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Optical Fiber Technique for Remote Stabilization of RF Phase

✍ Scribed by Peter A. Krug; Michael I. Large; Ralph G. Davison

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
168 KB
Volume
5
Category
Article
ISSN
1068-5200

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✦ Synopsis

We demonstrate an optical-fiber-based technique to deliver a radiofrequency reference phase to a remote location. Using a reflected portion of the RF amplitude-modulated optical signal from the remote location in a feedback loop, we show that the remote phase can be kept within "0.3Њ of the desired value, independent of temperature variations along a fiber length of 2 km or more. The instrument is designed to operate at 416 MHz, and works satisfactorily over a "10% RF bandwidth. In addition, an automatic phase ranging circuit allows the device to maintain phase stabilization over an infinite number of phase cycles. The system is presently being installed at the Molonglo Observatory Synthesis Telescope near Canberra, Australia.

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