We report a microstructured optical waveguide with unprecedented transmission bandwidth and attenuation, with a measured loss of 0.091\u2009dB\u2009km\u00a0at 1,550\u2009nm that remains below 0.2\u2009dB\u2009km\u00a0over a window of 66\u2009THz. Instead of a traditional solid glass core, this innovative hollow core fiber (HCF) 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.<\/p>\n","protected":false},"excerpt":{"rendered":"
We report a microstructured optical waveguide with unprecedented transmission bandwidth and attenuation, with a measured loss of 0.091\u2009dB\u2009km\u00a0at 1,550\u2009nm that remains below 0.2\u2009dB\u2009km\u00a0over a window of 66\u2009THz. Instead of a traditional solid glass core, this innovative hollow core fiber (HCF) features a core of air surrounded by a meticulously engineered glass microstructure to guide light. 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