High-accuracy coherent optical frequency transfer over a doubled 642-km fiber link

被引：160

作者：

Calonico, D. ^{[1
]}

Bertacco, E. K. ^{[1
]}

Calosso, C. E. ^{[1
]}

Clivati, C. ^{[1
]}

Costanzo, G. A. ^{[1
,2
]}

Frittelli, M. ^{[1
]}

Godone, A. ^{[1
]}

Mura, A. ^{[1
]}

Poli, N. ^{[3
,4
]}

Sutyrin, D. V. ^{[3
,4
]}

Tino, G. M. ^{[3
,4
]}

Zucco, M. E. ^{[1
]}

Levi, F. ^{[1
]}

机构：

[1] Ist Nazl Ric Metrol INRIM, Str Cacce 91, I-10135 Turin, Italy

[2] Politecn Torino, I-10129 Turin, Italy

[3] Univ Florence, LENS, Sesto Fiorentino, FI, Italy

[4] Univ Florence, Ist Nazl Fis Nucl, Sesto Fiorentino, FI, Italy

来源：

APPLIED PHYSICS B-LASERS AND OPTICS | 2014年 / 117卷 / 03期

关键词：

SYNCHRONIZATION; TIME; DISSEMINATION; DISTANCE;

D O I：

10.1007/s00340-014-5917-8

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

To significantly improve the frequency references used in radio-astronomy and the precision measurements in atomic physics, we provide frequency dissemination through a 642-km coherent optical fiber link. On the frequency transfer, we obtained a frequency instability of 3 x 10(-19) at 1,000 s in terms of Allan deviation on a 5-mHz measurement bandwidth, and an accuracy of 5 x 10(-19). The ultimate link performance has been evaluated by doubling the link to 1,284 km, demonstrating a new characterization technique based on the double round trip on a single fiber. This method is an alternative to previously demonstrated techniques for link characterization. In particular, the use of a single fiber may be beneficial to long hauls realizations in view of a continental fiber network for frequency and time metrology, as it avoids the doubling of the amplifiers, with a subsequent reduction in costs and maintenance. A detailed analysis of the results is presented, regarding the phase noise, the cycle-slips detection and removal and the instability evaluation. The observed noise power spectrum is seldom found in the literature; hence, the expression of the Allan deviation is theoretically derived and the results confirm the expectations.

引用

页码：979 / 986

页数：8

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