发明名称 |
OPTISCHE ÜBERTRAGUNGSVERBINDUNG MIT EINEM FASER MIT GERINGER DISPERIONSSTEILHEIT UND RAMAN-VERSTÄRKUNG |
摘要 |
An optical fiber transmission link has a first optical fiber with a high effective area coupled to a second, downstream optical fiber with a low effective area. The downstream fiber has non-zero dispersion and low dispersion slope. Characteristics of the upstream fiber permit the launching of high power channels in a wavelength division multiplexing, and characteristics of the downstream fiber enable Raman amplification along that fiber to extend the transmission distance before a need for discrete amplification. The downstream fiber has a non-zero dispersion in the C-band wavelengths and a low dispersion slope and has low attenuation at the signal and pump wavelengths. Refractive-index profiles include variations of W-type fibers that may include outer rings of positive or negative index. Pumping of the downstream fiber may occur either co-directionally to the signals, counter-directionally to the signals, or in both directions. |
申请公布号 |
DE60143664(D1) |
申请公布日期 |
2011.01.27 |
申请号 |
DE2001643664 |
申请日期 |
2001.08.22 |
申请人 |
PRYSMIAN S.P.A. |
发明人 |
TIRLONI, BARTOLOMEO ITALO;ROBA, GIACOMO STEFANO |
分类号 |
G02B6/036;H01S3/067;H01S3/094;H01S3/30;H04B10/2525;H04B10/291 |
主分类号 |
G02B6/036 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|