Theoretical and experimental study on ultra-long unrepeated optical fiber link based on bidirectional Raman amplifier

2020 ◽  
Vol 34 (23) ◽  
pp. 2050244
Author(s):  
Ronghua Chi ◽  
Tao Lu ◽  
Xiaohan Sun
Keyword(s):  
Optical Fiber ◽  
Signal Transmission ◽  
Power Budget ◽  
Long Distance ◽  
Theoretical Simulation ◽  
Raman Amplifier ◽  
Transmission Link ◽  
Fiber Link ◽  
Power Evolution ◽  
Good Agreement

In this paper, an ultra-long distance transmission fiber link based on bidirectional Raman amplifier is studied by theoretical simulation and experimental verification. The power evolution of pump and WDM signals in optical fiber in 355 km transmission link is simulated theoretically. The performance of the ultra-long distance system based on co-pump/counter-pump/bidirectional-pump Raman amplifier (CORA/CTRA/BiRA) are simulated. And the power budget is also predicted by simulation. The performance of 10*100 Gb/s signal transmission in 355 km fiber link based on bidirectional Raman amplifier are tested experimentally. The theoretical and experimental results are in good agreement.

scholarly journals Long-Distance Time Transfer in Optical Fiber Networks Using a Cascaded Taming Technology

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Ding Chen ◽  
Jiangning Xu ◽  
Yifeng Liang ◽  
Shan Jiang ◽  
Hongyang He
Keyword(s):  
Optical Fiber ◽  
High Precision ◽  
Wavelength Division Multiplexing ◽  
Time Synchronization ◽  
Atomic Clock ◽  
Process Time ◽  
Long Distance ◽  
Time Service ◽  
Time Frequency ◽  
Fiber Link

In order to meet the time service needs of high-precision, long-distance, and multinode optical network, this paper proposes a new time synchronization solution, which combines the wavelength division multiplexing (WDM) technology with cascaded taming clock technology. The WDM technology is used for time synchronization between each pair of master-slave nodes. In the system, there are two wavelengths on the fiber link between the master node and the slave node for transmitting signals. 1 plus per second (PPS) signal, time code signal, and 10 MHz signal are, respectively, and successively, sent to the optical fiber link. By solving the one-way delay through analysis of error contribution and link characteristics of the time transmission process, time synchronization of the master-slave nodes pair is achieved. Furthermore, the authors adopt cascaded taming clock technology to ensure accurate time synchronization of each node. A 700 km long-distance time-frequency synchronization system is constructed in the laboratory. The system uses a cesium atomic clock as the reference clock source and transmits the signals through 8 small rubidium atomic clocks (RB clocks) hierarchically. Results from the experiment show that the long-term time stability is 47.5 ps/104 s. The system’s structural characteristics and the experiment results meet the requirements to allow practical use of high-precision time synchronization in networks. This proposed solution can be applied in various civil, commercial, and military fields.

Phase Stabilized Radio Frequency Signal Transmission via Optical Fiber Link

CLEO: 2015 ◽  
2015 ◽  
Author(s):  
Anxu Zhang ◽  
Feifei Yin ◽  
Yitang Dai ◽  
Jianqiang Li ◽  
Kun Xu
Keyword(s):  
Optical Fiber ◽  
Radio Frequency ◽  
Signal Transmission ◽  
Frequency Signal ◽  
Radio Frequency Signal ◽  
Fiber Link

Vibration sensor for the health monitoring of the large rotating machinery: review and outlook

Sensor Review ◽  
2018 ◽  
Vol 38 (1) ◽  
pp. 44-64 ◽  
Author(s):  
Shaoyi Xu ◽  
Fangfang Xing ◽  
Ruilin Wang ◽  
Wei Li ◽  
Yuqiao Wang ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Health Monitoring ◽  
Electromagnetic Interference ◽  
Signal Transmission ◽  
Rotating Machinery ◽  
Vibration Sensor ◽  
Future Research ◽  
Long Distance ◽  
Content Type ◽  
Advantages And Disadvantages

Purpose At present, one of the key equipment in pillar industries is a large rotating machinery. Conducting regular health monitoring is important for ensuring safe operation of the large rotating machinery. Because vibrations sensors play an important role in the workings of the rotating machinery, measuring its vibration signal is an important task in health monitoring. This paper aims to present these. Design/methodology/approach In this work, the contact vibration sensor and the non-contact vibration sensor have been discussed. These sensors consist of two types: the electric vibration sensor and the optical fiber vibration sensor. Their applications in the large rotating machinery for the purpose of health monitoring are summarized, and their advantages and disadvantages are also presented. Findings Compared with the electric vibration sensor, the optical fiber vibration sensor of large rotating machinery has unique advantages in health monitoring, such as provision of immunity against electromagnetic interference, requirement of less insulation and provision of long-distance signal transmission. Originality/value Both contact vibration sensor and non-contact vibration sensor have been discussed. Among them, the electric vibration sensor and the optical fiber vibration sensor are compared. Future research direction of the vibration sensors is presented.

scholarly journals First international comparison of fountain primary frequency standards via a long distance optical fiber link

Metrologia ◽  
2017 ◽  
Vol 54 (3) ◽  
pp. 348-354 ◽  
Author(s):  
J Guéna ◽  
S Weyers ◽  
M Abgrall ◽  
C Grebing ◽  
V Gerginov ◽  
...  
Keyword(s):  
Optical Fiber ◽  
International Comparison ◽  
Long Distance ◽  
Frequency Standards ◽  
Fiber Link ◽  
Primary Frequency

High speed optical switching gain based EDFA model with 30 Gb/s NRZ modulation code in optical systems

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Mahmoud M. A. Eid ◽  
Ahmed Nabih Zaki Rashed ◽  
Keyword(s):  
Optical Fiber ◽  
High Speed ◽  
Optical Switching ◽  
Fiber Amplifier ◽  
Optical Systems ◽  
Power Budget ◽  
Erbium Doped Fiber Amplifier ◽  
Amplifier Model ◽  
Modulation Rate ◽  
Modulation Code

AbstractThis study presents high speed optical switching gain based Erbium doped fiber amplifier model. By using the proposed model the optical fiber loss can be minimized. The system is stabilized with the power budget of 25.875 mW a long 75 km as a length of optical fiber in this study can be verified. The modulation rate of 10 Gb/s can be upgrade up to reach 30 Gb/s. The suitable power for the optical transmitter is −2.440 dBm and NRZ modulation code is verified. The receiver sensitivity can be upgraded with the minimum bit error rate and max Q factor are 1.806 e−009 and 5.899.

Analysis of graded-index polymer optical fiber link performance under fiber bending

2005 ◽  
Vol 23 (6) ◽  
pp. 2062-2072 ◽  
Author(s):  
K. Makino ◽  
T. Nakamura ◽  
T. Ishigure ◽  
Y. Koike
Keyword(s):  
Optical Fiber ◽  
Polymer Optical Fiber ◽  
Graded Index ◽  
Link Performance ◽  
Fiber Link

scholarly journals Full Optical Fiber Link Characterization With the BSS-Lasso

2019 ◽  
Vol 68 (10) ◽  
pp. 4162-4174 ◽  
Author(s):  
Raphael Saavedra ◽  
Pedro Tovar ◽  
Gustavo C. Amaral ◽  
Bruno Fanzeres
Keyword(s):  
Optical Fiber ◽  
Fiber Link
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