中国物理B ›› 2024, Vol. 33 ›› Issue (2): 20602-020602.doi: 10.1088/1674-1056/ad0629
Xue Deng(邓雪)1,2,3, Xiang Zhang(张翔)1,2, Qi Zang(臧琦)1,2, Dong-Dong Jiao(焦东东)1,2, Dan Wang(王丹)1,2, Jie Liu(刘杰)1,2, Jing Gao(高静)1,2, Guan-Jun Xu (许冠军)1,2,†, Rui-Fang Dong(董瑞芳)1,2,‡, Tao Liu(刘涛)1,2,§, and Shou-Gang Zhang(张首刚)1,2
Xue Deng(邓雪)1,2,3, Xiang Zhang(张翔)1,2, Qi Zang(臧琦)1,2, Dong-Dong Jiao(焦东东)1,2, Dan Wang(王丹)1,2, Jie Liu(刘杰)1,2, Jing Gao(高静)1,2, Guan-Jun Xu (许冠军)1,2,†, Rui-Fang Dong(董瑞芳)1,2,‡, Tao Liu(刘涛)1,2,§, and Shou-Gang Zhang(张首刚)1,2
摘要: We demonstrate coherent optical frequency dissemination over a distance of 972 km by cascading two spans where the phase noise is passively compensated for. Instead of employing a phase discriminator and a phase locking loop in the conventional active phase control scheme, the passive phase noise cancellation is realized by feeding double-trip beat-note frequency to the driver of the acoustic optical modulator at the local site. This passive scheme exhibits fine robustness and reliability, making it suitable for long-distance and noisy fiber links. An optical regeneration station is used in the link for signal amplification and cascaded transmission. The phase noise cancellation and transfer instability of the 972-km link is investigated, and transfer instability of 1.1×10-19 at 104 s is achieved. This work provides a promising method for realizing optical frequency distribution over thousands of kilometers by using fiber links.
中图分类号: (Time and frequency)