Sub-picosecond timing fluctuation suppression in laser-based atmospheric transfer of microwave signal using electronic phase compensation
We demonstrated a timing fluctuation suppression in outdoor laser-based atmospheric radio-frequency transfer over a 110 m one-way free-space link using an electronic phase compensation technique. Timing fluctuations and Allan Deviation are both measured to characterize the instability of transferred...
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Published in | Optics communications Vol. 401; pp. 18 - 22 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier B.V
15.10.2017
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Subjects | |
Online Access | Get full text |
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Summary: | We demonstrated a timing fluctuation suppression in outdoor laser-based atmospheric radio-frequency transfer over a 110 m one-way free-space link using an electronic phase compensation technique. Timing fluctuations and Allan Deviation are both measured to characterize the instability of transferred frequency incurred during the transfer process. With transferring a 1 GHz microwave signal over a timing fluctuation suppressed transmission link, the total root-mean-square (rms) timing fluctuation was measured to be 920 femtoseconds in 5000 s, with fractional frequency instability on the order of 1×10−12 at 1 s, and order of 2×10−16 at 1000 s. This atmospheric frequency transfer scheme with the timing fluctuation suppression technique can be used to fast build an atomic clock-based frequency free-space transmission link since its stability is superior to a commercial Cs and Rb clock.
•Timing fluctuation suppression in atmospheric frequency transfer is proposed.•The mechanism relies on the compensation of the phase drift introduced by turbulence.•The round-trip reflected laser beam is used to measure one-way timing fluctuation.•Electronic phase shifter has a fast compensation speed and wide scale of adjustment. |
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ISSN: | 0030-4018 1873-0310 |
DOI: | 10.1016/j.optcom.2017.05.029 |