Hollow‑core fiber is no longer a lab technology. It is live, proven, and being deployed at scale. Microsoft’s hollow‑core fiber cables with our patented LC connector are already carrying production traffic in the Microsoft Azure network, supporting cloud and AI infrastructure worldwide.

Scaling hollow‑core fiber requires more than advanced cable designs, it demands seamless integration with existing single‑mode equipment, which our patented LC connector for hollow‑core fiber does. A low‑loss, production‑ready interface between hollow‑core fiber and standard single‑mode devices.

Hollow‑core fiber (HCF) is an advanced optical fiber technology that guides light through a hollow air‑filled core rather than solid glass. By confining light predominantly to air, hollow‑core fibers fundamentally change how optical signals propagate, delivering performance characteristics that go beyond what is possible with conventional single‑mode fiber.



Unlike traditional silica fibers, where light travels through glass, hollow‑core fibers use engineered microstructured cladding to keep the optical signal tightly confined within the hollow core. The result is a transmission medium that combines ultra‑low latency, very low non‑linear effects, and exceptional signal fidelity.

Thanks to its unique properties, hollow‑core fiber is particularly well suited for demanding and emerging use cases:

• AI and machine learning workloads
  Latency‑sensitive AI training and inference benefit directly from faster signal propagation and lower jitter.

• Hyperscale and data center interconnects (DCI)
  Reduced latency and improved signal quality support higher performance at scale.

• High‑frequency trading and financial networks
  Even microseconds matter and HCF helps minimize end‑to‑end delay.

• Scientific, sensing, and metrology applications
  Low non‑linearity enables precise timing and signal integrity.

As adoption of hollow‑core fiber accelerates, seamless integration into existing single‑mode infrastructures becomes essential.

Despite its advantages, hollow‑core fiber cannot be terminated directly because its air‑filled core is fragile and requires sealed, controlled mode conversion to maintain low loss and stable performance.

Also, hollow‑core fiber must ultimately connect to standard single‑mode optical devices such as transceivers, optical circuit switches or similar but it’s optically mismatched to single‑mode fiber. Conventional connectors are not optimized for this mismatch, leading to excess insertion loss, reduced performance, or complex custom solutions.

Reliable, low‑loss connectivity is therefore a critical requirement for real‑world deployment of hollow‑core fiber.

This is where our innovation comes into play.

We have developed and patented a specialized LC connector designed specifically for hollow‑core fiber, enabling direct, low‑loss connection to standard single‑mode interfaces.

Key benefits of our hollow‑core LC connector include:

• Optimized mode‑field transition between hollow‑core fiber and single‑mode fiber
• Minimal insertion loss, even with larger HCF core diameters
• Standard LC form factor for easy integration into existing network equipment
• Scalable, production‑ready design suitable for data centers, transport networks, and advanced applications

With our connector technology, hollow‑core fiber can be deployed without compromising compatibility, performance, or operational simplicity.