Patent ID: 8848283
Filing Date: 2014-09-30
Classification: H01S,H04B

Abstract:
1. Optical amplification device for receiving an optical input signal and transmitting an amplified optical output signal on the basis of the optical input signal comprising: an optical amplifier comprising an input and an output; an optical gain control unit connected to the output path of the optical amplifier and the optical gain control unit connected to the input path of the optical amplifier, the optical gain control unit configured to control the gain of the optical output signal; and an electrical gain control unit connected to the output path of the optical amplifier and the electrical gain control unit connected to the input path of the optical amplifier, the electrical gain control unit configured to control the gain of the optical output signal; wherein the electrical gain control unit is further connected to said output path of the optical amplifier by means of an optical add/drop filter and is configured to control the operating parameters of the optical amplifier by means of a control signal, wherein the electrical gain control unit is configured to incorporate a target gain for the optical amplifier, wherein the optical gain control unit comprises an attenuation device connected to the output path of the optical amplifier and the attenuation device is connected to the input path of the optical amplifier, and wherein the attenuation device is controlled depending on the target gain supplied to the electrical gain control unit.