Abstract

We present a stabilized microwave-frequency transfer technique that is based on optical phase sensing and optical phase actuation. This technique shares several attributes with optical-frequency transfer and, therefore, exhibits several advantages over other microwave-frequency transfer techniques. We demonstrated the stabilized transfer of an 8000 MHz microwave-frequency signal over a 166 km metropolitan optical fiber network, achieving a fractional frequency stability of 6.8×1014  Hz/Hz at 1 s integration and 5.0×1016  Hz/Hz at 1.6×104  s. This technique is being considered for use on the Square Kilometre Array SKA1-mid radio telescope.

© 2017 Optical Society of America

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