| 摘要 |
1-"A DOUBLE PASS OPTICAL AMPLIFIER WITH UNIDIRECTIONAL COMPENSATION OF CHROMATIC DISPERSION AND OBSTRUCTION OF BACKSCATTERING", composed by an EDFA, whose input/output stage is integrated by a circulator ( 6 ), and the amplification stage is composed by a pump laser ( 1 ) and an Erbium-doped fiber connected to a multiplexer ( 3 ), said amplifier, in which the optical signal undergoes an initial amplification while passing through the Erbium-doped fiber on the way through the fiber and a second amplification on the way back of the same fiber, presents, after the amplification stage, at least one dispersion compensating fiber ( 11 ), whose input and output are connected to the free extremity of the Erbium-doped fiber ( 2 ), through at least one device ( 12 ) arranged in the circuit in order to prevent the backscattering generated in the dispersion compensating fiber ( 11 ) from returning to the Erbium-doped fiber ( 2 ) and to allow the signal to travel through the dispersion compensating fiber ( 11 ) only once and in one direction, and then return to the amplifier circuit.
|
