公开(公告)号：EP0944190A2

公开(公告)日：1999-09-22

申请号：EP99104026.2

申请日：1999-03-15

申请人： FUJITSU LIMITED

发明人： Inagaki, Shinya ,  Shukunami, Norifumi, c/o FUJITSU HOKKAIDO DIGITAL ,  Kinoshita, Susumu ,  Itoh, Hiroyuki, FUJITSU HOKKAIDO DIGITAL TECHN.LTD ,  Kobayashi, Taiki

IPC分类号： H04B10/17

CPC分类号： H04B10/2942 ,  H01S3/06758 ,  H01S3/1301 ,  H01S3/1305 ,  H04B10/2912 ,  H04B10/2941 ,  H04B2210/003

摘要： An optical amplification device which includes first and second optical amplifiers, and a controller. The first optical amplifier receives a light and amplifies the received light. The second optical amplifier receives the light amplified by the first optical amplifier, and amplifies the received light. When a level of the light received by the first optical amplifier changes by Δ, the controller controls a level of the light received by the second optical amplifier to change by approximately -Δ. In various embodiments, the controller causes the sum of the gains of the first and second optical amplifiers to be constant. In other embodiments, the optical amplification device includes first and second optical amplifier and a gain adjustor. The gain adjustor detects a deviation in gain of the first optical amplifier from a target gain, and adjusts the gain of the second optical amplifier to compensate for the detected deviation.

摘要翻译： 一种包括第一和第二光放大器的光放大装置，以及控制器。 第一光放大器接收光并放大所接收的光。 第二光放大器接收由第一光放大器放大的光并放大所接收的光。 当由第一光放大器接收的光的电平改变为DELTA时，控制器控制由第二光放大器接收的光的电平改变大约-ΔTA。 在各种实施例中，控制器使得第一和第二光学放大器的增益之和恒定。 在其他实施例中，光放大装置包括第一和第二光放大器和增益调节器。 增益调节器检测第一光放大器的增益偏离目标增益，并调整第二光放大器的增益以补偿检测到的偏差。

公开(公告)号：EP0944189A2

公开(公告)日：1999-09-22

申请号：EP99102825.9

申请日：1999-02-26

申请人： FUJITSU LIMITED

发明人： Kinoshita, Susumu ,  Onaka, Miki, c/o Fujitsu Limited ,  Sugaya, Yasushi ,  Ohshima, Chihiro ,  Chikama, Terumi ,  Itou, Hiroyuki, c/o Fujitsu Hokkaido Digital ,  Okiyama, Tadashi ,  Kobayashi, Taiki

IPC分类号： H04B10/17 ,  H04J14/02 ,  H01S3/06

CPC分类号： H04B10/2941 ,  H01S3/06758 ,  H04B2210/003 ,  H04J14/0221

摘要： An optical amplifier of a wavelength-division multiplexing transmission system that includes a pre-stage optical amplifying unit and a post stage optical amplifying unit. The pre-stage optical amplifying unit has a rare-earth element doped optical fiber (EDF 1) and a pump light source (LD 1 - 3) for inputting a pump light to the rare-earth element doped optical fiber (EDF 1). The post-stage optical amplifying unit has a second rare-earth element doped optical fiber (EDF 2-1, EDF 2-2) and a pump light source (LD 4 - 12) for inputting a pump light to the second rare-earth element doped optical fiber (EDF 2-1). The pre-stage optical amplifying unit and the post-stage optical amplifying unit are optically connected by a detachable optical coupling device. In addition a gain equalizing unit (GEQ 1, GEQ 2), positioned on an output side of the optical fibers, compensates for wavelength-dependency of a gain characteristic of the optical fibers.

摘要翻译： 一种波分复用传输系统的光放大器，其包括前级光放大单元和后级光放大单元。 前级光放大单元具有稀土元素掺杂光纤（EDF 1）和用于将泵浦光输入到稀土元素掺杂光纤（EDF 1）的泵浦光源（LD 1-3）。 后级光放大单元具有第二稀土元素掺杂光纤（EDF 2-1，EDF 2-2）和泵浦光源（LD 4-12），用于将泵浦光输入到第二稀土元素 掺杂元素的光纤（EDF 2-1）。 前级光放大单元和后级光放大单元通过可拆卸的光耦合装置光学连接。 另外，位于光纤输出侧的增益均衡单元（GEQ 1，GEQ 2）补偿了光纤增益特性的波长依赖性。