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1. 发明授权

US06310993B1 Method and apparatus for chromatic dispersion compensation and dispersion slope compensation in wavelength division multiplexed systems utilizing a channel separator and virtually imaged phased arrays 失效
标题翻译：用于使用信道分离器和实际成像的相控阵列的波分复用系统中的色散补偿和色散斜率补偿的方法和装置
公开(公告)号：US06310993B1
公开(公告)日：2001-10-30
申请号：US09470949
申请日：1999-12-22
申请人： Simon X. F. Cao , Xiaoping “Charles” Mao , Guohua Xiao
发明人： Simon X. F. Cao , Xiaoping “Charles” Mao , Guohua Xiao
IPC分类号： G02B628
CPC分类号： G02B6/29358 , G02B6/29349 , G02B6/29394 , H04B10/25137
摘要： The present invention provides a method and apparatus for an improved chromatic dispersion compensator. In an apparatus aspect, the present invention includes a channel separator for separating a wavelength division multiplexed light comprising a plurality of channels, the plurality of channels containing undesired chromatic dispersion and dispersion slope; and a plurality of partial-channel-set dispersion compensation devices optically coupled to the channel separator in a cascade arrangement, wherein each partial-channel-set dispersion compensation device includes: a virtually imaged phased array (VIPA) optically coupled to the channel separator, and a light returning device optically coupled to the VIPA, wherein a combination of the VIPA and the light returning device compensates for the undesired chromatic dispersion and dispersion slope by propagating each wavelength of the plurality of channels along a different path length. The controlled difference between the periodicity of each VIPA's group delay response and the periodicity of the channel spacing causes the light of each channel input to the VIPA to acquire a different value of chromatic dispersion from that of every other channel input to the same VIPA, which is utilized so as to compensate dispersion slope. Advantages in using this chromatic dispersion compensator includes tunability, adaptability to various fiber types or optical transmission regions with either positive or negative dispersion, smaller size and lower cost. Also, the present invention provides the capability of simultaneously providing different values of dispersion compensation to different channels, i.e., it is capable of correcting for dispersion slope.
摘要翻译：本发明提供一种改进色散补偿器的方法和装置。在装置方面，本发明包括用于分离包括多个信道的波分复用光的信道分离器，所述多个信道包含不期望的色散和色散斜率; 以及多个部分信道集色散补偿装置，其以级联布置光耦合到信道分离器，其中每个部分信道集色散补偿装置包括：光学耦合到信道分离器的虚拟成像的相控阵列（VIPA）以及光学耦合到VIPA的光返回装置，其中VIPA和光返回装置的组合通过沿着不同的路径长度传播多个通道的每个波长来补偿不期望的色散和色散斜率。每个VIPA的组延迟响应的周期性和信道间隔的周期性之间的受控差异导致输入到VIPA的每个信道的光获得与输入到相同VIPA的每个其他信道的色散不同的色散值，其中，以补偿色散斜率。使用这种色散补偿器的优点包括可调谐性，对各种光纤类型的适应性或具有正或负色散的光传输区域，更小的尺寸和更低的成本。此外，本发明提供了同时向不同的信道提供不同的色散补偿值的能力，即它能够校正色散斜率。

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