SEMICONDUCTOR OPTICAL AMPLIFIER DEVICE

摘要

The invention relates to a semiconductor optical amplifier, the construction of which is based on the production of semiconductor lasers and which is structured into multiple stages, comprising at least two active zones (1, 2) with gain which are separated by a passive zone (3) with controlled losses by means of a direct current (10) that is injected through the electrode (6). An electric modulation signal (5) with a first frequency (f1) is introduced through the first active zone (1), mixed with the optical signal (4) entering the device and amplified. The passive zone (3) attenuates the optical output signal from the first stage (11), such as to produce a second optical signal (12) which enters the second active zone (2) in order to be mixed with the electric signal (5) at a second frequency (f2). Finally, the optical output signal (13) is obtained with the frequencies added to each other (f1+f2), with the frequencies subtracted from each other (f1-f2) or with double each frequency (2f1, 2f2).