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Proceedings Paper

The ALMA photonic local oscillator system
Author(s): Bill Shillue; Wes Grammer; Christophe Jacques; Rodrigo Brito; Jack Meadows; Jason Castro; Yoshihiro Masui; Robert Treacy; Jean-François Cliche
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Paper Abstract

The Atacama Large Millimeter Array (ALMA) Photonic Local Oscillator (PLO) is an advanced photonics system that generates and distributes all of the Local Oscillator (LO) and timing references for the ALMA radio telescope array. These LO and timing references are used by the receivers and electronics at the antennas, and by the Correlator in the central building. Due to the unprecedented combination of high sky frequencies (up to 950 GHz) and long baseline lengths of up to 15 kilometers, the ALMA 1st LO requirement is particularly stringent, with extremely precise timing and synchronization needed down to the ~10 femtosecond level.

Paper Details

Date Published: 24 September 2012
PDF: 6 pages
Proc. SPIE 8452, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI, 845216 (24 September 2012); doi: 10.1117/12.927174
Show Author Affiliations
Bill Shillue, National Radio Astronomy Observatory (United States)
Wes Grammer, National Radio Astronomy Observatory (United States)
Christophe Jacques, National Radio Astronomy Observatory (United States)
Rodrigo Brito, ALMA Observatory (Chile)
Jack Meadows, National Radio Astronomy Observatory (United States)
Jason Castro, National Radio Astronomy Observatory (United States)
Yoshihiro Masui, Fujitsu TEN, Ltd. (United States)
Robert Treacy, National Radio Astronomy Observatory (United States)
Jean-François Cliche, TeraXion Inc. (Canada)


Published in SPIE Proceedings Vol. 8452:
Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI
Wayne S. Holland, Editor(s)

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