| Cryogenic sapphire oscillator using a low-vibration design pulse-tube cryocooler: first results. | |
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MedLine Citation:
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PMID: 20442014 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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A cryogenic sapphire oscillator (CSO) has been implemented at 11.2 GHz using a low-vibration design pulsetube cryocooler. Compared with a state-of-the-art liquid helium cooled CSO in the same laboratory, the square root Allan variance of their combined fractional frequency instability is sigma(y) = 1.4 x 10(-15)tau(-1/2) for integration times 1 < tau < 10 s, dominated by white frequency noise. The minimum sigmay = 5.3 x 10(-16) for the two oscillators was reached at tau = 20 s. Assuming equal contributions from both CSOs, the single oscillator phase noise S(phi) approximately -96 dB x rad(2)/Hz at 1 Hz set from the carrier. |
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Authors:
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John Hartnett; Nitin Nand; Chao Wang; Jean-Michel Floch |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: IEEE transactions on ultrasonics, ferroelectrics, and frequency control Volume: 57 ISSN: 1525-8955 ISO Abbreviation: IEEE Trans Ultrason Ferroelectr Freq Control Publication Date: 2010 May |
Date Detail:
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Created Date: 2010-05-05 Completed Date: 2010-08-11 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9882735 Medline TA: IEEE Trans Ultrason Ferroelectr Freq Control Country: United States |
Other Details:
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Languages: eng Pagination: 1034-8 Citation Subset: - |
Affiliation:
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Schoolof Physics, University of Western Australia, Crawley, W.A., Australia. john@physics.uwa.edu.au |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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