Hollow core fibers (HCF) are the next generation of optical fiber technology; they are a specialized type of optical fiber designed to guide light through an air-filled central core, unlike conventional single-mode fiber (SMF) that uses a solid glass core. HCF uses photonic bandgap or anti-resonant structures to confine light within the hollow core. This unique design significantly reduces latency and signal distortion, making it a promising solution for high-performance communication systems. Currently there are two main types of hollow core fiber, double nested anti-resonant nodeless fiber (DNANF) and photonic bandgap guiding fiber (PBG), each with their own internal hollow core fiber structure and manufacturing process.
As hyperscale operators and data center owners push the boundaries of network performance, hollow core fiber (HCF) is emerging as the ultimate enabler, delivering ultra-low latency and low loss links for high-speed and data center interconnects.
Hollow core fiber offers several significant advantages, including:
Lower latency: HCF transmits light at nearly the speed of light in vacuum, resulting in latency of approximately 3.33 µs/km, compared to 4.9 µs/km for SMF. Reduced chromatic dispersion (CD): HCF typically exhibits CD values
