Ultrastable Multiclock Frequency Injection and Dissemination in a Ring Fiber Network

Owing to the characteristics of ultralow loss and antielectromagnetic interference, using optical fiber to deliver time and frequency signals has been a preferred choice for high-precision clock dissemination and comparison. As a brilliant idea, one has been able to reproduce ultrastable signals from one local station to multiple users. In this paper, we take a step further and propose a concept of multiclock (in different locations) dissemination for multiterminals. By injecting frequency signals into one stabilized ring-like fiber network, the relative stabilities of 3.4 × 10−14@1 s for a master clock dissemination and 5.1 × 10−14 @1 s for a slave clock dissemination have been achieved. The proposed scheme can greatly simplify the future “N” to “N” radio-frequency dissemination network, especially in the situation of multiclock comparison.

[1]  Dan Xu.  Bidirectional erbium-doped fiber amplifiers used in joint frequency and time transfer based on wavelength-division multiplexing technology , 2019 .

[2]  Fei Yang,et al.  Bidirectional erbium-doped fiber amplifiers used in joint frequency and time transfer based on wavelength-division multiplexing technology , 2015 .

[3]  B. Wang,et al.  Square Kilometre Array Telescope—Precision Reference Frequency Synchronisation via 1f-2f Dissemination , 2015, Scientific Reports.

[4]  Fei Yang,et al.  Joint Time and Frequency Dissemination Network Over Delay-Stabilized Fiber Optic Links , 2015, IEEE Photonics Journal.

[5]  Fabio Stefani,et al.  In-line extraction of an ultra-stable frequency signal over an optical fiber link , 2014, 2014 European Frequency and Time Forum (EFTF).

[6]  Wei Zhang,et al.  An optical lattice clock with accuracy and stability at the 10−18 level , 2013, Nature.

[7]  G. Grosche.  Eavesdropping time and frequency: phase noise cancellation along a time-varying path, such as an optical fiber. , 2013, Optics letters.

[8]  P. Krehlik,et al.  Multipoint dissemination of RF frequency in fiber optic link with stabilized propagation delay , 2013, IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control.

[9]  Guido Aben,et al.  High-precision optical-frequency dissemination on branching optical-fiber networks. , 2013, Optics letters.

[10]  J. Miao,et al.  Fiber-based multiple-access ultrastable frequency dissemination. , 2012, Optics letters.

[11]  Bruce Warrington.  Two Atomic Clocks Ticking as One , 2012, Science.

[12]  T. Hänsch,et al.  A 920-Kilometer Optical Fiber Link for Frequency Metrology at the 19th Decimal Place , 2012, Science.

[13]  A. Ludlow,et al.  Making optical atomic clocks more stable with 10-16-level laser stabilization , 2011, 1101.1351.

[14]  M. Lours,et al.  High-resolution microwave frequency dissemination on an 86-km urban optical link , 2009, 0907.3500.

[15]  F. Hong,et al.  Coherent optical frequency transfer over 50-km physical distance using a 120-km-long installed telecom fiber network. , 2008, Optics express.

[16]  Paul A. Williams,et al.  High-stability transfer of an optical frequency over long fiber-optic links , 2008 .

[17]  Jun Ye,et al.  Remote transfer of ultrastable frequency references via fiber networks. , 2007, The Review of scientific instruments.

[18]  M. Weiss,et al.  Two-way time and frequency transfer using optical fibers , 1996, Proceedings of 20th Biennial Conference on Precision Electromagnetic Measurements.

[19]  L S Ma,et al.  Delivering the same optical frequency at two places: accurate cancellation of phase noise introduced by an optical fiber or other time-varying path. , 1994, Optics letters.