Patent ID: 9496676
Filing Date: 2016-11-15
CPC Classification: H01S

Claim Text:
1. An optical amplifier comprising: a plurality of pumping laser diodes that oscillate excitation light to be inputted to an optical fiber amplifier, the plurality of pumping laser diodes including at least a first and a second pumping laser diodes that oscillate excitation light of a generally same wavelength; a first current control element that controls currents flowing through at least the first and second pumping laser diodes; a second current control element that controls at least the current flowing through the second pumping laser diode; and a control circuit that controls the first current control element and the second current control element; wherein when a light level generated by the first pumping laser diode declines, the control circuit controls the first and second current control elements to adjust the current flowing through the second pumping laser diode, so as to compensate the light level.