Abstract: Regulated optical amplifiers for wavelength-division multiplex signal transmission that include a first control device for regulating the gain and a second, dominating control device having a significantly slower control behavior for regulating the output power level in conformity with a supplied rated power value. Both rapid level changes as well as slow changes in attenuation of the transmission path can be leveled with a transmission path utilizing these amplifiers.

Abstract: The regulated optical amplifiers (V) for wavelength-division multiplex signal transmission respectively comprise a first control device (OE1, OE2, R1) for regulating the gain and a second, dominating control device (OE2, R2, R1) having a significantly slower control behavior for regulating the output level (POUT) in conformity with a supplied rated value (POUT). Both rapid level changes as well as slow changes in attenuation of the transmission path can be leveled given a transmission path equipped with these amplifiers.

Abstract: A configuration for setting the frequency of a transmitting laser in an optical transmission system having a transmitting end and a receiving end, includes, a first controlling system, a power meter, a service channel, and a controlling system. The first controlling system provided at the transmitting end varies experimentally a frequency of the transmitting laser. The power meter provided at the receiving end measuring a power of the received signal. The service channel connects to said power meter. The controlling system at the receiving end receives measured values from the service channel. The controlling system measures the received measured values and varies the frequency of the transmitting laser to maximize the received power.