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High‐efficiency optical waveguide amplifiers are becoming desperately desirable in integrated photonics to provide sufficient power compensations. Various material platforms have been employed to realize on‐chip waveguide amplifiers to date. Chalcogenide glasses (ChGs), as one of the well‐developed and promising optical platforms, have been extensively studied due to the excellent properties of low...
Optical communication technology based on the wavelength, time, polarization, and complex amplitude of light is approaching a bottleneck, while the spatial dimension is relatively unexplored. Orbital angular momentum (OAM) beams are an important group of spatial light beams that are promising for increasing the optical communication capacity based on their orthogonality. To effectively utilize this...
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