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公开(公告)号：US20200153191A1
公开(公告)日：2020-05-14
申请号：US16230305
申请日：2018-12-21
发明人： Chengpeng FU , Zhenyu YU , Qing LIU , Menghui LE , Chunping YU
摘要： The present invention relates to the field of optical communication, and particularly to a balanced pumping L-band optical fiber amplifier comprising a first erbium-doped optical fiber, a second erbium-doped optical fiber, an absorbing erbium-doped optical fiber and at least two pumping lasers, the first erbium-doped optical fiber, the second erbium-doped optical fiber and the absorbing erbium-doped optical fiber being sequentially arranged in this order, and the at least two pumping lasers providing pumping light; wherein the first erbium-doped optical fiber and the second erbium-doped optical fiber both are injected with forward pumping light and backward pumping light, and the absorbing erbium-doped fiber is arranged downstream of the second erbium-doped optical fiber to absorb amplified spontaneous emission (ASE) generated in the amplifier. In the present invention, bidirectional pumping is applied in the first and last erbium-doped fibers in the optical path, and an erbium-doped optical fiber that has no pumping injection is added to absorb the ASE. Thus, the pumping conversion efficiency is greatly improved, the nonlinear four-wave mixing effect is reduced, and the problem that the L-band optical fiber amplifier has a high noise when utilizing the backward pumping is solved. Meanwhile, the noise figure and the manufacturing cost of the amplifier are reduced.
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公开(公告)号：US20230336267A1
公开(公告)日：2023-10-19
申请号：US18027090
申请日：2020-12-08
发明人： Zhi CHEN , Li XIAO , Qinlian BU , Chunping YU , Weiqing ZHANG
IPC分类号： H04J14/02
CPC分类号： H04J14/0221
摘要： An optical signal adjusting apparatus, device and method, and storage medium. The optical signal adjusting apparatus (1) includes a differential operation circuit (11), a feedforward amplification circuit (12) and a control circuit (13), wherein input ends of control circuit (13) are respectively connected to an output end of the differential operation circuit (11) and an output end of the feedforward amplification circuit (12); the differential operation circuit (11) is configured to perform a differential operation on an input optical signal and an output optical signal, to obtain a differential value; the feedforward amplification circuit (12) is configured to perform feedforward amplification on the input optical signal, to obtain a feedforward value; and the control circuit (13) is configured to receive the differential value and the feedforward value, and adjusts the output optical signal according to the differential value and the feedforward value, to obtain an adjusted output optical signal.
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