Submarine Fiber Optic Cable

Submarine Fiber Optic Cable

Submarine fiber optic cable is also known as submarine communication cable. It is a wire wrapped in insulating material and laid on the ocean floor. Subsea fiber optic cable is the main artery that ensures that major regional networks around the world can interoperate with each other. Currently, more than 90% of the world’s transnational data transmission is carried by submarine fiber optic cables.

All products in the ZMS family of submarine fiber optic cables are characterized by essential features such as superior mechanical reliability and industry-leading optical performance.
Our submarine fiber optic insulation solutions offer finishing steps, provide coloring and splicing options, and develop lengths. Helping submarine fiber optic cable manufacturers reduce costs and minimize footprint. Our finishing steps provide the reliability and performance required for harsh subsea environments.

Get a Free Quotation

More Submarine Optical Fiber Cable Products

The basic structure of submarine fiber optic cable is polyethylene layer, polyester resin or asphalt layer, steel strand layer, aluminum waterproof layer, polycarbonate layer, copper or aluminum tube, paraffin, alkane layer, fiber bundle, etc.

submarine fiber optic cable

Submarine Armored Fiber Optic Cable Series

Lightweight Submarine Fiber Optic Cable Series


Medium / High Voltage Submarine Fiber Optic Cable Series

Get a Free Quotation

Product Scope: Subsea, shallow sea
Fiber Count: 12 24 36 48 72 core
. Precise control of the fiber length to ensure good tensile properties and temperature characteristics of the cable.
. Cross-linked polyethylene (XLPE) or polyethylene (PE) sheath with good resistance to UV radiation.
. Good compression resistance and flexibility.
. Loose sleeves filled with special waterproof compounds.
. Double-sided chrome-plated plastic coated steel strip (PSP) to improve the moisture permeability of the fiber optic cable.
. Good water barrier material to prevent longitudinal water penetration of the cable.

GYTA33 Fiber Optic Cable Submarine/Underwater/Undersea Parameters


GYTA 33 Series Submarine Fiber Optic Cable

Compared with terrestrial fiber optic cable, deep sea fiber optic cable consists of many superior features.
1. laying does not need to dig a trench or support with brackets, thus less investment and faster construction.
2. In addition to the landing lot, most of the underwater fiber-optic cables at a certain depth of the sea floor, are not subject to wind and waves and other natural environmental damage and human production activities interference.
Therefore, the cable is safe and stable, with strong anti-interference ability and good confidentiality performance.

Fiber count







CSM/Steel wire (mm)







Element mumber







Max. cores in tube







Diameter of inner sheath







Steel wire diameter and No.







Cable diameter approx (mm)







Weight approx (kg/km)







Tensile strength (N)

Long term



Short term



Crush Resistence(N/100mm)

Long term


Short term


Bending Radius (mm)


≥30 ×Dia. Of cable


≥15×Dia. Of cable

Operating Temperature (°C)

-40°C ~+ 70°C


Directly burial and Under water

Key Characteristics Of Submarine Optical Fiber Cables

Lightweight submarine fiber optic cable (LW) is the core of other types of submarine cables in the same series. The center is a stainless steel tube structure, the outer layer is supplemented by inner armor steel wire and polyethylene layer and other protective layers, suitable for the area within 8000m water depth

Lightweight protection submarine cable (LWP) is the LW cable with a metal band and polyethylene sheath, suitable for areas up to 7000m water depth. It has the characteristics of abrasion resistance and resistance to tearing by marine animals.

Single-layer armored subsea cable (SA) is a single layer of armored steel wire outside the LW cable, suitable for buried areas within 2000m water depth, to prevent tugboat hazards

Double armored undersea cable (DA) adds another layer of armored steel wire outside the SA cable, which is suitable for burial areas with high tug hazards and high abrasion environment within 600m water depth.

Get a Free Quotation

A submarine fiber optic cable system is mainly used to connect fiber optic cable and the Internet, it consists of two major parts: onshore equipment and underwater equipment. The submarine cable is the most important and vulnerable part of the underwater equipment. The onshore equipment packages the communication services such as voice, image, and data for transmission. Underwater equipment is responsible for the processing, sending, and receiving of communication signals. Underwater equipment is divided into three parts: submarine fiber optic cable, repeater, and “branch unit”: submarine fiber optic cable is the most important and fragile part of it.
1. submarine fiber optic cable is wrapped with an insulating sheath of wire bundles laid on the seabed, seawater can prevent interference from external light and magnetic waves, so the signal-to-noise ratio of the submarine cable is high.
2. submarine fiber optic cable communication in the time delay can not be felt.
3. The design life of submarine fiber optic cable is 25 years of continuous operation, while artificial satellites generally run out of fuel in 10 to 15 years.

The Technical Principle Of The Submarine Cable System

underwater submarine cable

The network of countries in the world can be seen as a large local area network. Submarine fiber optic cable and land fiber optic cable connecting them to the internet. The fiber optic cable is the core of the Internet, and the US is almost the core brain of the Internet. As the birthplace of the internet, the United States houses many servers, and 10 of the 13 root servers that connect domain names worldwide are in the United States. When you log in to most websites or send emails, the data almost always have to go around the US to reach its destination.

The submarine cable is zoned for maintenance, and for security purposes, it usually needs to be maintained. If someone fished out the submarine cable and added it to the fiber, they could steal the information. If there is a war, someone could also destroy the fiber optic cable. The submarine cable is the best solution for communication, other methods such as satellite and microwave can be supplemented, but cannot replace the submarine cable for the time being because they have limited channels. It is a way that can allow a wide range of users to communicate in an inexpensive way.
The remote power supply of the submarine cable system is very important, and the repeaters along the submarine cable are dependent on the landing office for remote power work. Digital repeaters for submarine fiber optic cables are multi-functional and use several times more power than analog repeaters for submarine cables, and the power supply requires a high degree of reliability and cannot be interrupted. Therefore, in shark-infested areas, two layers of steel tape wrapping and another layer of polyethylene outer sheath are added to the outside of the submarine cable. Even with such tight protection, the polyethylene insulator of the deep-sea cable was found to be damaged by shark bites in the late 1980s, causing power supply failures.

The Design Requirements Of Submarine Fiber Optic Cable

World Submarine Fiber Optic Cable Distribution

The design of underwater fiber optic cable must ensure that the fiber is not affected by external forces and the environment.
The basic requirements are the ability to adapt to submarine pressure, abrasion, corrosion, biological and other environments. Have a suitable armor layer to prevent damage from fishing trawlers, anchors, and sharks.
When the ocean fiber optic cable breaks, the length of seawater infiltration into the fiber optic cable is reduced as much as possible.
Can prevent hydrogen from penetrating into the fiber optic cable from the outside and prevent hydrogen from being generated inside; has a low resistance remote power supply circuit; can withstand the tension during laying and recovery; life expectancy is generally required to be more than 25 years.

Deep-sea (depth of 1000 meters or more) submarine fiber optic cable using no wire armor structure. However, the structure of the under sea cable core and strengthening members (generally the central steel wire) must be able to protect the optical fiber to prevent the high pressure of seawater and high tension when laid and recovered. In order to prevent shark damage, should also be in the shark-infested waters of the deep-sea cable sheath spiral-wrapped around two layers of steel tape, and squeeze a layer of polyethylene outer sheath.
Shallow sea (water depth of 1000 meters or less) submarine cable core structure and deep-sea cable are the same. But shallow sea cables have a single layer or double steel wire armor. The number of armored layers and the outer diameter of the steel wire should be based on the submarine environment of the cable route, water depth, whether buried, fishing, and other circumstances.

Prospects Of ZMS Submarine Cables

The complexity of the marine environment of the submarine cable project put forward high requirements, underwater cable engineering is a recognized problem in the world, construction difficulties, high maintenance costs. And it was only a few companies in the world have the ability to lay and commission submarine high-voltage cable. The development of the submarine cable market has been greatly restricted. More issues, but more solutions to the problem. In the future, the application space of submarine cable will be broader, it is important infrastructure equipment, and is an important technical support for human beings to achieve the effective expansion of their own activity area. It transports clean ocean energy to the mainland, relieving the tension of mainland resources, and also transports mainland energy to the ocean, contributing to the development of the ocean economy.

ZMS Submarine Cable company firmly believes in this. Therefore, we strictly require ourselves. Managed with high-quality products and after-sales service, ZMS cable has a strong technical force, exquisite technology, advanced production equipment, complete testing means, and advanced enterprise management.
The submarine cable products produced by the ZMS cable factory include submarine power cables, submarine communication cables, submarine fiber optic cables, underwater cables, Internet cables in the ocean, and other products. A variety of new products have been researched and independently judged, taking into account the comprehensive factors of equipment, materials, yield, conversion efficiency, quality and cost, and the need to master the right timing for production. For the mainstream technology direction, the company has reserved for mass production and will launch differentiated products according to the characteristics of different markets.

In recent years, through independent research and development, the company has been breaking through the length and voltage level of underwater cable production and taking the lead in the development of dynamic submarine cable, towing cable, and other special submarine cables. The production of submarine cable-related products are widely used in marine scientific research and resource development and other fields, to provide assistance to the construction of China’s “Ocean Power” strategy.

    We Provide High Quality Products and The Most Professional Cable Accessories Project Solutions.

    Get Free Quote, We Will Reply You In 24 Hour.