Abstract
Ultrastable cryogenic microwave oscillators are secondary frequency standards in the microwave domain. The best of these oscillators have demonstrated a short term frequency stability in the range 10−14 to a few times 10−16. The main application for these oscillators is as flywheel oscillators for the next generation of passive atomic frequency standards, and as local oscillators in space telemetry ground stations to clean up the transmitter close in phase noise. Fractional frequency stabilities of passive atomic frequency standards are now approaching 3 × 10−14/√τ where τ is the measurement time, limited only by the number of atoms that are being interrogated. This requires an interrogation oscillator whose short-term stability is of the order of 10−14 or better, which cannot be provided by present-day quartz technology. Ultrastable cryogenic microwave oscillators are based on resonators which have very high electrical Q-factors. The resolution of the resonator’s linewidth is typically limited by electronics noise to about 1 ppm and hence Q-factors in excess of 108 are required. As these are only attained in superconducting cavities or sapphire resonators at low temperatures, use of liquid helium cooling is mandatory, which has so far restricted these oscillators to the research or metrology laboratory. Recently, there has been an effort to dispense with the need for liquid helium and make compact flywheel oscillators for the new generation of primary frequency standards. Work is under way to achieve this goal in space-borne and mobile liquid-nitrogen-cooled systems. The best cryogenic oscillators developed to date are the “whispering gallery” (WG) mode sapphire resonator-oscillators of NASA’s Jet Propulsion Laboratory (JPL) and the University of Western Australia (UWA), as well as Stanford University’s superconducting cavity stabilized oscillator (SCSO). All of these oscillators have demonstrated frequency stabilities in the range of a few times 10−15 to a few times 10−16. In this contribution we review only liquid-helium-cooled secondary frequency standards, such as those just mentioned, which have attained frequency stabilities of 10-14 or better.
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References
S. R. Stein, J. P. Turneaure: Superconducting-cavity stabilized oscillators with improved frequency stability. Proc. IEEE 63, 1249–1250 (1975)
S. R. Stein, J. P. Turneaure: Development of the Superconducting Cavity Oscillator. (Freeman, New York 1988)pp. 414–430
J. A. Barnes: Characterization of frequency stability. IEEE Trans. Instrum. Meas. 20, 105–120 (1971)
V. B. Braginsky, V. I. Panov: Superconducting resonators on sapphire. IEEE Trans. Magn. 15, 30–32 (1979)
V. B. Braginsky, V. P. Mitrofanov, V. I. Panov: Systems With Small Dissipation. (Univ. Chicago Press, Chicago 1985)
V. B. Braginsky, V. S. Ilchenko, K. S. Bagdassarov: Experimental observation of fundamental microwave absorption in high quality dielectric crystals. Phys. Lett. A 120, 300–305 (1987)
V. L. Gurevich, A. K. Tagantsev: Intrinsic dielectric loss in crystals: low temperatures. Sov. Phys. JETP 64, 142–151 (1986)
D. M. Strayer, G. J. Dick, J. E. Mercereau: Performance of a superconducting cavity stabilized ruby maser oscillator. IEEE Trans. Magn. 23, 1624–1628 (1987)
G. J. Dick, R. T. Wang: Ultra-stable performance of the superconducting cavity maser. IEEE Trans. Instrum. Meas. 40, 174–177 (1991)
A. J. Giles, A. G. Mann, S. K. Jones, D. G. Blair, M. J. Buckingham: A very high stability sapphire loaded superconducting cavity oscillator. Physica B 165, 145–146 (1990)
A. J. Giles, S. K. Jones, D. G. Blair, M. J. Buckingham: A high stability microwave oscillator based on a sapphire loaded superconducting cavity. IEEE Freq. Control Symp. Proc. 43, 89–93 (1989)
A. N. Luiten, A. G. Mann, M. E. Costa, D. G. Blair: Power stabilized cryogenic sapphire resonator oscillator. IEEE Trans. Instrum. Meas. 44, 132–135 (1995)
A. N. Luiten, A. G. Mann, D. G. Blair: Cryogenic sapphire microwave resonator-oscillator with exceptional stability. Electron. Lett. 30, 417–419 (1994)
Crystal Systems Inc., 27 Congress St., Salem, MA 01970, USA, private communication
A. N. Luiten, A. G. Mann, D. G. Blair: Ultra High-Q factor cryogenic sapphire resonator. Electron. Lett. 29, 879–881 (1993)
A. N. Luiten, A. G. Mann, D. G. Blair: Paramagnetic susceptibility and permittivity measurements at microwave frequencies in cryogenic sapphire resonators. J. Phys. D 29, 2082–2090 (1996)
A. N. Luiten, A. G. Mann, N. McDonald, D. G. Blair: Latest results of the UWA cryogenic sapphire oscillator. IEEE Freq. Control Symp. Proc. 49, 433–437 (1995)
G. J. Dick, R. T.Wang: Cryo-cooled sapphire oscillator for the Cassini Ka-band experiment. IEEE Int. Freq. Control Symp. Proc. 51, 1009–1014 (1997)
G. J. Dick, R. T.Wang, R. T. Tjoelker: Cryo-cooled sapphire oscillator with ultra-high stability. IEEE Int. Freq. Control Symp. Proc. 52, 528–533 (1998)
J. P. Turneaure, S. Stein: Atomic Masses and Fundamental Constants V (Plenum, New York 1976)pp. 636–642
G. Santarelli, P. Laurent, A. Clairon, G. J. Dick, C. A. Greenhall, C. Audoin: Theoretical description and experimental evaluation of the effect of the interrogation oscillator frequency noise on the stability of a pulsed atomic frequency standard. IEEE 10th Europ. Freq. Time Forum, Conf. Publ. No 418 (1996)pp. 66–71
G. D. Rovera, G. Santarelli, A. Clairon: Frequency synthesis chain for the atomic fountain primary frequency standard. IEEE Trans. Ultrason. Ferroelec. Freq. Control 43, 354–358 (1996)
P. T. H. Fisk, M. J. Sellars, M. A. Lawn, C. Coles: Accurate measurement of the 12.6 GHz “Clock” transition in trapped 171Yb+. IEEE Trans. Ultrason. Ferroelec. Freq. Control 44, 344–354 (1997)
A. G. Mann, G. Santarelli, S. Chang, A. N. Luiten, P. Laurent, C. Salomon, D. G. Blair, A. Clairon: A high stability atomic fountain clock using a cryogenic sapphire interrogation oscillator. IEEE Freq. Control Symp. Proc. 52, 13–22 (1998)
R. L. Toelker, C. Bricker, W. Diener, R. L. Hamell, A. Kirk, P. Kuhnle, L. Maleki, J. D. Prestage, D. Santiago, D. Seidel, D. A. Stowers, R. L. Syndnor, T. Tucker: A mercury ion frequency standard engineering prototype for the NASA Deep Space Network. IEEE Int. Freq. Control Symp. Proc. 50, 1073–1081 (1996)
T. C. P. Chui, P. Day, I. Hahn, A. E. Nash, D. R. Swanson, J. A. Nissem, P. R. Williamson, J. A. Lipa: High resolution thermometers for ground and space applications. Cryogenics 34, 417–420 (1994)
S. Buchman, J. P. Turneaure, J. A. Lipa, M. Dong, K. M. Cumbermack, S. Wang: A superconducting microwave oscillator clock for use on the space station. IEEE Int. Freq. Control Symp. Proc. 52, 534–539 (1998)
J. Krupka, K. Derzakowski, A. Abramowicz, M. Tobar, R. Geyer: Complex permittivity measurements of extremely low loss dielectric materials using whispering gallery modes. 1997 IEEE Int. Microwave Symp. Dig. 3, 1347–1350 (1997)
B. M. Garin: One phonon dielectric losses by excitation of sound. Sov. Phys. Solid State 32, 1917–1920 (1990)
A. G. Mann, A. N. Luiten, D. G. Blair, M. J. Buckingham: Ultrastable cryogenic sapphire dielectric microwave resonators. Proc. IEEE Freq. Control Symp. 46, 167–171 (1992)
S. Thakoor, D. M. Strayer, G. J. Dick, J. E. Mercereau: A lead-on-sapphire superconducting cavity of superior quality. J. Appl. Phys. 59, 854–858 (1986)
D. G. Blair, S. Chang, E. N. Ivanov, A. N. Luiten, A. G. Mann, M. E. Tobar, R. A. Woode: Ultrastable and ultralow phase noise microwave sapphire oscillators. Proc. NASA Workshop on the Scientific Applications of Clocks in Space, JPL pub 97-15, 101–125 (1996)
S. N. Buckley, P. Agnew, G. P. Pells: Cryogenic dielectric properties of sapphire at 2.45 GHz. J. Phys. D 27, 2202–2209 (1994)
A. G. Mann, D. G. Blair, M. J. Buckingham: Ultra-stable cryogenic sapphire dielectric microwave resonators: mode frequency—temperature compensation by residual paramagnetic impurities. J. Phys. D 25, 1105–1109 (1992)
J. G. Hartnett, M. E. Tobar, A. G. Mann, J. Krupka, E. N. Ivanov: Temperature dependence of Ti3+ doped sapphire whispering gallery mode resonator. Electron. Lett. 34, 195–196 (1998)
J. G. Hartnett, M. E. Tobar, A. G. Mann, E. N. Ivanov, J. Krupka, R. Geyer: Frequency-temperature compensation in Ti3+ and Ti4+ doped sapphire whispering gallery mode resonators. IEEE Trans. Ultrason. Ferroelec. Freq. Control 46, 993–1000 (1999)
A. N. Luiten: Sapphire secondary frequency standards. Ph.D. thesis, Physics Department, University of Western Australia (1995)
S. K. Jones, D. G. Blair, M. J. Buckingham: The effects of paramagnetic impurities on the frequency of sapphire loading superconducting resonators. Electron. Lett. 24, 346–347 (1988)
A. N. Luiten, A. G. Mann, A. J. Giles, D. G. Blair: Ultra-stable sapphire resonator-oscillator. IEEE Trans. Instrum. Meas. 42, 439–443 (1993)
L. S. Kornienko, A. M. Prokhorov: Electronic paramagnetic resonance of the Ti3+ ion in corundum. Sov. Phys. JETP 11, 1189–1190 (1960)
S. Chang, A. G. Mann, A. N. Luiten, D. G. Blair: Measurements of radiation pressure effect in cryogenic sapphire dielectric resonators. Phys. Rev. Lett. 79, 2141–2144 (1997)
D. G. Santiago, G. J. Dick, A. Prata: Mode control of cryogenic whispering-gallery mode sapphire dielectric-ring resonators. IEEE Trans. Microwave Theory Tech. 42, 52–55 (1994)
D. G. Santiago, G. J. Dick: Microwave frequency discriminator with a cryogenic sapphire resonator for ultra-low phase noise. IEEE Freq. Control Symp. Proc. 46, 176–182 (1992)
R. C. Taber, C. A. Florey: Microwave oscillators incorporating cryogenic sapphire dielectric resonators. IEEE Trans. Ultrason. Ferroelec. Freq. Control 42, 111–119 (1995)
M. E. Tobar, A. J. Giles, S. Edwards, J. Searls: High-Q thermo-electric stabilized sapphire microwave resonators for low noise applications. IEEE Trans. Ultrason. Ferroelec. Freq. Control 41, 391–396 (1994)
V. B. Braginskii, S. P. Vyatchanin, V. I. Panov: Limiting stability of the frequency of self-excited oscillators. Sov. Phys. Doklady 24, 562–563 (1979)
D. G. Santiago, G. J. Dick, R. T. Wang: Frequency stability of 10-13 in a compensated sapphire oscillator operating above 77 K. IEEE Int. Freq. Control Symp. Proc. 50, 772–775 (1996)
P. Boolchand, G. H. Lemon, W. J. Bresser, R. N. Enzweller, R. Harris: A general purpose cold finger using a vibration-free mounted He closed-cycle cryostat. Rev. Sci. Instrum. 66, 3015–3057 (1995)
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Mann, A.G. (2001). Ultrastable Cryogenic Microwave Oscillators. In: Luiten, A.N. (eds) Frequency Measurement and Control. Topics in Applied Physics, vol 79. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-44991-4_3
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