Tech Tip #31 From Light to Internet: the story of fiber optics

From Light to Internet: the story of fiber optics

By Olivia Wells, Marketer at LigTel

When people hear “fiber internet,” they usually think of speed.

And yes, fiber is fast.

But what actually makes fiber different?

A common myth is that fiber is just another internet cable.

Not quite.

Fiber optic internet uses thin strands of glass or plastic to send information using light. One article described fiber like a “light pipe” because light travels through the fiber kind of like water moving through a pipe.

Basically, your internet is traveling as light.

Pretty cool, right?

How Does Fiber Work?

The science behind fiber is called total internal reflection.

Source: https://wiki.testguy.net/t/fiber-optic-cable-fundamentals-and-testing-explained/62

Here’s a simple visual: the light signal travels through the center of the fiber, called the core. The outer layer, called cladding, helps keep the light inside so it can keep moving down the line.

So even though fiber may look like a cable, it works very differently from older copper-based connections.

Copper sends electrical signals.

Fiber sends light.

Fiber Started Before Home Internet

Fiber optic technology did not start with Netflix, Zoom calls, or smart TVs.

One of its first major uses was actually in medicine. Fiber optics helped make endoscopes possible, allowing doctors to see inside the body without large invasive cuts.

In 1954, Dr. Narinder Singh Kapany and Harold Hopkins separately created fiber bundles that could transmit images. Kapany is often called the “Father of Fiber Optics” because his work helped prove that light and images could travel through bundles of glass fibers. Fiber Optic Timeline

That was a huge step.

But fiber still had another challenge before it could become useful for communication.

Fiber Started Before Home Internet

In the 1960s, Charles K. Kao helped show how fiber could be used to send information over long distances.

At the time, many people thought glass fibers lost too much light to be useful for communication. Kao helped show that the issue was not the fiber idea itself, but impurities in the glass. If the glass could be made pure enough, fiber could carry large amounts of information much farther. Kao is often called the “father of fiber optic communications” for this work. PMC

That work helped move fiber from a medical and scientific tool toward the communication networks we use today.

So when people ask, “Who invented fiber internet?” the better answer is:

It was not just one person.

Kapany helped prove what fiber optics could do.

Kao helped show how fiber could be used for long-distance communication.

And many other scientists and engineers helped turn those ideas into real networks.

Fiber Kept Growing

By the 1970s, companies began testing fiber optic communication systems. FOA Timeline

In 1970, Corning researchers developed low-loss optical fiber, which helped make long-distance fiber communication more practical. Corning

By the late 1970s and 1980s, fiber was being tested and used in real-world communication systems. The Fiber Optic Association’s timeline notes several key milestones, including 1977 fiber optic field trials and the use of fiber to transmit TV coverage for the 1980 Winter Olympics at Lake Placid. FOA Timeline

By the 1990s and 2000s, fiber became more and more important as the internet grew.

And today, fiber is part of the backbone that supports so much of modern life.

Streaming.
Video calls.
Remote work.
Online school.
Gaming.
Smart TVs.
Security cameras.
Cloud storage.
Businesses.
Healthcare.

Even wireless networks, including 5G, rely on strong fiber connections behind the scenes.

Why Fiber Matters Today

Fiber is not just about having faster internet today.

It is about having a connection that can handle more demand as technology keeps growing.

Homes have more connected devices than ever.

Businesses rely on cloud tools, phones, payment systems, security systems, and online communication.

Communities need strong infrastructure to support growth, education, healthcare, and local businesses.

That is why fiber is often called future-ready internet.

It started with a simple but powerful idea:

Can we send information using light?

Decades later, that idea helps keep homes, businesses, and communities connected every day.

Ameri Fiber — “Who Invented Fiber Optics?”
Mayo Clinic Proceedings — “Charles K. Kao—Father of Fiber Optics”
Test GuyFiber Optic Revolution
Fiber Optic Association Timeline
Corning Optical Fiber History / Timeline

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