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The construction of submarine cables around the world is accelerating, with more than 230 submarine cables currently invested worldwide, in addition to more than 10 submarine networks
under construction.
New or upgraded submarine networks will be the way to go
.
Submarine optical fiber manufacturing needs to break through three key technologies: low loss, large capacity, high strength, and large disk length
.
Marine photoelectric transmission products and systems are the top of
the pyramid in the field of photoelectric transmission.
All countries in the world recognize that marine photoelectric transmission products and systems are a large-scale system project with high technical difficulty and wide industrial coverage, including cable products and accessories, system design and equipment, marine construction, etc.
, which have long been monopolized
by foreign countries.
The submarine cable has a long manufacturing length of a single connection; Extremely high reliability requirements and high quality risks; High water density requirements, need to resist water pressure above 3000 meters; The terrain is complex, the climate is changeable, the laying is difficult, and the factory joint production is difficult
.
Due to its own weight, the weight of repeaters and branches, etc.
, submarine optical cables inevitably bear great tensile forces
during the construction process of laying and recycling.
In extreme cases, optical fibers in submarine cables can also be affected, affecting optical transmission performance and even breaking at fiber strength
weaknesses or dissolution points.
Breakthrough in the three key technologies of marine optical fiber: low loss, large capacity, high strength, and large disk length
.
In terms of low loss and large capacity, the additional loss change of optical fiber during the temperature cycle is very small, submarine cable manufacturers generally require 0.
02dB/km, and continue to age for 30 days at 80°C high temperature, and the additional loss of optical fiber test 1550nm and 1625nm is lower than the standard
.
In terms of tensile strength and fatigue strength, optical fiber needs to have excellent strength performance and fatigue performance, and the strength performance is still good after high-temperature paste aging and high-temperature and high-humidity aging, which meets the mechanical requirements
of submarine cable manufacturing and offshore construction.
In terms of large disk length, the delivery standard disk length can greatly reduce the dissolution point of high-strength optical fiber, improve the full-disk delivery capacity of large-disk long optical fiber, and better meet the use requirements
of long-distance communication of submarine cables.
The construction of submarine cables around the world is accelerating, with more than 230 submarine cables currently invested worldwide, in addition to more than 10 submarine networks
under construction.
New or upgraded submarine networks will be the way to go
.
Submarine optical fiber manufacturing needs to break through three key technologies: low loss, large capacity, high strength, and large disk length
.
Marine photoelectric transmission products and systems are the top of
the pyramid in the field of photoelectric transmission.
All countries in the world recognize that marine photoelectric transmission products and systems are a large-scale system project with high technical difficulty and wide industrial coverage, including cable products and accessories, system design and equipment, marine construction, etc.
, which have long been monopolized
by foreign countries.
The submarine cable has a long manufacturing length of a single connection; Extremely high reliability requirements and high quality risks; High water density requirements, need to resist water pressure above 3000 meters; The terrain is complex, the climate is changeable, the laying is difficult, and the factory joint production is difficult
.
Due to its own weight, the weight of repeaters and branches, etc.
, submarine optical cables inevitably bear great tensile forces
during the construction process of laying and recycling.
In extreme cases, optical fibers in submarine cables can also be affected, affecting optical transmission performance and even breaking at fiber strength
weaknesses or dissolution points.
Breakthrough in the three key technologies of marine optical fiber: low loss, large capacity, high strength, and large disk length
.
In terms of low loss and large capacity, the additional loss change of optical fiber during the temperature cycle is very small, submarine cable manufacturers generally require 0.
02dB/km, and continue to age for 30 days at 80°C high temperature, and the additional loss of optical fiber test 1550nm and 1625nm is lower than the standard
.
In terms of tensile strength and fatigue strength, optical fiber needs to have excellent strength performance and fatigue performance, and the strength performance is still good after high-temperature paste aging and high-temperature and high-humidity aging, which meets the mechanical requirements
of submarine cable manufacturing and offshore construction.
In terms of large disk length, the delivery standard disk length can greatly reduce the dissolution point of high-strength optical fiber, improve the full-disk delivery capacity of large-disk long optical fiber, and better meet the use requirements
of long-distance communication of submarine cables.
