Page 38 - Analysis Report of Global Market in the Submarine Cable Field (2017)

Wire and Cable

All four sea trial systems were deployed and recovered successfully, with
good cable handling characteristics and all measured cable parameters
within specifications. The cable electrical and optical test values
remained stable throughout the trials, with some improvement in values
when the cable systems were deployed on the sea bed (due to lower
seabed temperature).

Some valuable lessons can be learned from the timeline of the 30-day
duration sea trial as summarized in the following Table
Item Activity Duration %
Vessel Mobilisation, Cable System Loading /
1 Unloading, Test Equipment, Branching Unit, Jointing 4 days 13.3 %
Kits, various cable gear, personnel HORC telecom cable products robust structure and excellent handling
2 Transits from / to Hengtong Port to work locations 6 days 20 .0 % capabilities using an industry standard cable ship without modifications
Weather delays (mostly related to ploughing & to equipment or procedures. This activity completes the last step in
3 Branching Unit deployment) due to open exposed 7 days 23.3 % the qualification of products for the global international market, and
work location demonstratesHengtong Marine’s objective of delivering“Global Quality
4 Cable Work onsite 11 days 36.7 % from China”.
5 Cable System testing 2 days 6.7 %
Total duration 30 days 100 % Acknowledgements
The authors would like to thank HMN and SBSS for excellent co-
As with any marine operation the time analysis reveals that transits
and weather delays are the most costly non-productive periods of operation and flexibility in making this sea trial a success and creating a
time spent offshore, but this is the required penalty to prove the cable “Win–Win–Win”result for everyone involved.
system product performance in realistic conditions close to the limits of
commercial cable deployment and repair conditions. A special thanks to the Hengtong Marine Sea Trial team, comprised
of members from Production, Quality, Engineering Services, R&D
Conclusions and Fibre Manufacturing for all their efforts offshore 24/7 and also to
Hengtong Marine has succeeded in demonstrating our HOUC and Captain David Foster the Independent Marine Observer.

Large Reel Length High Strength Submarine Optical

Fiber and Its Application

2
2
1,2
1
1,2
1
Gonghui Zhang , Lin Wang , Qiushi Huang , Hairui Song , Ping Lu , Jian Yuan , Wei Chen 1,2
1 Jiangsu Hengtong Optic-electric Co., Ltd., Suzhou, China
2 Jiangsu Hengtong Optical Fiber Technology Co., Ltd., Suzhou, China
Abstract
In this paper, a high reliability marine optical fiber (SeaCom®) was developed, which is suitable for long distance and less connection submarine
transmission, through the improvement of preform manufacturing and optical fiber drawing process. Test results show that the median tensile
strength of the fiber before and after gel aging and damp heat aging is higher than 6.0GPa, the dynamic fatigue parameter is higher than 25, the
percent of standard reel length 100km under 250kPsi tension proof test reach 72.9%. The project also solved the deuterize treatment and PMD
test problems of long fiber length. The fiber (SeaCom®) has been applied in submarine optical cable, which greatly improves the reliability of long
distance submarine communication engineering.
Keywords: reel length; tensile strength; submarine optical fiber; proof tension; submarine cable
1.Introduction performance and even break on the strength weakness. In this paper, by
It is estimated that by 2018, the global internet data traffic will reach improving the preform manufacturing and optical fiber drawing process,
14GB per capita, of which the rapid growth of international traffic. the fiber tensile strength was improved and the fiber breakage rate
According to statistics, more than 97% of the world’s international data under high tension proof was reduced, make the fiber more suitable for
flow is transmitted through the submarine optical cable system, so the submarine engineering application of long distance and less connection
construction of the global submarine optical cable is also accelerating. transmission.
At present, the world has been put into use more than 230 submarine
optical cables, to achieve the connection between the six continents 2.Development and Manufacturing
except Antarctica; in addition, there are more than 10 submarine optical
cables under construction. 2.1High Strength Technology
The optical fiber can be simply considered to be composed of silica glass
However, the high cost of construction and maintenance of submarine and coating material. The main component of the optical fiber glass is
optical fiber cable put forward high requirements on the reliability high purity SiO2, and the fracture strength of common glass fiber can be
of marine optical fiber. The submarine cable will be inevitably under calculated by formula:
great tension, from the cable deadweight, water flow and laying drag. In
addition to the range of over length, the optical fiber in the submarine (1)
cable may also be affected, thus affecting its optical transmission
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