Optical Fiber Technique for Remote Stabilization of RF Phase |
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| Affiliation: | 1. Australian Photonics Cooperative Research Centre, Optical Fibre Technology Centre, 101 National Innovation Centre, Australian Technology Park, Eveleigh, New South Wales, 1430, Australia;2. Astrophysics Department, School of Physics, University of Sydney, Sydney, New South Wales, 2006, Australia;1. National & Local United Engineering Laboratory of Flat Panel Display Technology, Fuzhou University, Fuzhou 350002, China;2. Administration of Xiamen Area of China (Fujian) Pilot Free Trade Zone, Xiamen 361006, China;3. Science college, Jimei University, Xiamen 361021, China;1. Department of Anatomical Sciences, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran;2. Department of Biology and Anatomical Sciences, Shahid Sadoughi University of Medical Sciences, Yazd, Iran;3. Histomorphometry and Stereology Research Center, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran;4. Clinical Neurology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran;5. Department of Physiology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran;6. Psychosomatic Outpatient Clinics, Budapest, Hungary;7. Vision Research Institute, Neuroscience and Consciousness Research Department, Lowell, MA, USA;8. Institute for Quantum Science and Technology, Department of Physics and Astronomy, University of Calgary, Alberta T2N 1N4, Canada;1. School of Physics and Astronomy, University of Manchester, UK;2. Cockcroft Institute for Accelerator Science and Technology, Daresbury Science and Innovation Campus, Warrington WA4 4AD, UK;3. Paul Scherrer Institute, Villigen, Switzerland;4. Department of Physics and Astronomy, University College London, UK;5. Department of Physics, ETH Zurich, Switzerland |
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| Abstract: | We demonstrate an optical-fiber-based technique to deliver a radio-frequency 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 ± 0.3° 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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