Applications of Hollow-Core Optical Fiber in Communication

Hollow-core optical fibers are currently used in low-latency data links, high-speed trading, 5G network backbones, and experimental high-performance data transmission systems.

Low-Latency Data Links

Hollow-core fibers (HCFs) allow light to travel nearly at the speed of light in vacuum, reducing latency by up to 30–50% compared to conventional solid-core fibers. This makes them particularly valuable for high-frequency trading (HFT), where milliseconds can impact financial transactions . The reduced interaction of light with glass also minimizes nonlinear effects, ensuring cleaner signal transmission.

5G and Next-Generation Networks

HCFs are being integrated into 5G network backbones to enhance performance and reduce latency. Companies like ZTE are actively deploying hollow-core technology to support ultra-low latency communication and high-bandwidth requirements in dense urban and high-demand areas . Their broad low-loss spectrum, extending up to 2100 nm, allows for flexible wavelength allocation in telecom networks .

Data Centers and High-Performance Computing

HCFs are under trial for data centers and AI-driven computing networks, where high-speed, low-latency interconnects are critical. The fibers' ability to carry high optical power with minimal nonlinear distortion makes them suitable for ultra-fast data transmission and next-generation optical interconnects .

Experimental and Specialized Applications

Beyond conventional telecom, hollow-core fibers are being explored for high-power laser delivery, quantum communication, and precision sensing. For example, anti-resonant hollow-core fibers (NANFs) have successfully transmitted kilowatt-class laser beams over hundreds of meters with minimal loss, demonstrating potential for industrial and scientific applications . These fibers preserve both spatial and spectral properties of the transmitted beam, which is critical for high-brightness and narrow-linewidth laser systems.

Advantages Driving Adoption

• Reduced latency: Light travels faster in air-filled cores than in glass, improving transmission speed .
• Lower nonlinear effects: Kerr, Brillouin, and Raman scattering are significantly reduced .
• Wide low-loss spectrum: Supports wavelengths from visible to 2100 nm .
• High-power handling: Suitable for high-intensity optical signals .

Outlook

While widespread deployment is still limited, HCFs are gaining traction in high-value, high-performance zones such as financial trading hubs, 5G backbones, and experimental data centers. Ongoing R&D and commercial trials suggest that hollow-core fibers could become a standard for ultra-low latency and high-speed optical communication in the near future .