公开(公告)号：US06404950B1

公开(公告)日：2002-06-11

申请号：US09452103

申请日：1999-12-02

申请人： Masao Tsukitani ,  Eisuke Sasaoka ,  Toshiaki Okuno ,  Shigeru Tanaka

发明人： Masao Tsukitani ,  Eisuke Sasaoka ,  Toshiaki Okuno ,  Shigeru Tanaka

IPC分类号： G02B626

CPC分类号： G02B6/29377 ,  G02B6/2551 ,  G02B6/29317 ,  G02B6/29394

摘要： The present invention relates to a dispersion-compensating module having a structure which compensates for the dispersion of an optical transmission line in a 1.55-&mgr;m wavelength band and adjusts loss fluctuations among signal wavelengths in the 1.55-&mgr;m wavelength band into an appropriate range. The dispersion-compensating module comprises a structure adapted to be installed in an already installed optical fiber transmission line, and has a loss slope with a polarity opposite to that of the optical fiber transmission line in the 1.55-&mgr;m wavelength band. One application of the dispersion-compensating module comprises a dispersion-compensating optical fiber as a dispersion-compensating device, and an optical fiber doped with a transition metal element as a loss-equalizing device. By the above configuration, the loss fluctuations among individual signal wavelengths in the whole transmission line including the dispersion-compensating module can be adjusted by the loss-equalizing device in the dispersion-compensating module so as to fail within an appropriate range.

摘要翻译： 本发明涉及一种具有补偿光传输线在1.55μm波长带中的色散的结构的色散补偿模块，并将1.55μm波长带中的信号波长之间的损耗波动调整到适当的范围内。 色散补偿模块包括适于安装在已经安装的光纤传输线中的结构，并且在1.55μm波长带中具有与光纤传输线的极性相反的损耗斜率。 色散补偿模块的一个应用包括作为色散补偿装置的色散补偿光纤和掺杂有过渡金属元素作为损耗均衡装置的光纤。 通过上述配置，可以通过色散补偿模块中的损耗均衡装置来调整包括色散补偿模块的整个传输线中各个信号波长之间的损耗波动，从而在适当的范围内失败。

公开(公告)号：US06181858B2

公开(公告)日：2001-01-30

申请号：US09022033

申请日：1998-02-11

申请人： Takatoshi Kato ,  Toshiaki Okuno ,  Eisuke Sasaoka

发明人： Takatoshi Kato ,  Toshiaki Okuno ,  Eisuke Sasaoka

IPC分类号： G02B616

CPC分类号： G02B6/03644 ,  G02B6/02014 ,  G02B6/02242 ,  G02B6/03611 ,  G02B6/03627

摘要： The present invention provides a dispersion-shifted fiber which can effectively restrain nonlinear optical effects from occurring and is suitable for long-haul transmission. As characteristics at a wavelength of 1,550 nm, this dispersion-shifted fiber has a dispersion whose absolute value is from 1.0 to 4.5 ps/nm/km, an effective core cross-sectional area of at least 70 &mgr;m2, a cutoff wavelength of at least 1,300 nm at a fiber length of 2 m, and a dispersion slope of 0.05 to 0.09 ps/nm2/km. Also, in this dispersion-shifted fiber, the position where the optical power distribution in the fundamental mode of the signal light is maximized is radially separated from the center of the core region by a predetermined distance, and, when the optical power in the fundamental mode of signal light at the center of core region is P0, and the maximum value of the optical power distribution in the fundamental mode is P1, the maximum value P1 is greater than the value of 1.2 times the optical power P0 at the center of core region.

摘要翻译： 本发明提供一种可以有效地抑制非线性光学效应发生并适合长距离传输的色散位移光纤。 作为波长为1,550nm的特性，该色散位移光纤的绝对值为1.0〜4.5ps / nm / km，有效芯截面积为70μm2以上，截止波长至少为 纤维长度为2μm的1,300nm，色散斜率为0.05〜0.09ps / nm 2 / km。 此外，在这种色散位移光纤中，信号光的基模中的光功率分布最大的位置与芯区的中心径向分开预定的距离，并且当基波中的光功率 核心区域中心的信号光模式为P0，基模光功率分布的最大值为P1，最大值P1大于核心中心光功率P0的1.2倍 地区。