First Demonstration of Hollow-Core-Fiber Cable for Low Latency Data Transmission

Abstract

We present the first field-deployable hollow-core-fiber (HCF) cable and successfirlly demonstrate an error-free transmission of direct-detection 10Gb/s DWDM signals over a 3.1km cascaded HCF cable link, enabling 31% latency reduction compared to solid-corefiber cable.

Recent Advancement in Power-over-Fiber Technologies

“…In Section 3, the actual applications of PWoF systems using these fibers are described comprehensively. In addition to the abovementioned fibers, hollow-core fibers (HCFs) are attractive optical fibers that have recently garnered significant attention [10,11]. This fiber enables the transmission of optical signals by confining them in a hollow region corresponding to the core.…”

“…Moreover, because the core of HCPs is air, it is highly resistant to the input optical power, and is less susceptible to various phenomena that occur in silica-core optical fibers, such as chromatic dispersion, nonlinear effects, and modal noise in the fiber. By contrast, HCFs exhibit a complicated cross-sectional structure that can efficiently confine light in its hollow core [10,11]; currently, long-distance spinning in HCFs is difficult to achieve as many issues remain to be solved before the practical stage can be reached. As for PWoF technologies using other optical fibers, simultaneous signal and power transmission experiments using a large-core microstructure optical fiber [12] and a step-index plastic optical fiber [13] have also been reported recently.…”

“…In particular, an SMF with a small core has an extremely high power density, which causes the optical fiber connections to be damaged easily and limits the transferable optical power. A practical approach for solving this problem is to use an expanded beam connection In addition to the abovementioned fibers, hollow-core fibers (HCFs) are attractive optical fibers that have recently garnered significant attention [10,11]. This fiber enables the transmission of optical signals by confining them in a hollow region corresponding to the core.…”

Glass: The carrier of light—Part II—A brief look into the future of optical fiber

“…37 With respect to low latency, here the lack of a solid core phase has unquestionably exceeded what a conventional glass fiber can do. [38][39][40] More recently, a second important general category of hollow-core fibers was realized, the so-called "negative curvature" (or anti-resonant) fibers. [41][42][43] These fibers possess a simpler structure than the hollow core bandgap photonic crystal fibers, which makes their fabrication somewhat more straight-forward and their yield higher.…”

“…That said, while pure silica core fibers remain the lowest loss waveguides to‐date, at wavelengths away from their minimum loss, hollow cores fibers can give silica a run for its money 37 . With respect to low latency, here the lack of a solid core phase has unquestionably exceeded what a conventional glass fiber can do 38‐40 …”