TECHNICAL
Hollow-core fibre (HCF) testing explained: questions and misconceptions
Hollow-core fibre (HCF) is moving rapidly from research labs into real-world deployments—particularly for data centre interconnects (DCI), high-performance computing and latency-sensitive networks. While its physical structure differs fundamentally from conventional single-mode fibre, the objectives of fibre testing remain the same:
n Ensure performance
n Validate deployment
n Support long-term reliability
As interest in HCF grows, so do misconceptions around how it should—or shouldn’t—be tested. Below, we address the most common questions we hear from network operators, hyperscalers and fibre manufacturers, based on real-world validation and field experience.
by Astra Baltayan, Marketing Manager, EXFO Originally published by EXFO.
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MAY 2026 Volume 48 No.2
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