OPTICAL AMPLIFIER ARRANGEMENT

摘要

When transmitting mixtures of optical signals with various wavelengths, wavelength-dependent attenuation occurs in optical components, for example optical couplers or glass fibres. This attenuation is compensated in an optical amplifier arrangement (REG) by an optical amplifier (EDFA) with an adjustable, wavelength-dependent amplification. Besides the optical amplifier (EDFA), the amplifier arrangement (REG) has controllable optical attenuating means (DG) and a control unit (CTRL). The amplification achieved by the amplifier (EDFA) is non-linearly dependent on the wavelength at certain output powers. The shape of the amplification curve can be adjusted by the pump light source (PUMP) of the amplifier and the attenuation achieved by the attenuating means (DG). The shape of the amplification curve and the attenuation achieved by the attenuating means (DG) are adjusted by the control unit (CTRL) depending on the level of the optical signals at the output of the amplifier (EDFA).