“…SM operation long-wave (LW) VCSELs operating at a wavelength of 1300-1550 nm, which provide data transmission over distances of more than 1 kilometer through the second and third optical fiber transmission windows, are used in high-performance urban networks to reduce energy consumption and occupied space by electronic components [14,15]. Furthermore, SM LW VCSELs can be used for optical interconnections with a small radius of operation, for example, in transceivers or active optical cables [16], since the combination of SM and multimode fibers in data processing centers requires the use of wavelength-separated multiplexing devices to increase both the capacity and the accessibility of the data centers [17].…”