All polarization-maintaining Er:fiber-based optical frequency comb for frequency comparison of optical clocks

2021 ◽  
Author(s):  
Zhang Pan ◽  
Zhang Yan-Yan ◽  
Li Ming-Kun ◽  
Rao Bing-Jie ◽  
Yan Lu-Lu ◽  
...  

Abstract In this research, we demonstrate an optical frequency comb (OFC) based on a turnkey mode-locked laser with a figure-9 structure and polarization-maintaining fibers for frequency comparison between optical clocks with wavelengths of 698 nm, 729 nm, 1068 nm and 1156 nm. We adopt a multi-branch approach in order to produce high power OFC signals at these specific wavelengths, enabling the signal-to-noise ratio of the beatnotes between the OFC and the clock lasers beyond 30 dB at a resolution bandwidth of 300 kHz. This approach makes the supercontinuum spectra generating process much easier in comparison to a single branch OFC; however, more out-of-loop fibers degrade the long term frequency instability due to thermal drift. To minimize the thermal drift effect, we set the fiber lengths of different branches to be similar, and we stabilize the temperature as well. The out-of-loop frequency instability of the OFC due to the incoherence of the multi-branch is about 5.5×10-19 @ 4000 s, while the in-loop frequency instability of f ceo and that of f beat are 7.5×10-18 @1 s and 8.5×10-18 @1 s, respectively. The turnkey OFC meets the requirement of frequency comparison between the best optical clocks.

2015 ◽  
Vol 13 (1) ◽  
pp. 010605-10610 ◽  
Author(s):  
Jianrui Li Jianrui Li ◽  
Jiachuan Lin Jiachuan Lin ◽  
Xiaoguang Zhang Xiaoguang Zhang ◽  
Lixia Xi Lixia Xi ◽  
Xianfeng Tang Xianfeng Tang ◽  
...  

2021 ◽  
Author(s):  
Peng Peng Zhou ◽  
Wei Sun ◽  
Shiyong Liang ◽  
Shaolong Chen ◽  
Zhiqiang Zhou ◽  
...  

2015 ◽  
Vol 24 (6) ◽  
pp. 064209 ◽  
Author(s):  
Yan-Yan Zhang ◽  
Lu-Lu Yan ◽  
Wen-Yu Zhao ◽  
Sen Meng ◽  
Song-Tao Fan ◽  
...  

2021 ◽  
Vol 19 (12) ◽  
pp. 121405
Author(s):  
Guang Yang ◽  
Haosen Shi ◽  
Yuan Yao ◽  
Hongfu Yu ◽  
Yanyi Jiang ◽  
...  

2016 ◽  
Vol 55 (24) ◽  
pp. 6747 ◽  
Author(s):  
Cheng Ci ◽  
Xuesong Zhang ◽  
Xinran Li ◽  
Xing Chen ◽  
Yifan Cui ◽  
...  

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