Patent ID: 6388804
Filing Date: 2002-05-14
Classification: H01S

Abstract:
An optical amplifier comprising:an optical amplifying medium which inputs a pumping light and a signal light simultaneously and amplifies the signal light, a light source which generates the pumping light, and a pumping light controller which controls power of the pumping light; wherein said pumping light controller provides in advance information on a relation between power of an output light of said optical amplifying medium and power of the pumping light on condition that a gain tilt arising through said optical amplifying medium among individual signals of different wavelengths which form the signal light based on wavelength division multiplex is virtually constant or virtually minimum, takes out a value of the power of the pumping light from the relation in response to a value of the power of the output light resulting from amplification by said optical amplifying medium, and controls said light source so that the generated pumping light has the taken out value of the power of the pumping light.