Title :
Atacama Large Millimeter Array photonic local oscillator: femtosecond-level synchronization for radio astronomy
Author_Institution :
Photonic LO Group, Nat. Radio Astron. Obs., Charlottesville, VA, USA
Abstract :
The ALMA Photonic LO system consists of a unique combination of a widely tunable and low-phase-noise millimeter-wave LO reference transmission, combined with a precise round-trip phase correction system based on an optical interferometer. The first installation of the system is now in place and supporting the initial phase of scientific commissioning of the telescope.
Keywords :
light interferometers; millimetre wave oscillators; radioastronomy; radiowave interferometers; Atacama large millimeter array photonic local oscillator; femtosecond-level synchronization; low phase noise millimeter wave LO reference transmission; optical interferometer; radioastronomy; round-trip phase correction system; Antennas; Laser tuning; Optical fiber amplifiers; Optical fiber dispersion; Optical fiber polarization; Photonics; Synthesizers;
Conference_Titel :
Frequency Control Symposium (FCS), 2010 IEEE International
Conference_Location :
Newport Beach, CA
Print_ISBN :
978-1-4244-6399-2
DOI :
10.1109/FREQ.2010.5556263
