Control method of excitation light source and optical amplifier control method in optical amplifier and optical amplifier

摘要

For example, in an optical amplifier used in a wavelength multiplexed optical communication system, an input signal light is amplified in order to stably or excite an excitation light source in accordance with an increase or decrease in the number of channels of signal light during operation of an optical communication system An optical amplifying section (2) to be output, a plurality of pumping light sources (3,4), and an excitation light source control section (5) for controlling the operation of the excitation light sources (3, 4) are provided, and the excitation light source is composed of a main pumping light source (3) and an auxiliary excitation light source (4), and an excitation light source control section (5) has an input signal light of When the number of channels is greater than the predetermined number of channels, the main pumping light source (3) and the auxiliary excitation light source In this case, a control unit (7) is provided so as to supply the excitation light in cooperation.