Patent ID: 9042005
Filing Date: 2015-05-26
Classification: H01S,H04B

Abstract:
1. An amplifying apparatus that raman-amplifies light transmitted through an optical-fiber transmission path, the amplifying apparatus comprising: an inputting unit that inputs pump light to the optical-fiber transmission path; a path switching unit that is capable of switching between a first state in which the light transmitted through the optical-fiber transmission path is output to a first path and a second state in which the light transmitted through the optical-fiber transmission path is output to a second path; a splitting unit that splits the light output to the second path by the path switching unit and outputs resulting first light and second light; and a control circuit that stores information based on a result of reception of the light output to the first path by putting the path switching unit into the first state and then controls power of the pump light on a basis of the stored information and a result of reception of the first light output by the splitting unit by putting the path switching unit into the second state.