Scatterings
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Hollow-core photonic bandgap fibers.
Scanning-electron-microscope image of a low-loss hollow-core photonic bandgap fiber.
Hollow-core photonic bandgap fibers can transport light in the core with very low loss because the cladding prohibits light transmission throughout a range of wavelengths called the bandgap. They are useful for high-power, ultrafast, and nonlinear optics applications. Some uses require both a wide bandgap and low attenuation, but a typical tradeoff for reducing attenuation in the fiber had the effect of decreasing the width of the bandgap.
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