalId":57667,"journal":{"name":"时间频率公报","volume":"21 1","pages":"222-225"},"PeriodicalIF":0.0,"publicationDate":"2015-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84469366","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 : 2015-04-12DOI: 10.1109/FCS.2015.7138826
Baron Thomas, Petrini Valerie, M. Gilles, C. Guillaume, Clairet Alexandre, Dulmet Bernard, Lesage Jean-Marc, Laroche Thierry, Ballandras Sylvain
Vibration sensitivity is an important specification for oscillators dedicated to space or airborne systems. Vibration sensitivity can be due to the resonator, the oscillator loop or non-oscillator components like wire, for instance. Commonly, the main source of acceleration sensitivity is due to the resonator. Active compensation can be used to decrease this effect, but such systems are not easily miniaturized. This paper presents computations of the stress sensitivity coefficients of frequency for the high-overtone bulk acoustic resonators and the design of a simple packaging to minimize vibration sensitivity. The final goal is to control vibration sensitivity of the high-overtone bulk acoustic resonators with dedicated packaging. The computed results are compared to experimental ones. The agreement between theoretical and experimental results is about 50%.
{"title":"Stress sensitivity coefficients of HBAR","authors":"Baron Thomas, Petrini Valerie, M. Gilles, C. Guillaume, Clairet Alexandre, Dulmet Bernard, Lesage Jean-Marc, Laroche Thierry, Ballandras Sylvain","doi":"10.1109/FCS.2015.7138826","DOIUrl":"https://doi.org/10.1109/FCS.2015.7138826","url":null,"abstract":"Vibration sensitivity is an important specification for oscillators dedicated to space or airborne systems. Vibration sensitivity can be due to the resonator, the oscillator loop or non-oscillator components like wire, for instance. Commonly, the main source of acceleration sensitivity is due to the resonator. Active compensation can be used to decrease this effect, but such systems are not easily miniaturized. This paper presents computations of the stress sensitivity coefficients of frequency for the high-overtone bulk acoustic resonators and the design of a simple packaging to minimize vibration sensitivity. The final goal is to control vibration sensitivity of the high-overtone bulk acoustic resonators with dedicated packaging. The computed results are compared to experimental ones. The agreement between theoretical and experimental results is about 50%.","PeriodicalId":57667,"journal":{"name":"时间频率公报","volume":"77 1","pages":"214-217"},"PeriodicalIF":0.0,"publicationDate":"2015-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87607322","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 : 2015-04-12DOI: 10.1109/FCS.2015.7138793
T. Gosavi, S. Bhave
This paper presents a model for locking Spin Torque Oscillator (STO) to an out-of-plane AC strain generated using a mechanical transducer like High-Overtone Bulk Acoustic Resonator (HBAR). We model the magnetization dynamics of the free layer magnet in the STO using the Landau-Lifshitz-Gilbert-Slonczewski (LLGS) equation modified to include magneto-elastic coupling term. Locking is clearly demonstrated from the simulated frequency spectrum of the acoustically-locked STO which has a narrower linewidth and higher signal power as compared to a free running STO. We have shown locking of different modes of the STO and compare the amplitude of out-of-plane AC strain needed to achieve lock. Acoustic locking illustrated here can be used for locking multiple STOs to a common strain transducer and is a potential platform for developing hybrid magneto-acoustic oscillator systems.
{"title":"Model for acoustic locking of Spin Torque Oscillator","authors":"T. Gosavi, S. Bhave","doi":"10.1109/FCS.2015.7138793","DOIUrl":"https://doi.org/10.1109/FCS.2015.7138793","url":null,"abstract":"This paper presents a model for locking Spin Torque Oscillator (STO) to an out-of-plane AC strain generated using a mechanical transducer like High-Overtone Bulk Acoustic Resonator (HBAR). We model the magnetization dynamics of the free layer magnet in the STO using the Landau-Lifshitz-Gilbert-Slonczewski (LLGS) equation modified to include magneto-elastic coupling term. Locking is clearly demonstrated from the simulated frequency spectrum of the acoustically-locked STO which has a narrower linewidth and higher signal power as compared to a free running STO. We have shown locking of different modes of the STO and compare the amplitude of out-of-plane AC strain needed to achieve lock. Acoustic locking illustrated here can be used for locking multiple STOs to a common strain transducer and is a potential platform for developing hybrid magneto-acoustic oscillator systems.","PeriodicalId":57667,"journal":{"name":"时间频率公报","volume":"59 1","pages":"68-71"},"PeriodicalIF":0.0,"publicationDate":"2015-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78870743","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 : 2015-04-12DOI: 10.1109/FCS.2015.7138798
J. W. Lou, F. Fatemi, G. Cranch
We have designed and characterized a Cesium vapor cell magnetometry system specifically aimed at meeting the challenges of remote interrogation. Standard single-mode telecom optical fibers are used for optical delivery and collection. The additional noise contribution due to optical polarization drift during propagation is mitigated by polarization and modal walk-off. We show that it is possible to obtain as low as 0.1 pT/Hz1/2 resolution at 1 Hz without temperature control over the ambient temperature range of -5 to 30 C.
{"title":"Remote atomic vapor magnetometer with Sub-pT resolution operating at ambient temperature","authors":"J. W. Lou, F. Fatemi, G. Cranch","doi":"10.1109/FCS.2015.7138798","DOIUrl":"https://doi.org/10.1109/FCS.2015.7138798","url":null,"abstract":"We have designed and characterized a Cesium vapor cell magnetometry system specifically aimed at meeting the challenges of remote interrogation. Standard single-mode telecom optical fibers are used for optical delivery and collection. The additional noise contribution due to optical polarization drift during propagation is mitigated by polarization and modal walk-off. We show that it is possible to obtain as low as 0.1 pT/Hz1/2 resolution at 1 Hz without temperature control over the ambient temperature range of -5 to 30 C.","PeriodicalId":57667,"journal":{"name":"时间频率公报","volume":"28 1","pages":"90-93"},"PeriodicalIF":0.0,"publicationDate":"2015-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83797752","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 : 2015-04-12DOI: 10.1109/FCS.2015.7138927
P. Uhrich, G. Rovera, B. Chupin, J. Galindo, H. Esteban, K. Jaldehag, C. Rieck, A. Bauch, T. Polewka, G. Cerretto, G. Fantino, R. Piriz
We report about a GPS receiver relative calibration campaign, which took place between five European National Metrology Institutes or Designated Institutes: LNE-SYRTE in Observatoire de Paris (Paris, France), where the reference receiver of the campaign was located, ROA (San Fernando, Spain), SP (Borås, Sweden), PTB (Braunschweig, Germany) and INRIM (Torino, Italy). We used as traveling equipment two main units, both connected to a single antenna, and we kept track of the offset between both traveling units in all the visited sites. An external validation of the resulting hardware delays is provided against the time scale differences derived from the UTC - UTC(k) data published by BIPM in its monthly Circular T. Thanks to a very good stability of the traveling equipment, we obtained expanded uncertainty estimates within 2.0 ns (k = 2) for the hardware delays.
{"title":"Use of two traveling GPS receivers for a relative calibration campaign among European laboratories","authors":"P. Uhrich, G. Rovera, B. Chupin, J. Galindo, H. Esteban, K. Jaldehag, C. Rieck, A. Bauch, T. Polewka, G. Cerretto, G. Fantino, R. Piriz","doi":"10.1109/FCS.2015.7138927","DOIUrl":"https://doi.org/10.1109/FCS.2015.7138927","url":null,"abstract":"We report about a GPS receiver relative calibration campaign, which took place between five European National Metrology Institutes or Designated Institutes: LNE-SYRTE in Observatoire de Paris (Paris, France), where the reference receiver of the campaign was located, ROA (San Fernando, Spain), SP (Borås, Sweden), PTB (Braunschweig, Germany) and INRIM (Torino, Italy). We used as traveling equipment two main units, both connected to a single antenna, and we kept track of the offset between both traveling units in all the visited sites. An external validation of the resulting hardware delays is provided against the time scale differences derived from the UTC - UTC(k) data published by BIPM in its monthly Circular T. Thanks to a very good stability of the traveling equipment, we obtained expanded uncertainty estimates within 2.0 ns (k = 2) for the hardware delays.","PeriodicalId":57667,"journal":{"name":"时间频率公报","volume":"225 1","pages":"643-648"},"PeriodicalIF":0.0,"publicationDate":"2015-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81815223","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 : 2015-04-12DOI: 10.1109/FCS.2015.7138790
J. Belfi, A. D. Di Virgilio, N. Beverini, G. Carelli, E. Maccioni, A. Simonelli, R. Santagata
Large frame ring laser gyros performances are ultimately limited by the instabilities of their geometrical parameters. We present the experimental activity on the GP2 ring laser gyro. GP2 is a ring laser gyro devoted to develop advanced stabilization techniques of the ring cavity geometrical scale-factor. A method based on optical interferometry has been developed for canceling the deformations of the resonator. The method is based on the measurement and stabilization of the absolute length of the cavity perimeter and of the resonators formed by the opposite cavity mirrors. The optical frequency reference in the experiment is an iodine-stabilized He-Ne laser, with a relative frequency stability of 10-11. The measurement of the absolute length of the two resonators has been demonstrated up to now on a test bench. We discuss the experimental results on GP2: the present performances as a ring laser gyro and the stabilization scheme to be implemented in the near future.
{"title":"Geometrical scale-factor stabilization of square cavity ring laser gyroscopes","authors":"J. Belfi, A. D. Di Virgilio, N. Beverini, G. Carelli, E. Maccioni, A. Simonelli, R. Santagata","doi":"10.1109/FCS.2015.7138790","DOIUrl":"https://doi.org/10.1109/FCS.2015.7138790","url":null,"abstract":"Large frame ring laser gyros performances are ultimately limited by the instabilities of their geometrical parameters. We present the experimental activity on the GP2 ring laser gyro. GP2 is a ring laser gyro devoted to develop advanced stabilization techniques of the ring cavity geometrical scale-factor. A method based on optical interferometry has been developed for canceling the deformations of the resonator. The method is based on the measurement and stabilization of the absolute length of the cavity perimeter and of the resonators formed by the opposite cavity mirrors. The optical frequency reference in the experiment is an iodine-stabilized He-Ne laser, with a relative frequency stability of 10-11. The measurement of the absolute length of the two resonators has been demonstrated up to now on a test bench. We discuss the experimental results on GP2: the present performances as a ring laser gyro and the stabilization scheme to be implemented in the near future.","PeriodicalId":57667,"journal":{"name":"时间频率公报","volume":"3 1","pages":"51-55"},"PeriodicalIF":0.0,"publicationDate":"2015-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88200718","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 : 2015-04-12DOI: 10.1109/FCS.2015.7138878
L. Bai, Meina Xuan, Yuzhen Jin, Bo Ye, Zhenjian Cui, W. Zhou
Based on the border effect and relevant theories, it is found that measurement precision depends on resolution stability which is much higher than resolution itself. With the help of this new theory and the more sensitive discrimination of the border of a fuzzy area, it is possible to greatly improve the measurement precision. Since there are a lot of complicated frequency signals in quantum frequency standards, telecommunication, fundamental subjects and other fields, precise measurement is significantly important. In a great deal of measurement of complicated frequency signals, discrete fuzzy areas are common. In this paper, we put forward a feasible and high-precision frequency measurement scheme to make it easier to capture border information, which shows great advantages of border effect.
{"title":"Precise measurement of complicated frequency signals","authors":"L. Bai, Meina Xuan, Yuzhen Jin, Bo Ye, Zhenjian Cui, W. Zhou","doi":"10.1109/FCS.2015.7138878","DOIUrl":"https://doi.org/10.1109/FCS.2015.7138878","url":null,"abstract":"Based on the border effect and relevant theories, it is found that measurement precision depends on resolution stability which is much higher than resolution itself. With the help of this new theory and the more sensitive discrimination of the border of a fuzzy area, it is possible to greatly improve the measurement precision. Since there are a lot of complicated frequency signals in quantum frequency standards, telecommunication, fundamental subjects and other fields, precise measurement is significantly important. In a great deal of measurement of complicated frequency signals, discrete fuzzy areas are common. In this paper, we put forward a feasible and high-precision frequency measurement scheme to make it easier to capture border information, which shows great advantages of border effect.","PeriodicalId":57667,"journal":{"name":"时间频率公报","volume":"83 1","pages":"445-447"},"PeriodicalIF":0.0,"publicationDate":"2015-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88609328","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 : 2015-04-12DOI: 10.1109/FCS.2015.7138854
F. Vernotte, M. Lenczner, P. Bourgeois, E. Rubiola
This work is motivated by the wish to have the most precise measurement of a frequency ν and of the variance σy2 of its fractional fluctuations in a given time τ, out of high-end general-purpose instruments. Thanks to the progress of digital electronics, new time-interval analyzers have been made available in the last few years. Such instruments measure the time stamp of the input events at high sampling speed (MS/s), and with high resolution (10-100 ps). We propose the linear regression as a means to estimate the frequency from time stamps of the input signal. The frequency counter based on the linear regression is called Ω counter. The linear regression is interpreted as a finite impulse response filter which takes the frequency samples as the input, and delivers the estimated frequency at the output. We derive the transfer function of such filter, which turns out to be parabolic shaped. As compared to the H and Λ counters, the Ω counter features better rejection of the background noise. We define the quadratic variance (QVAR), a wavelet variance similar to the Allan variance, and we derive its statistical properties. The QVAR is superior to the AVAR and MVAR in the rejection of the background noise.
{"title":"Least-square fit, Ω counters, and quadratic variance","authors":"F. Vernotte, M. Lenczner, P. Bourgeois, E. Rubiola","doi":"10.1109/FCS.2015.7138854","DOIUrl":"https://doi.org/10.1109/FCS.2015.7138854","url":null,"abstract":"This work is motivated by the wish to have the most precise measurement of a frequency ν and of the variance σy2 of its fractional fluctuations in a given time τ, out of high-end general-purpose instruments. Thanks to the progress of digital electronics, new time-interval analyzers have been made available in the last few years. Such instruments measure the time stamp of the input events at high sampling speed (MS/s), and with high resolution (10-100 ps). We propose the linear regression as a means to estimate the frequency from time stamps of the input signal. The frequency counter based on the linear regression is called Ω counter. The linear regression is interpreted as a finite impulse response filter which takes the frequency samples as the input, and delivers the estimated frequency at the output. We derive the transfer function of such filter, which turns out to be parabolic shaped. As compared to the H and Λ counters, the Ω counter features better rejection of the background noise. We define the quadratic variance (QVAR), a wavelet variance similar to the Allan variance, and we derive its statistical properties. The QVAR is superior to the AVAR and MVAR in the rejection of the background noise.","PeriodicalId":57667,"journal":{"name":"时间频率公报","volume":"56 S1","pages":"338-342"},"PeriodicalIF":0.0,"publicationDate":"2015-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/FCS.2015.7138854","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72536401","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 : 2015-04-12DOI: 10.1109/FCS.2015.7138873
P. Morley
Optimization of the acceleration sensitivity of quartz crystal resonators has been a challenging problem for resonator designers for decades. The structural symmetry of the resonator and mount combination has been shown in past work, both theoretical and practical, to have a strong influence on acceleration sensitivity, and specialized structures have been developed [1], [2], [3] that have greatly improved performance. However, with applications such as airborne radar systems, there is a persistent demand for further improvement. The design of many of the practical high-stability resonator products that have a need for good acceleration sensitivity is also constrained by other attributes, such as high quality factor, and these constraints typically result in a low-frequency overtone device with a fully contoured resonator element design. In this paper, the effect of the concentricity of the contour shape on the quartz disk in contoured resonators is considered, and results are presented that demonstrate a strong correlation between the contour offset from the blank center and the acceleration sensitivity of the resonator. Methods are also described for measurement of the contour position relative to the perimeter of the disk.
{"title":"The effect of contour concentricity on the acceleration sensitivity of quartz crystal resonators","authors":"P. Morley","doi":"10.1109/FCS.2015.7138873","DOIUrl":"https://doi.org/10.1109/FCS.2015.7138873","url":null,"abstract":"Optimization of the acceleration sensitivity of quartz crystal resonators has been a challenging problem for resonator designers for decades. The structural symmetry of the resonator and mount combination has been shown in past work, both theoretical and practical, to have a strong influence on acceleration sensitivity, and specialized structures have been developed [1], [2], [3] that have greatly improved performance. However, with applications such as airborne radar systems, there is a persistent demand for further improvement. The design of many of the practical high-stability resonator products that have a need for good acceleration sensitivity is also constrained by other attributes, such as high quality factor, and these constraints typically result in a low-frequency overtone device with a fully contoured resonator element design. In this paper, the effect of the concentricity of the contour shape on the quartz disk in contoured resonators is considered, and results are presented that demonstrate a strong correlation between the contour offset from the blank center and the acceleration sensitivity of the resonator. Methods are also described for measurement of the contour position relative to the perimeter of the disk.","PeriodicalId":57667,"journal":{"name":"时间频率公报","volume":"25 1","pages":"427-431"},"PeriodicalIF":0.0,"publicationDate":"2015-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75712807","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 : 2015-04-12DOI: 10.1109/FCS.2015.7138919
D. Pan, Xiaobo Xue, Xiang Peng, Jingbiao Chen, Hong Guo, Bin Luo
We realize a Faraday anomalous dispersion optical filter (FADOF) operating on the 88Sr (5s2)1S0-(5s5p)1P1 transition, utilizing a strontium hollow cathode lamp (HCL). At the magnetic field strength of 1460 G and the HCL discharge current of 22 mA, a single transmission peak with a maximum transmission of 28.8% is obtained. The dependence of transmission on magnetic field and HCL discharge current is qualitatively studied. This demonstration will be used to build a Faraday laser, which will be applied in the Sr optical clock.
{"title":"Faraday anomalous dispersion optical filter at 461nm utilizing a strontium hollow cathode lamp","authors":"D. Pan, Xiaobo Xue, Xiang Peng, Jingbiao Chen, Hong Guo, Bin Luo","doi":"10.1109/FCS.2015.7138919","DOIUrl":"https://doi.org/10.1109/FCS.2015.7138919","url":null,"abstract":"We realize a Faraday anomalous dispersion optical filter (FADOF) operating on the <sup>88</sup>Sr (5s<sup>2</sup>)<sup>1</sup>S<sub>0</sub>-(5s5p)<sup>1</sup>P<sub>1</sub> transition, utilizing a strontium hollow cathode lamp (HCL). At the magnetic field strength of 1460 G and the HCL discharge current of 22 mA, a single transmission peak with a maximum transmission of 28.8% is obtained. The dependence of transmission on magnetic field and HCL discharge current is qualitatively studied. This demonstration will be used to build a Faraday laser, which will be applied in the Sr optical clock.","PeriodicalId":57667,"journal":{"name":"时间频率公报","volume":"49 1","pages":"611-613"},"PeriodicalIF":0.0,"publicationDate":"2015-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73330640","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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