Femtosecond atmospheric frequency transfer using diode laser with electronic phase compensation

2017 ◽  
Author(s):  
Shijun Chen ◽  
Dawei Chen ◽  
Qiang Chen ◽  
Fuyu Sun ◽  
Jianguo Hu ◽  
...  
Keyword(s):  
Diode Laser ◽  
Phase Compensation ◽  
Electronic Phase ◽  
Frequency Transfer

Microwave frequency transfer over a 112-km urban fiber link based on electronic phase compensation

2020 ◽  
Vol 29 (6) ◽  
pp. 064209
Author(s):  
Wen-Xiang Xue ◽  
Wen-Yu Zhao ◽  
Hong-Lei Quan ◽  
Cui-Chen Zhao ◽  
Yan Xing ◽  
...  
Keyword(s):  
Microwave Frequency ◽  
Phase Compensation ◽  
Electronic Phase ◽  
Fiber Link ◽  
Frequency Transfer

Highly-stable laser-based underwater radio-frequency transfer with electronic phase compensation

2019 ◽  
Vol 452 ◽  
pp. 247-251 ◽  
Author(s):  
Dong Hou ◽  
Qingsong Bai ◽  
Guangkun Guo ◽  
Danian Zhang ◽  
Fuyu Sun
Keyword(s):  
Radio Frequency ◽  
Phase Compensation ◽  
Electronic Phase ◽  
Frequency Transfer ◽  
Stable Laser

Highly stable multiple-access underwater frequency transfer with terminal phase compensation

2021 ◽  
Vol 46 (19) ◽  
pp. 4745
Author(s):  
Junwei Ren ◽  
Dong Hou ◽  
Yefeng Gao ◽  
Guangkun Guo ◽  
Ke Liu
Keyword(s):  
Multiple Access ◽  
Terminal Phase ◽  
Phase Compensation ◽  
Frequency Transfer

scholarly journals Cascaded Microwave Frequency Transfer over 300-km Fiber Link with Instability at the 10−18 Level

2021 ◽  
Vol 13 (11) ◽  
pp. 2182
Author(s):  
Wenxiang Xue ◽  
Wenyu Zhao ◽  
Honglei Quan ◽  
Yan Xing ◽  
Shougang Zhang
Keyword(s):  
Cold Atom ◽  
Microwave Frequency ◽  
Propagation Delay ◽  
Noise Power ◽  
Noise Power Spectral Density ◽  
Frequency Standards ◽  
Power Spectral ◽  
Electronic Phase ◽  
Frequency Transfer ◽  
Cascaded System

Comparing and synchronizing atomic clocks between distant laboratories with ultra-stable frequency transfer are essential procedures in many fields of fundamental and applied science. Existing conventional methods for frequency transfer based on satellite links, however, are insufficient for the requirements of many applications. In order to achieve high-precision microwave frequency transfer over a thousand kilometers of fiber and to construct a fiber-based microwave transfer network, we propose a cascaded system for microwave frequency transfer consisting of three 100-km single-span spooled fiber links using an improved electronic phase compensation scheme. The transfer instability measured for the microwave signal reaches 1.1 × 10−14 at 1 s and 6.8 × 10−18 at 105 s, which agrees with the root-sum-square of each span contribution. It is feasible to extend the length of the fiber-based microwave frequency transfer up to 1200 km using 4 stages of our cascaded system, which is still sufficient to transfer modern cold atom microwave frequency standards. Moreover, the transfer instability of 9.0 × 10−15 at 1 s and 9.0 × 10−18 at 105 s for a 100-MHz signal is achieved. The residual phase noise power spectral density of the 300-km cascaded link measured at 100-MHz is also obtained. The rejection frequency bandwidth of the cascaded link is limited by the propagation delay of one single-span link.

Laser-based Frequency Transfer over Underwater Link with Phase Compensation

2019 ◽  
Author(s):  
Guangkun Guo ◽  
Jiyuan Chen ◽  
Danian Zhang ◽  
Ke Liu ◽  
Fuyu Sun ◽  
...  
Keyword(s):  
Phase Compensation ◽  
Frequency Transfer
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