Frequency grid
Encyclopedia
The most common frequency grid is that used for channel spacing in Dense Wavelength Division Multiplexing (DWDM)
for Fiber-optic communication
at wavelengths around 1550 nm and defined by ITU-T G.694.1 (2002). The grid is defined relative to 193.1THz and extends from 191.7 THz to 196.1 THz with 100 GHz spacing. While defined in frequency the grid is often expressed in terms of wavelength in which case it covers the wavelength range of 1528.77 nm to 1563.86 nm with approximately a 0.8 nm channel spacing.
For practical purposes the grid has been extended to cover 186 THz to 201 THz and sub divided to provide 50 GHz and 25 GHz spaced grids.
Wavelength-division multiplexing
In fiber-optic communications, wavelength-division multiplexing is a technology which multiplexes a number of optical carrier signals onto a single optical fiber by using different wavelengths of laser light...
for Fiber-optic communication
Fiber-optic communication
Fiber-optic communication is a method of transmitting information from one place to another by sending pulses of light through an optical fiber. The light forms an electromagnetic carrier wave that is modulated to carry information...
at wavelengths around 1550 nm and defined by ITU-T G.694.1 (2002). The grid is defined relative to 193.1THz and extends from 191.7 THz to 196.1 THz with 100 GHz spacing. While defined in frequency the grid is often expressed in terms of wavelength in which case it covers the wavelength range of 1528.77 nm to 1563.86 nm with approximately a 0.8 nm channel spacing.
For practical purposes the grid has been extended to cover 186 THz to 201 THz and sub divided to provide 50 GHz and 25 GHz spaced grids.