Ultra-high stability cryocooled sapphire microwave oscillators

Ashby Hilton; J.G. Hartnett; Eugene Ivanov; Andre Luiten

doi:10.1109/FCS.2014.6859925

Ultra-high stability cryocooled sapphire microwave oscillators

Ashby Hilton, J.G. Hartnett, Eugene Ivanov, Andre Luiten

Graduate Research School

Research output: Chapter in Book/Conference paper › Conference paper

Abstract

Two nominally identical microwave cryocooled sapphire oscillators (CSO) have been implemented at the University of Adelaide. The sapphire resonators have a turning point in their frequency-temperature dependence at approximately 6 K, which delivers first-order insensitivity to temperature fluctuations when operated at this point. Using a closed system ultra-low vibration pulse-tube cryocooler with a specially design cryostat [1], it is possible to control the rms temperature fluctuations at the resonator to the 10 μK level, while maintaining a low vibration environment. Combined with a loaded Q-factor of about 109, similar oscillators have shown an Allan deviation of fractional frequency fluctuations of σy = 5.8×10 -16 at 1 s [2]. © 2014 IEEE.

Original language	English
Title of host publication	IFCS 2014 - 2014 IEEE International Frequency Control Symposium, Proceedings
Place of Publication	Piscataway, NJ, USA
Publisher	IEEE, Institute of Electrical and Electronics Engineers
Pages	312
Volume	1
ISBN (Print)	9781479949168
DOIs	https://doi.org/10.1109/FCS.2014.6859925
Publication status	Published - 2014
Event	Ultra-high stability cryocooled sapphire microwave oscillators - Taipei, Taiwan Duration: 1 Jan 2014 → …

Conference

Conference	Ultra-high stability cryocooled sapphire microwave oscillators
Period	1/01/14 → …

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10.1109/FCS.2014.6859925

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title = "Ultra-high stability cryocooled sapphire microwave oscillators",

abstract = "Two nominally identical microwave cryocooled sapphire oscillators (CSO) have been implemented at the University of Adelaide. The sapphire resonators have a turning point in their frequency-temperature dependence at approximately 6 K, which delivers first-order insensitivity to temperature fluctuations when operated at this point. Using a closed system ultra-low vibration pulse-tube cryocooler with a specially design cryostat [1], it is possible to control the rms temperature fluctuations at the resonator to the 10 μK level, while maintaining a low vibration environment. Combined with a loaded Q-factor of about 109, similar oscillators have shown an Allan deviation of fractional frequency fluctuations of σy = 5.8×10 -16 at 1 s [2]. {\textcopyright} 2014 IEEE.",

author = "Ashby Hilton and J.G. Hartnett and Eugene Ivanov and Andre Luiten",

year = "2014",

doi = "10.1109/FCS.2014.6859925",

language = "English",

isbn = "9781479949168",

volume = "1",

pages = "312",

booktitle = "IFCS 2014 - 2014 IEEE International Frequency Control Symposium, Proceedings",

publisher = "IEEE, Institute of Electrical and Electronics Engineers",

address = "United States",

note = "Ultra-high stability cryocooled sapphire microwave oscillators ; Conference date: 01-01-2014",

}

Hilton, A, Hartnett, JG, Ivanov, E & Luiten, A 2014, Ultra-high stability cryocooled sapphire microwave oscillators. in IFCS 2014 - 2014 IEEE International Frequency Control Symposium, Proceedings. vol. 1, IEEE, Institute of Electrical and Electronics Engineers, Piscataway, NJ, USA, pp. 312, Ultra-high stability cryocooled sapphire microwave oscillators, 1/01/14. https://doi.org/10.1109/FCS.2014.6859925

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AU - Hilton, Ashby

AU - Hartnett, J.G.

AU - Ivanov, Eugene

AU - Luiten, Andre

PY - 2014

Y1 - 2014

N2 - Two nominally identical microwave cryocooled sapphire oscillators (CSO) have been implemented at the University of Adelaide. The sapphire resonators have a turning point in their frequency-temperature dependence at approximately 6 K, which delivers first-order insensitivity to temperature fluctuations when operated at this point. Using a closed system ultra-low vibration pulse-tube cryocooler with a specially design cryostat [1], it is possible to control the rms temperature fluctuations at the resonator to the 10 μK level, while maintaining a low vibration environment. Combined with a loaded Q-factor of about 109, similar oscillators have shown an Allan deviation of fractional frequency fluctuations of σy = 5.8×10 -16 at 1 s [2]. © 2014 IEEE.

AB - Two nominally identical microwave cryocooled sapphire oscillators (CSO) have been implemented at the University of Adelaide. The sapphire resonators have a turning point in their frequency-temperature dependence at approximately 6 K, which delivers first-order insensitivity to temperature fluctuations when operated at this point. Using a closed system ultra-low vibration pulse-tube cryocooler with a specially design cryostat [1], it is possible to control the rms temperature fluctuations at the resonator to the 10 μK level, while maintaining a low vibration environment. Combined with a loaded Q-factor of about 109, similar oscillators have shown an Allan deviation of fractional frequency fluctuations of σy = 5.8×10 -16 at 1 s [2]. © 2014 IEEE.

U2 - 10.1109/FCS.2014.6859925

DO - 10.1109/FCS.2014.6859925

M3 - Conference paper

SN - 9781479949168

VL - 1

SP - 312

BT - IFCS 2014 - 2014 IEEE International Frequency Control Symposium, Proceedings

PB - IEEE, Institute of Electrical and Electronics Engineers

CY - Piscataway, NJ, USA

T2 - Ultra-high stability cryocooled sapphire microwave oscillators

Y2 - 1 January 2014

ER -

Ultra-high stability cryocooled sapphire microwave oscillators

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