Standards library
Practical summaries of the international standards that govern fiber optics — with links to the official sources. Standards texts are copyrighted by their publishers; always obtain the official document.
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IEEE
802.3 (Ethernet)
Fiber optic Ethernet physical layers
Defines optical PHYs from 10BASE-FL to 400G+/800G: 1000BASE-SX/LX, 10GBASE-SR/LR/ER, 100GBASE-LR4, 400GBASE-DR4/FR4 and beyond, with reach/fibre-type requirements.
ITU-T
G.694.1 / G.694.2
Spectral grids for WDM (DWDM / CWDM)
G.694.1 defines the DWDM frequency grid (100/50/25/12.5 GHz and flex-grid); G.694.2 defines the 18-channel CWDM wavelength grid from 1271 to 1611 nm with 20 nm spacing.