Fiber optic networks are the base of how data moves around the world. They carry a lot of data between cities, countries, and even continents at very high speed. Today, many companies use cloud services, data centers, and AI platforms. Because of this, the need for strong and stable fiber networks keeps growing. One important type of network is long haul fiber. It helps companies send data over very long distances.
In this article, we explain what long haul fiber is and how it works. We also compare it with dark fiber and explain the main differences. If you are a hyperscaler, OTT provider, or telco company, understanding these two types of fiber can help you choose the right network for your business.
What is long haul fiber?
Long haul fiber is a fiber optic network that connects places over very long distances, usually more than 50 kilometers. It carries large amounts of data between cities, regions, and countries. Because of this, telcos, internet providers, and cloud companies use it as an important part of their wide area network. Most long haul fiber networks are already active and managed by a service provider.
As a customer, you pay for a set amount of bandwidth on a certain route, and the provider takes care of the equipment and maintenance. This makes it simple and ready to use from the start, but you share the network with other customers, so you have less control. Kings Research says the global dark fiber market was worth USD 7.45 billion in 2024, and the long haul segment may reach USD 11.31 billion by 2032, which shows strong growth in the future.
Is dark fiber better than long haul fiber?
Dark fiber is a good choice for companies that want full control of their network. It is fiber cable that is already installed but not active yet. When you lease dark fiber, you use your own tools to turn it on and use it. You can control the bandwidth, route, speed, and security. There is no need to depend on another provider. At the same time, you get your own fiber line that no one else uses, so you can grow your capacity anytime and keep your data safer.
The provider usually manages long haul fiber, which makes it different. The provider controls the network and the tools, and the service is ready to use. This is good if you do not want to manage the network by yourself. In the end, the best choice depends on your needs. Dark fiber is better if you want more control and easy growth. This fiber is better if you want a simple and ready service.
Long haul fiber and dark fiber side bySide
Here is a simple comparison between long haul fiber and dark fiber, such as:
- Distance: This fiber can go 50 km or more. It connects cities, areas, and countries.
- Network status: It is already active and the provider runs it. Dark fiber is already in the ground, but it does not send data until you use your own equipment to turn it on.
- Ownership: It is shared with other customers and managed by the provider. Dark fiber is only for you. No one else uses the same line.
- Control: The provider controls this service. With dark fiber, you control the speed, path, safety, and how the network runs.
- Growth: Dark fiber lets you increase capacity anytime. You are not limited by a fixed plan.
- Best for: This service is good for companies that want a simple and ready network. Dark fiber is better for companies that want full control, more choice, and lower cost in the long run.
- Market data: Based on data from Mordor Intelligence, this type of network made up 52.38% of the 2024 dark fiber market. In Asia-Pacific, demand for fiber is expected to grow by 14.21% each year until 2030, helped by more data centers and cloud services.
Choosing the right fiber infrastructure for your network
Long haul fiber and dark fiber serve different needs. This fiber is managed by the provider and is ready to use, so you do not need to handle the network yourself. Dark fiber is different because you control the network and choose your own equipment. The best choice depends on your company size and how much control and flexibility you need.
For companies in Southeast Asia that need a trusted dark fiber partner, ARNet offers a strong all-fiber network of more than 10,000 km across Malaysia, Indonesia, Singapore, and Thailand. ARNet provides dark fiber, long haul fiber, metro fiber, and last mile fiber. This means ARNet can support cross-border routes as well as direct building connections.
ARNet is the only single-entity provider in Southeast Asia with full control of its operating licenses in the region. The company builds and runs its own network, so deployment is fast and service quality is stable. With a clear SLA commitment, ARNet is ready to support hyperscalers and network operators that need reliable and scalable infrastructure to grow.
About the Author
Nabila Choirunnisa, Digital Marketing Executive at ARNet