Which wavelength is best for multimode optical cables
Multimode fiber typically operates at a wavelength of 850 nm as it allows for the use of lower-cost, light-emitting diode (LED) sources as the light source over shorter distances. At fixed radius and refractive index, the number of modes allowed depends on the wavelength. 5 microns (µm) compared to the 9 microns (µm) core diameter of single-mode fiber. Its main advantage is that it uses laser-optimized multimode fiber (LO-MMF), which is designed to work with vertical-cavity surface-emitting lasers (VCSEL) and was made to support faster networking speeds such as 10G, 40G, and 100G Ethernet.
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