发明授权
- 专利标题： Optical transmission system for substantially equalizing the output signal level among frequency bands and substantially lowering the signal-to-noise ratio
- 专利标题（中）： 光传输系统，用于使频带之间的输出信号电平基本均衡，并显着降低信噪比
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申请号： US11507254申请日： 2006-08-21
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公开(公告)号： US07272325B2公开(公告)日： 2007-09-18
- 发明人: Tetsuya Uda , Hiroshi Masuda , Hirofumi Nakano , Eita Miyasaka , Satoshi Asamizu
- 申请人： Tetsuya Uda , Hiroshi Masuda , Hirofumi Nakano , Eita Miyasaka , Satoshi Asamizu
- 申请人地址： JP Tokyo
- 专利权人： Hitachi, Ltd.
- 当前专利权人： Hitachi, Ltd.
- 当前专利权人地址： JP Tokyo
- 代理机构： Knoble Yoshida & Dunleavy, LLC
- 优先权： JP2001-167609 20010604
- 主分类号： H04B10/00
- IPC分类号： H04B10/00 ; H04J14/02
摘要：
In the WDM systems, the OSNR and the signal loss among the optical signals are substantially minimized at the receiving terminal to combat the SRS effects. An equal amount of the signal loss is expected for every span in the transmission path so that the optical amplifier gain tilt is not affected among a number of wavelength frequencies in the optical signal. This is accomplished by controlling the amplification process according to a feedback from the monitoring units for monitoring the optical signal.