Patent ID: 9019593
Filing Date: 2015-04-28
Classification: H01S,H04B

Abstract:
1. An optical amplification apparatus comprising: a front-stage semiconductor optical amplifier which amplifies an input light; and a rear-stage semiconductor optical amplifier which amplifies an amplified light outputted from the front-stage semiconductor optical amplifier, wherein: the front-stage semiconductor optical amplifier exercises auto level control of an output light by exercising variable control of driving current which flows according to applied voltage higher than light emitting threshold voltage of an internal optical amplification element; and the rear-stage semiconductor optical amplifier performs gate switching of a transmitted light by exercising switching control of driving current; wherein the rear-stage semiconductor optical amplifier receives optical packet signals which are equal in level in the time direction as a result of the auto level control operation by the front-stage semiconductor optical amplifier; and wherein the rear-stage semiconductor optical amplifier performs gate switching of the transmitted light at a constant gain by exercising switching control of driving current a value of which is constant and which flows according to applied voltage on which an edge enhancement is performed by the use of fixed values of parameters.