Title :
Fiber length stabilization system for long-baseline phased-array radio telescopes (ALMA)
Author :
Musha, Mitsuru ; Nakagawa, Ken Ichi ; Ueda, Ken-ichi ; Ishiguro, Masato ; Ueda, Akitoshi
Author_Institution :
Inst. for laser Sci., Univ. of electro-Commun., Chofu
Abstract :
Wepsilave developed local oscillator dissemination system for ALMA. The high-purity 120 GHz local oscillator was delivered as a heterodyne beat signal over 25 km through length corrected optical fibers with phase fluctuation of 10-2 radian.
Keywords :
antenna phased arrays; fluctuations; heterodyne detection; millimetre wave antenna arrays; millimetre wave oscillators; optical fibre testing; optical information processing; optical signal detection; radiotelescopes; distance 25 km; fiber length stabilization system; frequency 120 GHz; heterodyne beat signal; length corrected optical fibers; local oscillator dissemination system; long-baseline phased-array radio telescopes; phase fluctuation; Fiber lasers; Fluctuations; Frequency; Light sources; Local oscillators; Optical fibers; Optical interferometry; Phase noise; Radio astronomy; Telescopes; (060.2300) fiber measurement; (060.2360) fiber optics links and subsystems;
Conference_Titel :
Lasers and Electro-Optics, 2008 and 2008 Conference on Quantum Electronics and Laser Science. CLEO/QELS 2008. Conference on
Conference_Location :
San Jose, CA
Print_ISBN :
978-1-55752-859-9
