Underwater Fibre Optic Cable

Professional manufacturing for fibre optic cables and on-demand cable specs. Request an underwater fibre quote today.

  • Free design analysis included with every quote

  • Select from hundreds of fibre and cable materials

  • Consult with our team of fibre cable experts

260+ KM

Fibre optic cable per day


Exported countries & region


Production lines working

Underwater Fibre Optic Cable

Professional manufacturing for fibre optic cables and on-demand cable specs. Request an underwater fibre quote today.

  • Free design analysis included with every quote

  • Select from hundreds of fibre and cable materials

  • Consult with our team of fibre cable experts

260+ KM

Fibre optic cable per day


Exported countries & region


Production lines working

swa armored underwater fiber optic cable


Cable Samples



Production & Delivery


Installations for Underwater Fibre Optic Cable

The steel wire armoured underwater SWA fibre optic cable can be installed in all external environments including underwater, climbing, and direct burial.

Underwater fiber optic cable laid in rivers


fiber optic cable in moutainous aeras


direct buried fibre optic cable laying

Direct buried

Most Required Underwater Fibre Optic Cable

All underwater fibre optic cable are popular, but not every market is the same. For example, some UK customers love lszh sheath and colored sheath, so if you are planning to order them, it is best to ask our experienced consultants.

swa armored underwater fiber optic cable

SWA 48 core

underwater fibre optic cable steel wire armoured fiber cable

SWA 96 core

corrugated steel tape steel wire double armored fibre optic cable

Double Armoured

SWA armored underwater fibre cable manufacturer

SWA 36 core

subsea fibre optic cable climbing fiber cable

Unitube SWA

SWA steel wire armoured submarine fibre optic cable

2-14 core LSZH

steel wire armored SWA undersea fibre optic cable

Double Armour LSZH

custom fibre optic cables manufacturer OEM service provided HOC

Custom Service

The Best Underwater Fibre Optic Cables for You

No matter fibre optic cable or FTTH parts, at HOC, You Can Choose Freely For Your Unique Request

No matter what specifications of underwater fibre cables you want, based on our extensive experience, we can manufacture it. In particular, our production lines supports color stripe on the out sheath of the fibre cable, which makes it can be distinguished from the vast majority of fibre cables on the market.

  • 1 – 288 Core
  • OS1, OS2…
  • G.652, G.657…
  • OM2, OM3, OM4…
  • Single mode, Multimode
  • Unitube, MLT…
  • PE, PVC, LSZH…
  • Marks & Packing…

  • Tensile, Crush, Span…

  • 1km, 2km, 4km, 6km…

Cable Structures

Raw Materials



Estimated Cost-Analysis for Underwater Fibre Optic Cable

Underwater fibre optic cable cost-driving is cable span, raw materials, specifications and shipping. For the below parts, you will see the full details for the costs.

Estimated Production & Delivery Time

Depends on whether you want to do customization your fibre optic cable or not, and also depends on the speed of customs clearance and logistics, but we can guarantee to ship regular fibre optic cable in less than 2 business weeks.

HOC team in plant

Cable Specs & Custom

Confirm fibre optic cable specs and custom details with our experts. This can be all settled within an hour.

Confirm & Payment

After all details are set, make transfer of advance payment. Normally, it takes 1 day or 2 to arrive our bank account.

Production & Inspection

After payment, production will be arranged right away and we’ll keep you updated. Usually it 2-3 weeks before shipping.

Balance & Shipping

We will send you details of products and packing before shipping. All products can be delivered to port at the same day.

Advanced On-Demand Manufacturing Solutions

Whether you need a trial order to verify a cable design or mass manufacturing FTTH products, HOC has the best solution for you.

Fiber optic cable product finish and packing with drum


For retailers, we accept small orders. For example MOQ 2km for fibre optic cable.

Fiber optic cable factory production line

Price Advantage

For distributors, buy in bulk can get a better price. Save shipping and purchasing costs for you.

Optical horizontal splice closure, FTTx products

Turnkey Solution

Other than fibre cables, related fibre optic products is also there for your convenience.

Finished fiber optic cable in factory

Stock & Production

High production capacity and quick stock turnover, makes sure the most reliable supply.

Why Choose HOC?

Our quality fibre optic cables have passed the CE, ISO and other approval, and we have 19 years of experience in making fibre optic cables. Our products are eco-friendly, and they use the most advanced technology to produce.

  • Inventory Surplus

Our factory has 52 production lines dedicated to the production of fibre optic cables.

  • Great Support

The staff you interface with are experienced and certified in their English language skills.

  • Customized on Demand

You provide the design and we generally will give you a solution in a week’s time.

  • Fast Delivery

If you don’t need additional designs, just the finished product, we have the inventory to support fast delivery.

about HOC fibre optic cable manufacturers
optical fiber preform for optical fiber production

Professional team

Optical fiber drawing in drawing tower

Design on demand

Optical fibers stock waiting for coloring


optical fiber coloring

Factory direct

Fiber optic cable manufacturer cable stranding

Eco friendly

Fiber cable core and aramid yarn stranding

Certificates proven

loose tube layer stranding process

Online audit

Fiber optic cable production lines

Quick response

Finished fiber optic cable in factory

No bad review

Finished fiber optic cable packaging

100+ happy clients

hoc fiber optic cable ready for delivery and shipping

Report throughout

Optical horizontal splice closure, FTTx products

Cheap price

What Our Clients Are Saying About Us


HOC is our best fibre optic cables and equipment partner for helping us beyond expression by getting us high-quality fibre cables, at an affordable price, with incredible turnaround times. In addition, HOC helped us improve our overall fibre cable design, thanks!


Jose Augusto

From Colombia


HOC, a longtime friend and strategic partner whom we trust most, possesses one of the finest fibre optic products and manufacturing technologies and always provides our company with the highest quality products. Cooperation with HOC is happy and successful.


Floyd Russell

From UK


FAQs About Underwater Fibre Cable Wholesale

HOC has been wholesaling fibre optic cable for 19 years and we have encountered all kinds of problems, here are the most important concerns of our customers before closing the deal.

Cable Manufacturing Video Cover

Any benefits for fibre cable wholesale from China?

In a word, China has a much better industry chain. There may be wholesalers of fibre optic cable in US, UK and India, but HOC can guarantee that our prices and our service can be far exceeds your expectations.

How long does it usually take for me to receive the cable?

Depends on whether you want customize your fibre optic cable or not, and also the speed of customs clearance and logistics, but we can guarantee to ship regular standard underwater fibre optic cable in less than 2 weeks, and we have customers in Singapore who received the goods in less than 2 weeks.

Can I come to China for Factory inspection?

Of course, but it is better to wait until the epidemic subsides. Now we support using ZOOM for online factory inspection.

What are the payment options?

You can use Western Union, which has a lower fee, or PayPal if you can accept a slightly higher fee, but please note that for new customers, we only accept the 30% T/T of the payment, or if you have been with us for years and run into cash flow pressure, we do offer OA credit.

What is the most important feature of HOC’s products

Since we have an independent design team(10+ members), we accept all forms of customization, you just give us ideas or even just a word, and we can manufacture your ideal fibre optic cable for your market.

Are you looking for more information on

underwater fibre cable or getting an accurate quote?

No matter your project is complicated or simple, you will get an accurate quotation within 6 hours.

Underwater Fibre Optic Cable FAQs – The Ultimate Buying Guide

What is Underwater Fibre Optic Cable?

Underwater fibre optic cable is one kind of communication fibre optic cable that is laid under water through rivers, lakes and beaches and other places. This cable laying environment conditions are much worse than the pipeline laying and direct burial laying .

How Does Underwater Fibre Optic Cable Work?

Underwater fibre optic cable has layers of steel wire or steel tape armoured structure. The structure of the inner sheath and outer sheath are also needed to take into consideration according to the hydrogeological situation of the river.

For example, in the stony soil, scouring seasonal riverbed, fibre optic cable suffers from wear and tear and high tension, not only thick steel wire is needed for armouring, but even double layer of armouring is required. The method of construction should also be selected according to the river width, water depth, flow rate, river bed, flow speed, river bed soil and so on.

How Can Underwater Fibre Optic Cable Has Great Performance?

The performance of underwater fibre cable comes from its cable design, materials quality, production quality, and the laying techniques.

Cable Design

A perfect fibre cable design for a underwater fibre cable should consider all the conditions in its actual site, such as river bed soil quality, river width, water depth, flow rate, and other site conditions.


The raw materials and production all affect the final quality and performance of a underwater fibre optic cable. So a trustworthy brand or manufacturer is very important.

They will solve you all the problem of materials comparison with reliable quality inspection and experienced and advanced production technology.

Laying Techniques

First of all, the laying speed and specified position of the optical cable shall be controlled.

During the laying process, the optical cable shall not be vacated in the riverbed, and shall not make a small circle. It is also necessary to monitor whether the underwater fibre cable is in good condition, and solve the problem in time to ensure the laying quality of the underwater optical cable.

The laying length should be based on the length of the optical cable determined during the re-measurement route. Generally, the underwater optical cable should extend out of the embankment or the shore for 50 meters. When the design stipulates that the optical cable is laid in an arc at the bottom of the river, it should be based on the baseline at the time of measurement, and the arc should be laid upstream.

What are the Applications of Underwater Fibre Optic Cable?


Underwater fibre optic cable takes following measures to ensure the waterproof performance of the fibre optic cable to laid in lakes, rivers and beaches.

  • Single wire centre reinforcement
  • Loose tube filled with special waterproofing compound
  • Complete core filling
  • Plastic coated aluminum tape (APL) moisture barrier
  • Double-sided plastic-coated steel tape (PSP) improves the moisture resistance of the optical cable
  • Good water blocking material to prevent longitudinal water seepage of the optical cable


When laying fibre optic cables in mountainous or hilly areas, these areas generally have steep terrain, many trees, more rocks and less soil. It is unavoidable to use a protective and good mechanical fibre optic cables.

Because underwater fibre cable has excellent tensile and flattening properties, and has a certain ability to withstand rock crushing and excessive tensile force, it is also suitable for these aeras as climbing fibre cables.

Direct Burial

Although underwater fibre cables are laid in the lakes or rivers, it is also cab be considered as a directly buried fibre optic cable. Moreover, it has more strict requirements than normal directly buried fibre cable on the ground. So a underwater fibre optic cable is also suitable for direct burial applications.

What are the Benefits of Underwater Fibre Optic Cable?

Most fibre optic cables are installed by aerial, duct and direct buried. But when it comes to places with rivers, lakes and beaches, traditional fibre cable laying method would require lot of fibre optic cables and installation costs.

And underwater fibre optic cable perfectlly solve this problem by connecting the both ends with underwater laying. It saves lots of fibre cables, and the laying is also simplified.

Other than that, with the fibre optic cable under the rivers and lakes, it won’t be affected by wind and most animals above ground. Actually, it provide more reliable optical communication networks.

What is the Difference Between Underwater Fibre Optic Cable and Submarine Fibre Optic Cable?

As its name suggests, submarine fibre optic cable (or subsea/undersea fibre optic cable) is fibre optic cable that is laid in the ocean.

To meet the application requirements, the structure of submarine fibre optic cable requires strong and light materials, but not light metal aluminum, because aluminum and seawater will produce hydrogen by electrochemical reaction, and hydrogen molecules will diffuse into the glass material of the fibre, making the loss of the fibre larger.

Therefore, the submarine fibre optic cable must prevent both the internal generation of hydrogen and the infiltration of hydrogen into the fibre optic cable from the outside.

Most of the submarine fibre optic cables are under the sea at a certain depth and are not subject to damage from natural environment such as wind and waves and interference from human production activities. So the submarine fibre cables are safe and stable, with strong anti-interference ability and good confidentiality performance.

What is the Difference Between Underwater Fibre Optic Cable and Direct Buried Fibre Optic Cable?

direct buried fibre optic cable laying

Direct buried fibre optic cable refer to a fibre optic cable which has good performance of resisting external mechanical damage and preventing soil erosion.

Fibre optic units is normally armoured with steel tape and other materials such as double sheath and steel wire outside, and make it is available for directly buried in the ground. Direct burial is the most convenient laying method for fibre optic cable and also save the duct and aerial installation costs.

And the major difference is that the laying environment of underwater fibre optic cable is much worse than the conditions of direct burial laying. So the underwater fibre cable must use steel wire or steel tape heavy armoured structure. Which make most underwater fibre optic cable are available for direct buried laying.

In addition, the repair underwater fibre optic cable failure techniques and measures are also much more difficult, so the reliability requirements for underwater fibre optic cable is also higher than direct burial fibre optic cable.

What are the Types of Fibre Optic Cable?

fibre cable outer sheath materials

According different aspect of fibre optic cable, there are many types of fibre optic cables.

Optical Fibre

Due to different transmission mode of an optical fibre, there are single mode fibre optic cable and multimode fibre optic cable.

Cable Core

How the fibre optic cable is structured is also an important specification of a fibre cable. There are tight buffer fibre cable, loose tube fibre cable, uni-tube fibre cable (or central loose tube), MLT (multi loose tube) fibre cable.

Installation Mode

Different application of a fibre optic cable has different requirements on the cable installation and laying. For instance, there are overhead/aerial fibre optic cable, duct fibre optic cable, direct burial fibre optic cable and underwater fibre optic cable.


Where a fibre optic cable is used affect its specifications too. At a larger scale, we can divide them into the outdoor fibre optic cable type and indoor fibre optic cable type.

Armoured Type

For different application and specs to meet, the fibre optic cable armouring also varies. From light armoured aluminum tape fibre optic cable, corrugated steel tape armoured fibre optic cable, steel wire armoured fibre optic cable, and heavy armoured fibre optic cable with both steel tape and steel wires.

Besides all mentioned above, some industries and network system has specific type of fibre optic cable, such as mining fibre optic cable, FTTH fibre cable, power line fibre optic cable and so on.

What are the Materials for Underwater Fibre Optic Cable?

underwater fibre optic cable materials

Like all the fibre optic cables, underwater fibre optic cable are made of optical fibres in loose tubes. All loose tubes are stranded along an dielectric FRP central strength member in the inner sheath with water-blocking materials.

Sometimes, there is also a layer of corruggated steel tape wrapping the fibre core, to provide extra mechanical performance for the underwater fibre cable.

Outside the inner fibre core, there are a layer of steel wire armuor (SWA) and another layer of water-blocking tape to make the underwater fibre optic cable more compact and protected from its application environment. Finally, there is an outer sheath made of PE sheath.

Does HOC Offers Underwater Fibre Optic Cable Services?

Yes, HOC provides you underwater fibre optic cable solutions with the most experienced designing and manufacturing with extreme quality, reliability, and robustness.

Moreover, thanks to our vast experience in fibre optic cable production, we know how to optimize to save your costs.

Whether it’s your first purchase or multiple purchases, you can get super solutions.

Is HOC’s Underwater Fibre Optic Cable Expensive?

Not at all. HOC underwater fibre optic cable is affordable and of high performances.

With extensive manufacturing experiences on the underwater fibre cables, we know every aspect of the required specifications and how to optimize the underwater fibre cable designing and materials costs.

How Long Does It Take for HOC’s Underwater Fibre Optic Cable to be Delivered?

It is mainly depends on your project.

For regular designs of underwater fibre cable, it generally takes 2-3 weeks to produce and to be delivered. But if the quantity is large and special fibre cable designs, it will take a little bit longer.

How Did HOC Ship the Underwater Fibre Optic Cable to Me?

For underwater fibre optic cables, we will ship the fibre cable in drums to your port.

For better coordination of all your purchased goods, we offer mix-loading services and you can also collect it at our warehouse here in China with your logistics agent.

How to Order?

You can order underwater fibre optic cable by sending your detailed requirements to our sale experts, such as specifications, length, customizations and so on.

Our specialists will get back to you with 12 hours with formal offer to move forward on productions and delivery terms. Any questions, feel free to discuss with us at any time.

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We help you avoid the pitfalls to deliver the quality and value your fibre optic cable need, on-time and on-budget.