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"UK photonics researchers have developed a new kind of hollow-core optical fibre that can transmit light signals about 45% further than current telecom fibres before needing a boost. ..."
From the abstract:
"A critical component of optical communications is the availability of a suitable waveguide technology for the transport of electromagnetic waves with low loss over a broad spectral range.
In the past four decades, despite extensive research, the attenuation and spectral bandwidth of silica-based optical fibres have remained relatively unchanged, with state-of-the-art fibres offering values of 0.14 dB km−1 and 26 THz below 0.2 dB km−1, respectively.
Here we report a microstructured optical waveguide with unprecedented transmission bandwidth and attenuation, with a measured loss of 0.091 dB km−1 at 1,550 nm that remains below 0.2 dB km−1 over a window of 66 THz. Instead of a traditional solid glass core, this innovative optical fibre features a core of air surrounded by a meticulously engineered glass microstructure to guide light. This approach not only reduces attenuation and other signal degradation phenomena, but it also increases transmission speeds by 45%. Furthermore, the approach theoretically supports further loss reductions and operation at wavelengths where broader bandwidth amplifiers exist, potentially heralding a new era in long-distance communications as well as remote delivery of laser beams."
Novel hollow-core optical fiber transmits data 45% faster with record low loss
Fig. 2: Characterization of the fabricated fibre.
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