1. Home
  2. /
  3. Blog List
  4. /
  5. bend insensitive cables
  6. /
  7. Bend Insensitive Fibres Improve Network Installation Performance and Maintenance

Bend Insensitive Fibres Improve Network Installation Performance and Maintenance

Posted By :
Bend Insensitive Fibres Improve Network Installation Performance and Maintenance

In the world of optic fibre, we are witnessing a significant shift from G652A.D to G657.A1 as the primary transmission fibre due to its superior bend performance. As the fibre deployment rate has exponentially increased, the next critical step is the broader deployment of G657.A2, a better class of bend-insensitive optic fibres. The shift to bend-insensitive fibre deployment, either fully or partially, will bring network installation, performance, and maintenance benefits, especially with the A2 class, as it is backwards compatible with G652.D, the legacy fibre. In this discussion, we shall get a better understanding of the following key topics,

  • A brief background about bend-insensitive fibre standards
  • Examples of highly bend-insensitive fiber deployment in a broader sense in networking and the benefits it brings along with it
  • A2 bend-insensitive fibre compatibility with legacy and actives

Covid-19 lockdown accelerated use-case adoption

Covid-19 lockdown had created a significant surge in daily data consumption. It was due to the fact people were isolated with not much to do in terms of physical movement and travelling. Most employees across the world used the work from home option, and conferences were held virtually, thereby consuming more data than in pre-covid times. The use of social media, OTT, online shopping, video calling, etc., has increased multifold, driving data networks into overdrive. Even post-covid, the data usage has not slowed down since WFH has become the new normal and will continue to do so even in the future. To manage such huge data transfer needs for both upstream and downstream ends, there is a need for a converged, fibre dense, and deeply fiberized network. This is where bend-insensitive fibres will come into the picture and slowly replace legacy fibres.

Network Trends from European operators in COVID Lockdown

Optic fibre evolution

Optical fibres have evolved over decades both in terms of backward compatibility and bend performance. ITU (International Telecommunication Union) standards assess the quality standards and offer recommendations for network fibres. G.652.D has been the gold standard single-mode fibre widely installed across the world. Although they are very efficient in carrying a large amount of data, their bend performance has become an obstacle leading to the development of new and improved optic fibres that are bend-insensitive, which has now led to the development of G.657.A2 bend-insensitive fibres.

The ITU standards have focused on bend performance, but maintaining backward compatibility is an industry imperative that cannot be sacrificed for bend optimization. There are various STL fibres developed from OH-LITE to BOW-LITE SUPER which have different backward compatibility and bend optimization. Has STL developed a fibre that is both backward compatible and bend-insensitive that can successfully replace legacy fibre in networking? At the end of this discussion, you will get an answer.

New Networks- Benefits

Incorporating A2 bend-insensitive fibre into the new networks has the potential to solve a lot of challenges and improve network performance, reduce costs, and faster deployment.

  • Enhanced network performance: The new solutions will improve network performance for a longer period of time.
  • Reduced network ownership costs: The new solutions will reduce network costs and operational expenses.
  • Faster network provisioning: The new solutions enable faster deployment, thus increasing the speed of customer onboarding.

Networks are susceptible to optical losses

Although completely eliminating optical losses is next to impossible, reducing them is still crucial in order to maintain network performance for a long time. There are many optical fiber losses like absorption loss, scattering loss, and radiation loss, but the most prominent loss that affects network performance is macro bend loss. Especially, legacy fibre G.652.D is highly susceptible to macro bend losses, especially over long routes. As there is increased geographical spread, there is more bend and turns in the network path leading to increased macro bend loss at higher wavelengths. The GPON, C-Band, 10G-PON, 40G-PON, and L-Band networks all experience macro bend loss to different extents when legacy fibre G.652.D is used.

legacy fiber loss

Macro-bend Loss Prevalent in Passive Ancillaries

Macro-bend Loss Prevalent in Passive Ancillaries

Macro bend loss is prevalent in long-distance routes with 1.06dB loss per macro-bend point with legacy G.652.D fibre @ 1625nm.

Macro-bend prevalent in passive ancillaries- Access networks

When tests were conducted for 16 routes for access networks with legacy G.652.D fibre, 6 out of these networks experienced data losses greater than 0.5dB due to macro bends at JB’s, tapping boxes, etc.

Factors leading to macro bend losses

Usually, the legacy G.652.D fibre optic networks like FTTH run long distances in km and are divided into feeder networks, distribution networks, and last mile. Various macro bend losses occur at these network junctions. The reasons for such bending losses include,

  • Feeder network
    • Joint Splicing
    • Fibre Attenuation
    • Fibre Cuts
    • Connector loss
    • Accidental bends
  • Distribution network
    • Splitter loss
    • Connector loss
    • Splice loss
    • Accidental bend
  • Last Mile (Inside Building)
    • HTB connector loss
    • Bend loss
    • Staple loss
    • Accidental Bend during O&M

Data transmission interruption with Legacy fibre due to accidental bend

Data transmission interruption with Legacy fibre

A bend-insensitive fibre solves the challenge

Suppose you replace legacy G.652.D fibre with G657.A2 bend-insensitive fibre, then macro bend losses can be reduced significantly as these fibres have the resilience to accidental bends due to cuts and repairs, and deskilled installation allows faster deployment.

bend-insensitive fibre

Reduced operational expense with bend-insensitive fibre

If we manage to replace legacy fibre with bend-insensitive fibre, then we can expect reduced operational costs and increase the network life by 10+ years. In addition, the lower macro bend loss increases resilience and eliminates frequent maintenance and repairs.

Reduced operational expense with bend-insensitive fibre

Legacy fibre-based cables are not ideal for faster network densification; the end-to-end joint splicing process takes a longer time.

Reduced operational expense with bend-insensitive fibre

In comparison, bend-insensitive fibre cable enables faster network provisioning as there is a 40% reduction in installation.

Reduced operational expense with bend-insensitive fibre

The challenge still remains

Although bend-insensitive fibre offers superior performance, MFD mismatch at the connector interface between legacy fibre and bend-insensitive fibre is still a concern. As a result, the network can experience data loss at these junctions, and measurement is also tricky.

MFD Mismatch
MFD mismatch at a connector interface


To hit two birds with one stone, STL has developed a Stellar bend-insensitive fibre that has the best-in-class attenuation and bends insensitivity solving both backward compatibility and bending losses. This right balance makes Stellar the future of fibre networks suitable for multiple applications.

STL Stellar Fiber Bend Insensitive cable

Leave a Reply

Your email address will not be published.

Our Latest Blogs

Enterprise Infrastructure Networks

5 Effects of Fibre Optic Cabling on Enterprise Infrastructure Networks

If you intend on building a campus network that requires high speeds, optimal bandwidth, and high-speed connections, then fibre optic cabling can...
Read More
Optical Fiber

Interesting Facts on Optical Fibre and Optical Fibre Cable

The era of internet connection has now been revolutionised with the introduction of optical fibre technology. With the incorporation of...
Read More
IOT(Internet Of Things)

How do Telcos contribute to utilities that utilize IoT technology?

Today, more than 13 billion IoT devices are connected across the globe. The industry is expected to surpass 25.4 billion...
Read More
Managed Service

Driving Value with Managed Services

Technology is evolving at a consistent and rapid pace. Technology specialists are incorporating cutting-edge practices to boost the efficiency of...
Read More
Digital Network

Bridging the Digital Divide in the UK

The Digital Divide in the UK The "digital divide" is a growing concern in the UK, where access to technology...
Read More
Optical Fiber

Debunking the Common Myths about Optical Fibre

As data-intensive applications like video streaming, online gaming, and cloud computing become more common, the need for increased bandwidth has...
Read More
Fiber Optic Testing Tools

How Robotic Tools are Revolutionizing the Detection of Optical Fiber Failures

The fiber optic communication industry has revolutionized the entire Telecommunication industry by providing higher performance, more reliable telecommunication links with...
Read More
Fiber Optic Technology

Recent Advances in Optical Networking Technology: A Look at the Future of Data Transmission

Since several decades ago, optical networking technology has been developing quickly. Fiber optics is becoming a key component of the...
Read More
Optical Interconnect Technology

Optical Interconnect Vs. Electrical Interconnect: All You Need to Know

Interconnectedness is increasingly becoming the backbone of a modern, progressive world. It is what is driving the escalation of digital...
Read More
Network Running

Keep The Network Running in The Remotest Locations: Here’s How STL Can Help

The pandemic has unravelled the importance of reliable connectivity. From smart classes to online groceries, the internet is everywhere. Yet,...
Read More
Managed Service

5 Benefits of Using a Managed Security Services Provider

Investing in cybersecurity is the need of the hour as the cyber threat landscape evolves. But as cyber threats continue...
Read More
Optical Interconnect Technology

An Overview of Optical Interconnects: How They Work and Their Advantages

Optical interconnects are a crucial component of modern electronic systems. They are used to transmit data and power between different...
Read More
Network System Integration

Network System Integration: A Guide to Choosing the Right Optical Fiber Manufacturing Company

One of the crucial factors of a network system integration project is choosing an appropriate fiber cable; they determine the...
Read More
Optical Fiber

10 Ways Optical Fibre Has Changed the World

Optical fiber has revolutionized the way we communicate and access information. From high-speed internet to advanced medical procedures, the benefits...
Read More
Data Center Design

Designing Data Centre Networks: Strategies for Maximum Efficiency and Performance

Data centre design and the data network that supports it are critical components of any organization's IT infrastructure. The way...
Read More
Network Modernization

Accelerating Your Network Modernization Process

Network modernization is crucial for businesses to stay competitive in today's digital economy. However, the process can be time-consuming and...
Read More
Network services

Understanding Network Services and How They Enhance Your Business

A robust network is a must for any type of company in the twenty-first century because most products are digital...
Read More
Data centre

The Rise of Data Centers in India

With data consumption on the rise, cloud adoption accelerating, and technology demand soaring higher than ever before - Indian corporations...
Read More
RAN Services

Building a Faster, More Connected Healthcare Network with Radio Networks

In recent years, the category of linked medical devices has expanded to encompass Internet of Things (IoT) gadgets and a...
Read More
Network services

The Role of Network Integration in Telecom Companies

Network services integration and management are a significant deal. The richness of new telecom technology, whether on-premise or cloud-based, makes...
Read More

Our Services

Network services

The digital ecosystem and landscape is rapidly to mirror the continuous evolution of communication infrastructure, connectivity, and next gen use cases...
Read More

Fiber Roll out Services

We offer a dependable fiber-based backhaul solution that promises seamless high-speed connectivity and increased reliability for a better network experience...
Read More

Managed Services

We encourage customers to seize business opportunities by simplifying network management and maintenance, which standardized SLAs govern...
Read More

Data Centre Network

Future use cases will require cloud-native infrastructure. With our network transformation services, we out-innovate the current constraints in the data center space...
Read More

RAN Services

The approach of RAN network disaggregation comes at the expense of increased integration touch-points and engineering efforts...
Read More