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why are we using 980 and 1480 nm laser pumps only? why not others?
Because those wavelengths are the ones that can excite Erbium atoms in the fiber core and get Emissiion in the C or L band wavelength
why are we using 980 and 1480 nm laser pumps only? why not others?
Because those wavelengths are the ones that can excite Erbium atoms in the fiber core and get Emissiion in the C or L band wavelength