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About: C band (infrared)     Goto   Sponge   NotDistinct   Permalink

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In infrared optical communications, C-band refers to the wavelength range 1530–1565 nm, which corresponds to the amplification range of erbium doped fiber amplifiers (EDFAs). The C-band is located around the absorption minimum in optical fiber, where the loss reaches values as good as 0.2 dB/km, as well as an atmospheric transmission window (see figures). The C-band includes the 50 GHz-spaced DWDM ITU channels 16 (1564.68 nm, 191.6 THz) to 59 (1530.33 nm, 195.9 THz).