Currently, the commonly used central wavelengths for optical modules are primarily in three bands: the 850nm band, the 1310nm band, and the 1550nm band. Why are these three bands defined? This is related to the optical fiber loss. The transmitted optical power is related to the proportion of "1"s in the transmitted data signal; the more "1"s, the. The optical module serves as a crucial component in optical fiber communication systems, operating at the physical layer, which is the lowest layer in the OSI model. Its primary function is to achieve optoelectronic conversion by converting electrical signals into optical signals and vice versa. Among various optical module form factors, SFP (Small Form-Factor Pluggable).
[PDF Version]