Page 45 - Market Analysis Report of Optical Communications Field in China & Global market 2018

process, in which we could obtained a 150， high temperature resistant between conventional islands, ultra-low loss ULL-G.652 ocean fiber-
acrylic fiber with different modulus of organic silica gel of the inner optical is needed for transoceanic or intercontinental submarine optical
and outer coatings. Also, the fiber could be used for a long time in cables.
the environment of 200， due to its high strength, corrosion resistance,
fatigue resistance, etc. If the polyimide PI is selected, the fiber can be At present, the core layer refractive index of the widely used conventional
used in the environment of 300， for a long time. There also is another G.652 fiber-optical is increased by doping Ge in the core layer. As the
choice that to obtain a higher temperature-resistant fiber, considering a GeO2 and other metal oxides doped in core layer, not only the Rayleigh
metal-coated fiber. The metal is coated on the surface of the bare fiber scattering loss is increased but also the stability of fiber-optical under
by electroplating, electroless plating, sputtering film method, and melt hydrogen and Y ray radiation conditions is destroyed. The attenuation
coating method, in this way, the obtained fiber could be used in high of such Ge doped fiber-optical cannot be further reduced after it is
temperature oil well detection, ship heavy industry and aerospace. reduced to 0.18dB/km. However, the pure silicon core single-mode fiber-
optical reduces the attenuation caused by Rayleigh scattering due to no
2.3 New fiber for 5G big data doping in fiber-optical core layer, and then the fiber-optical attenuation
With the arrival of the 5G big data era, the flow demand is exploding. is further reduced. In order to ensure the difference of refractive index
Due to the rapid growth of backbone network traffic, 5G needs between cladding layer and core layer, it is necessary to reduce the
backbone fiber to support long-distance and large-capacity transmission. refractive index of cladding layer by doping an element such as fluorine
To meet the needs of long-distance and large-capacity 5G fiber-optic in it. The refractive index distribution of the erbium-doped core fiber
communication systems, the 400G backbone network uses ultra-low and the pure SiO2 core fiber is shown in Figure 1.
loss and large effective area ULL-G.654.E fiber to become the main fiber
for the next generation backbone network construction, at 400G or The ultra-low loss ULL-G.652.D ocean fiber-optical adopts pure quartz
higher. In the communication system, the main factors restricting the core layer technology, which has ultra-low loss characteristics in a wide
communication distance are the signal-to-noise ratio deterioration and band, achieving the attenuation of 1550 nm less than 0.165 dB/km
the fiber nonlinear effect. The traditional G.652 fiber is difficult to meet along with the bending standard of G.657.A1, ensuring Long-distance
the long-distance transmission demand. Eventually, the new ultra-low transmission across the ocean. Moreover, it has greatly improved its
loss large effective area fiber ULL-G.654.E has become the main choice strength and mechanical operability through advanced preparation
for the ultra-high-speed backbone transmission network of the new era. technology, and is widely used in marine communications and
submarine observation networks.
The ULL-G.654.E fiber is a new type of fiber designed for long-distance
transmission of land high-speed systems. It helps to improve the optical
signal-to-noise ratio of the system and extend the transmission distance
of high-speed systems. The fibers occupies greater advantage than
the 400G or 400G more in application of high-level communication
system. Especially, the ultra-low attenuation ensures the long-distance
transmission distance of the optical fiber; the large effective area ensures
that the optical fiber reduces the nonlinear effect of the transmission
system at a higher input power. Currently, the major optical fibers at
home and abroad The company is actively developing ULL-G.654.E
fiber, from 4G to 5G, and to the internet of everything, the future optical
transmission system will exceed 400G or higher level, and ULL-G.654.
E new fiber is the optimal choice to meets these demand. The
development of ULL-G.654.E fiber provides strong support for 400G, 1T
and higher speed optical transmission in the future, and promotes the Figure 1 Comparison of refractive index between ordinary fiber and
rapid upgrade of fiber backbone. pure silicon core fiber

2.4 New fiber-optical for ocean communication and monitoring 3 Conclusion
According to statistics, more than 97% of the global international data With the rapid development of mobile communication, the era of
traffic is transmitted through submarine cable systems in the field of the 5th-generation mobile communication network 5G has arrived,
marine communications and monitoring. Therefore, the construction As the carrier of mobile communication network, fiber plays an
of the global submarine optical cable is constantly accelerating. With increasingly important role,To meet the increasing demand for 5G
the rapid development of ocean communications and detection, a single mobile communications, Research and development of new optical fiber
mode fiber-optical with lower loss and larger capacity is urgently needed for 5G applications in different applications,which will promote the
to fill the domestic gap. Although the existing new fibers produced by development of 5G mobile communication network toward high speed,
fiber-optical plants in China have been able to meet the communication low delay and large capacity.

continuing from page 43
With the integration of high-performance PCVD fiber preform As optical fiber technology is gaining momentum, special fiber
processing with MCVD fiber preform processing in vapor preform not only contributes to super-capacity communication,
deposition, FiberHome Telecommunication develops 10/130, high-performance optical fiber sensing technology and fiber
20/130, 30/250, 20/400 and other series of double-clad ytterbium- laser technology, but also plays a big part in terms of smart grid,
doped optical fibers, as well as 100/140, 200/220, 400/440, 600/660, driverless cars, intelligent navigation, intelligent detection, laser
800/880 and other series of power-transmitting optical fibers. Its lighting, hyperfine processing, and etc. In this way, intelligence
products are widely used in multiple optical fiber laser companies can be interacted with information and gives wings of optical
in China, which breaks up the monopoly of foreign companies and technology to the intelligent development so as to fly high above
achieves leading applications in the segment market. the sea of high technology.

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