首页|Coherent optical frequency transfer via 972-km fiber link

Coherent optical frequency transfer via 972-km fiber link

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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.

optical frequency transferfiber linkphase noise cancellation

邓雪、张翔、臧琦、焦东东、王丹、刘杰、高静、许冠军、董瑞芳、刘涛、张首刚

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National Time Service Centre,Chinese Academy of Sciences,Xi'an 710600,China

Key Laboratory of Time Reference and Application,Chinese Academy of Sciences,Xi'an 710600,China

School of Communications and Information Engineering and School of Artificial Intelligence,Xi'an University of Posts and Telecommunications,Xi'an 710121,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaFund from the Xi'an Science and Technology Bureau,ChinaFund from the Youth Innovation Promotion Association of the Chinese Academy of Sciences

12103059120330071230307712303076E019XK1S041188000XGJ

2024

10.1088/1674-1056/ad0629

中国物理B(英文版)
中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI
影响因子：0.995
ISSN：1674-1056
年,卷(期)：2024.33(2)
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