Long-distance telecom-fiber transfer of a radio-frequency reference for radio astronomy

Yabai He, Kenneth G.H. Baldwin, Brian J. Orr, R. Bruce Warrington, Michael J. Wouters, Andre N. Luiten, Peter Mirtschin, Tasso Tzioumis, Chris Phillips, Jamie Stevens, Brett Lennon, Scott Munting, Guido Aben, Thomas Newlands, Tim Rayner

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Very-long-baseline interferometry (VLBI) for high-resolution astronomical imaging requires phase-stable frequency references at widely separated radio-telescope antennas. For the first time to our knowledge, we have disseminated a suitable radio-frequency (RF) reference for VLBI over a “real-world” telecom optical-fiber link between radio telescopes that are >100 km apart, by means of an innovative phase-conjugation technique. Bidirectional optical amplification is used in parallel with live traffic, and phase perturbations in the effective optical-fiber path length are compensated. This RF-over-fiber approach obviates the need for separate hydrogen masers at each antenna, offering significant advantages for radio-astronomy facilities such as the Square Kilometer Array.

LanguageEnglish
Pages138-146
Number of pages9
JournalOptica
Volume5
Issue number2
DOIs
Publication statusPublished - 20 Feb 2018

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Radio astronomy
Radio telescopes
radio astronomy
radio telescopes
Interferometry
Optical fibers
radio frequencies
interferometry
antennas
optical fibers
Hydrogen masers
hydrogen masers
Antennas
fibers
Fibers
phase conjugation
traffic
Amplification
Imaging techniques
perturbation

Cite this

He, Y., Baldwin, K. G. H., Orr, B. J., Warrington, R. B., Wouters, M. J., Luiten, A. N., ... Rayner, T. (2018). Long-distance telecom-fiber transfer of a radio-frequency reference for radio astronomy. Optica, 5(2), 138-146. https://doi.org/10.1364/OPTICA.5.000138
He, Yabai ; Baldwin, Kenneth G.H. ; Orr, Brian J. ; Warrington, R. Bruce ; Wouters, Michael J. ; Luiten, Andre N. ; Mirtschin, Peter ; Tzioumis, Tasso ; Phillips, Chris ; Stevens, Jamie ; Lennon, Brett ; Munting, Scott ; Aben, Guido ; Newlands, Thomas ; Rayner, Tim. / Long-distance telecom-fiber transfer of a radio-frequency reference for radio astronomy. In: Optica. 2018 ; Vol. 5, No. 2. pp. 138-146.
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He, Y, Baldwin, KGH, Orr, BJ, Warrington, RB, Wouters, MJ, Luiten, AN, Mirtschin, P, Tzioumis, T, Phillips, C, Stevens, J, Lennon, B, Munting, S, Aben, G, Newlands, T & Rayner, T 2018, 'Long-distance telecom-fiber transfer of a radio-frequency reference for radio astronomy', Optica, vol. 5, no. 2, pp. 138-146. https://doi.org/10.1364/OPTICA.5.000138

Long-distance telecom-fiber transfer of a radio-frequency reference for radio astronomy. / He, Yabai; Baldwin, Kenneth G.H.; Orr, Brian J.; Warrington, R. Bruce; Wouters, Michael J.; Luiten, Andre N.; Mirtschin, Peter; Tzioumis, Tasso; Phillips, Chris; Stevens, Jamie; Lennon, Brett; Munting, Scott; Aben, Guido; Newlands, Thomas; Rayner, Tim.

In: Optica, Vol. 5, No. 2, 20.02.2018, p. 138-146.

Research output: Contribution to journalArticleResearchpeer-review

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