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Proceedings of the 2004 IEEE International Frequency Control Symposium and Exposition, 2004.最新文献

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Progress on 10 Kelvin cryo-cooled sapphire oscillator 10开尔文低温冷却蓝宝石振荡器的研究进展
Proceedings of the 2004 IEEE International Frequency Control Symposium and Exposition, 2004. Pub Date : 2004-08-24 DOI: 10.1109/FREQ.2004.1418560
R.T. Wang, G. Dick, W. Diener
{"title":"Progress on 10 Kelvin cryo-cooled sapphire oscillator","authors":"R.T. Wang, G. Dick, W. Diener","doi":"10.1109/FREQ.2004.1418560","DOIUrl":"https://doi.org/10.1109/FREQ.2004.1418560","url":null,"abstract":"We present recent progress on the 10 Kelvin cryocooled sapphire oscillator (10 K CSO). Included are incorporation of a new pulse tube cryocooler, cryocooler vibration comparisons between G-M and pulse-tube types, phase noise, and frequency stability tests. For the advantage of a single stage pulse tube cryocooler, we also present results for a 40 K compensated sapphire oscillator (40 K CSO).","PeriodicalId":369162,"journal":{"name":"Proceedings of the 2004 IEEE International Frequency Control Symposium and Exposition, 2004.","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126932190","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: 12
Performance of the PARCS testbed cesium fountain frequency standard PARCS试验台性能铯喷泉频率标准
Proceedings of the 2004 IEEE International Frequency Control Symposium and Exposition, 2004. Pub Date : 2004-08-24 DOI: 10.1109/FREQ.2004.1418565
D. Enzer, W. Klipstein
{"title":"Performance of the PARCS testbed cesium fountain frequency standard","authors":"D. Enzer, W. Klipstein","doi":"10.1109/FREQ.2004.1418565","DOIUrl":"https://doi.org/10.1109/FREQ.2004.1418565","url":null,"abstract":"A cesium fountain frequency standard has been developed as a ground testbed for the PARCS (primary atomic reference clock in space) experiment - an experiment intended to fly on the International Space Station. We report on the performance of the fountain and describe some of the implementations motivated in large part by flight considerations, but of relevance for ground fountains. In particular, we report on a new technique for delivering cooling and trapping laser beams to the atom collection region, in which a given beam is recirculated three times effectively providing much more optical power than traditional configurations. Allan deviations down to 10/sup -15/ have been achieved with this method.","PeriodicalId":369162,"journal":{"name":"Proceedings of the 2004 IEEE International Frequency Control Symposium and Exposition, 2004.","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132422619","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: 8
Thermal transient effect of Y-cut langanite and langatate y型朗长石和朗长石的热瞬态效应
Proceedings of the 2004 IEEE International Frequency Control Symposium and Exposition, 2004. Pub Date : 2004-08-23 DOI: 10.1109/FREQ.2004.1418531
Yoonkee Kim
{"title":"Thermal transient effect of Y-cut langanite and langatate","authors":"Yoonkee Kim","doi":"10.1109/FREQ.2004.1418531","DOIUrl":"https://doi.org/10.1109/FREQ.2004.1418531","url":null,"abstract":"The thermal transient effect of a Y-cut langanite (LGN) resonator and a Y-cut langatate (LGT) resonator is measured with various rates of linear temperature-time ramp. The resonators are vacuum-sealed in two-point-mounted or four-point-mounted enclosures. The nominal frequency of the resonators is 10 MHz 5/sup th/ overtone (OT) and the modes from the fundamental to the 7/sup th/ OT are measured. The results show an improvement over AT-cut quartz resonators. The dynamic thermal sensitivity coefficient of the 5/sup th/ OT two-point-mounted LGT resonator is only 15% of that of 5 MHz 5/sup th/ OT AT-cut quartz resonators.","PeriodicalId":369162,"journal":{"name":"Proceedings of the 2004 IEEE International Frequency Control Symposium and Exposition, 2004.","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121308418","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: 6
In-plane mode shape visualization of piezoelectric resonators using stroboscopic laser irradiation 频闪激光辐照压电谐振器的平面内模态形状显示
Proceedings of the 2004 IEEE International Frequency Control Symposium and Exposition, 2004. Pub Date : 2004-08-23 DOI: 10.1109/FREQ.2004.1418526
Y. Watanabe, K. Tsuno, T. Tsuda, S. Goka, T. Sato, H. Sekimoto
{"title":"In-plane mode shape visualization of piezoelectric resonators using stroboscopic laser irradiation","authors":"Y. Watanabe, K. Tsuno, T. Tsuda, S. Goka, T. Sato, H. Sekimoto","doi":"10.1109/FREQ.2004.1418526","DOIUrl":"https://doi.org/10.1109/FREQ.2004.1418526","url":null,"abstract":"A full-field imaging method has been presented that rapidly measures the in-plane mode shapes of piezoelectric devices with a laser system synchronized to the resonator driving signal. By using two images of the maximum difference in interference conditions, measurement sensitivity was improved to 15 dB as converted to the resonator drive level. The measurement results for a 100 MHz fundamental resonator were not completely clear, but the vibrational area was-clearly identified with the proposed method. We also estimated the absolute vibrational amplitude of high-frequency resonators with the proposed system, based on the laser speckle method.","PeriodicalId":369162,"journal":{"name":"Proceedings of the 2004 IEEE International Frequency Control Symposium and Exposition, 2004.","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126013524","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: 4
Mechanically-coupled micromechanical resonator arrays for improved phase noise 改善相位噪声的机械耦合微机械谐振器阵列
Proceedings of the 2004 IEEE International Frequency Control Symposium and Exposition, 2004. Pub Date : 2004-08-23 DOI: 10.1109/FREQ.2004.1418444
Seungbae Lee, C. Nguyen
{"title":"Mechanically-coupled micromechanical resonator arrays for improved phase noise","authors":"Seungbae Lee, C. Nguyen","doi":"10.1109/FREQ.2004.1418444","DOIUrl":"https://doi.org/10.1109/FREQ.2004.1418444","url":null,"abstract":"Reductions in phase noise by more than 26 dB have been obtained over previous micromechanical resonator oscillators by replacing the single resonator normally used in such oscillators with a mechanically coupled array of them to effectively raise the power handling ability of the frequency selective tank by a factor equal to the number of resonators used in the array, and all with virtually no increase in volume or cost, given that all resonators are integrated onto a single die using batch processed MEMS technology. Specifically, a mechanically coupled array of ten 15.4-MHz 40/spl mu/m/spl times/10/spl mu/m/spl times/2/spl mu/m free-free beams embedded in a positive feedback loop with a single-ended to differential transimpedance sustaining amplifier achieves phase noise of -109 and -133 dBc/Hz at 1 kHz and far-from-carrier offset frequencies, respectively. When divided down to 10 MHz, these effectively correspond to -112 and -136 dBc/Hz, respectively, which represent more than 17 and 26 dB improvements over recently published work with clamped-clamped beam resonator oscillators.","PeriodicalId":369162,"journal":{"name":"Proceedings of the 2004 IEEE International Frequency Control Symposium and Exposition, 2004.","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126143033","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: 52
Photonic microwave oscillator using mode-locked laser as the high Q resonator 以锁模激光为高Q谐振腔的光子微波振荡器
Proceedings of the 2004 IEEE International Frequency Control Symposium and Exposition, 2004. Pub Date : 2004-08-23 DOI: 10.1109/FREQ.2004.1418456
N. Yu, E. Salik, L. Maleki
{"title":"Photonic microwave oscillator using mode-locked laser as the high Q resonator","authors":"N. Yu, E. Salik, L. Maleki","doi":"10.1109/FREQ.2004.1418456","DOIUrl":"https://doi.org/10.1109/FREQ.2004.1418456","url":null,"abstract":"We show that an actively mode-locked laser can serve as a high Q microwave resonator in a photonic oscillator. The high Q is due to the high regenerative gain of the optical modes which generate a beat note at a photodetector as the microwave signal. In a fiber mode-locked laser setup, we have demonstrated the generation of a 10 GHz microwave signal with phase noise of -140 dBc/Hz at the offset frequency of 10 kHz. We have also found that the effective Q of the resonator depends on the optical pulse width.","PeriodicalId":369162,"journal":{"name":"Proceedings of the 2004 IEEE International Frequency Control Symposium and Exposition, 2004.","volume":"115 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116452919","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: 8
A new oscillator circuit effective in frequency range 100 MHz to 1 GHz 一种新的振荡器电路，有效频率范围为100mhz ~ 1ghz
Proceedings of the 2004 IEEE International Frequency Control Symposium and Exposition, 2004. Pub Date : 2004-08-23 DOI: 10.1109/FREQ.2004.1418551
T. Adachi, M. Kawagishi, S. Izumiya, N. Nomura, Y. Aoyagi
{"title":"A new oscillator circuit effective in frequency range 100 MHz to 1 GHz","authors":"T. Adachi, M. Kawagishi, S. Izumiya, N. Nomura, Y. Aoyagi","doi":"10.1109/FREQ.2004.1418551","DOIUrl":"https://doi.org/10.1109/FREQ.2004.1418551","url":null,"abstract":"We have proposed a new piezoelectric oscillator circuit suitable for use in frequency range 100 MHz to 1 GHz. The proposed oscillator is composed of a Colpitts oscillator and a two-stage common-emitter amplifier. The amplifier picks up the signal from the emitter of the oscillator transistor and feeds back the amplified signal to the base of the oscillator transistor via its base-collector capacitance. Simulation has shown that sufficiently large negative resistance can be obtained compared to the usual Colpitts oscillator. Other major performance factors have the values for practical use. Experiments with a 622 MHz voltage controlled SAW oscillator have agreed with the simulated results.","PeriodicalId":369162,"journal":{"name":"Proceedings of the 2004 IEEE International Frequency Control Symposium and Exposition, 2004.","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122369504","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
Dual photonic-delay line cross correlation method for phase noise measurement 相位噪声测量的双光子-延迟线互相关法
Proceedings of the 2004 IEEE International Frequency Control Symposium and Exposition, 2004. Pub Date : 2004-08-23 DOI: 10.1109/FREQ.2004.1418469
E. Salik, N. Yu, L. Maleki, E. Rubiola
{"title":"Dual photonic-delay line cross correlation method for phase noise measurement","authors":"E. Salik, N. Yu, L. Maleki, E. Rubiola","doi":"10.1109/FREQ.2004.1418469","DOIUrl":"https://doi.org/10.1109/FREQ.2004.1418469","url":null,"abstract":"We describe the application of a cross-correlation method with dual photonic delay-line for homodyne phase noise measurement of low-noise microwave oscillators. This method combines a delay-line discriminator and cross correlation with the use of a low-loss kilometer-long photonic delay. By using a 4.5 km optical fiber as a photonic delay, we demonstrated a measurement noise floor of -158 dBc/Hz at 10 kHz offset without a reference oscillator.","PeriodicalId":369162,"journal":{"name":"Proceedings of the 2004 IEEE International Frequency Control Symposium and Exposition, 2004.","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114164882","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: 41
Pound circuit-induced frequency sensitivities in ultra-stable cryogenic oscillators 超稳定低温振荡器的庞德电路感应频率灵敏度
Proceedings of the 2004 IEEE International Frequency Control Symposium and Exposition, 2004. Pub Date : 2004-08-23 DOI: 10.1109/FREQ.2004.1418457
G. Dick
{"title":"Pound circuit-induced frequency sensitivities in ultra-stable cryogenic oscillators","authors":"G. Dick","doi":"10.1109/FREQ.2004.1418457","DOIUrl":"https://doi.org/10.1109/FREQ.2004.1418457","url":null,"abstract":"The Pound technique is widely used in ultra-stable cryogenic oscillators to prevent frequency drift due to variations in the path delay between room-temperature electronics and the cryogenic resonator. We calculate frequency sensitivities to several other microwave signal corruptions that are not rejected by the Pound technique. Considering only linear circuit elements, we identify a quadratic variation of phase with frequency and a linear variation of amplitude with frequency as the lowest order processes that can induce frequency offsets. As an example, we evaluate the consequence of this frequency sensitivity for thermally induced frequency variation in an image-rejection filter.","PeriodicalId":369162,"journal":{"name":"Proceedings of the 2004 IEEE International Frequency Control Symposium and Exposition, 2004.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129593426","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
Development of SAW pressure sensor using ZnO/Si structure ZnO/Si结构SAW压力传感器的研制
Proceedings of the 2004 IEEE International Frequency Control Symposium and Exposition, 2004. Pub Date : 2004-08-23 DOI: 10.1109/FREQ.2004.1418521
A. Talbi, F. Sarry, L. Le Brizoual, O. Elmazria, P. Alnot
{"title":"Development of SAW pressure sensor using ZnO/Si structure","authors":"A. Talbi, F. Sarry, L. Le Brizoual, O. Elmazria, P. Alnot","doi":"10.1109/FREQ.2004.1418521","DOIUrl":"https://doi.org/10.1109/FREQ.2004.1418521","url":null,"abstract":"SAW devices have been shown to be suitable for many sensor applications. One of these applications is the pressure sensor. In this study, we present our ZnO deposition process. We also investigate the performance of SAW pressure sensors formed with a ZnO/Si(001) structure. The pressure sensitivities of the Rayleigh mode as well as the Sezawa mode are studied as a function of normalized thickness (kh=2/spl pi/h/sub ZnO///spl lambda/). The experimental results show an opposite strain effect in the ZnO layer and Si substrate. A theoretical approach was developed to show the particle displacement. For a low kh/sub ZnO/ value, the ZnO and Si medium contribute to the sensor sensitivity. For higher kh/sub ZnO/ values, the particle displacement is mainly confined in the ZnO layer. This confirmed the opposite behaviors of the sensitivity with the kh/sub ZnO/ value. Enhancement of the SAW sensitivity is also presented by the development of a pressure membrane based on the developed device.","PeriodicalId":369162,"journal":{"name":"Proceedings of the 2004 IEEE International Frequency Control Symposium and Exposition, 2004.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128581471","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: 5
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