发明名称 |
Apparatus and method for reducing SPM/GVD in optical systems |
摘要 |
<p>An optical transmission system and method for reducing non-linear distortion caused by the interaction of Self-Phase Modulation and Group Velocity Dispersion is disclosed. An optical link includes a transmitter for providing signals at a first optical wavelength, a transponder for converting the first optical wavelength to a second optical wavelength, a plurality of spans of optical transmission fiber and optical fiber amplifiers, a dispersion compensating device, and a receiver. The system operates at a relatively high input power level. The transponder includes a device for smoothing edges of the rise and fall times of optical pulses, such as an electrical attenuator (38) and low pass filter (46) so that sharp-edged pulses received from the transmitter are transformed to a Gaussian shape. A dispersion compensating device (48) such as an optical fiber grating, also helps to improve the bit error rate as a function of receiver sensitivity despite an overall link length less than 600km. <IMAGE></p> |
申请公布号 |
EP0963066(A1) |
申请公布日期 |
1999.12.08 |
申请号 |
EP19990109712 |
申请日期 |
1999.05.17 |
申请人 |
PIRELLI CAVI E SISTEMI S.P.A. |
发明人 |
BONATO, GIANLUCA;MACCHI, MAURO;OTTOLENGHI, PAOLO |
分类号 |
H04B10/2513;H04B10/2519;H04B10/255;(IPC1-7):H04B10/18;H04B10/16 |
主分类号 |
H04B10/2513 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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