AWG (Array Waveguide Grating)
Array waveguide grating is usually used in WDM system optical (DE) multiplexers of Wavelength division multiplexing WDM system. These devices can compound the lights with many wavelengths into a single optical fiber, so as to improve the transmission efficiency of optical fiber network. Array waveguide grating is based on different wavelengths of light basic optical principle of linear interference between each other. This means that, if every channel use the wavelength nuances with the light, the light of the many channels can be carried by a single optical fiber, and there is only negligible signal crosstalk.
Array waveguide grating is based on basic optical principle of different wavelengths linear interference between each other. This means that, if every channel use the wavelength nuances with the light, the light of the many channels can be carried by a single optical fiber, and there is only negligible signal crosstalk.The array waveguide grating, in the transmission end, can compound the lights of multiple channels into a single optical fiber, and at the same time, separate the lights again at the receiving end.
As below chart, optical information freely in the optical fiber 1, when arriving at 2, into a bunch of optical fiber, in 3, the light transmission in the multiple fiber, due to the fiber length is different, every fiber of phase shift is different either; in 4, there is light interference in the different fibers, and only certain wavelengths of light in each export channels.The forward process is the separation process;The reverse process is the compound process.
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