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In order to assess the emission spectrum of a fiber, it is excited by pumping into an absorption band at shorter wavelength and measuring the emission at longer wavelength.

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Related Terms: Absorption, Active Medium, Amplified Spontaneous Emission, Amplifier, Emission Cross Section, Emission Measurement, Emission Spectra, Erbium Doped Fiber (EDF), Erbium Doped Fiber Amplifier (EDFA), Gain Coefficient, Pumping, Spontaneous Emission