公开(公告)号：US06396606B1

公开(公告)日：2002-05-28

申请号：US09220732

申请日：1998-12-24

Applicant: Xiaoping Charles Mao

Inventor： Xiaoping Charles Mao

IPC: H04B1000

CPC classification number: H04B10/2569

Abstract: A method and apparatus for managing state-of-polarization (SOP) controllers along an optical communications link. When the polarization-mode dispersion (PMD) in the link exceeds a preset limit as determined by a PMD compensator, the SOP controller is directed to change rotation angle in an arbitrary fashion. This shift is only undertaken after other indicators are examined to determine that PMD is the main problem affecting the link, and not simply a consequence of a separate problem that the SOP controller rotation angle should not try to fix. By reducing unnecessary SOP adjustments which can disrupt data traffic, the reliability of the optical link is improved.

Abstract translation: 一种用于沿光通信链路管理偏振态（SOP）控制器的方法和装置。 当链路中的偏振模色散（PMD）超过由PMD补偿器确定的预设极限时，SOP控制器被以任意方式改变旋转角度。 这种转变仅在其他指标被检查以确定PMD是影响链路的主要问题之后进行，而不仅仅是SOP控制器旋转角度不应该修复的单独问题的结果。 通过减少可能中断数据流量的不必要的SOP调整，提高了光链路的可靠性。

公开(公告)号：US06310993B1

公开(公告)日：2001-10-30

申请号：US09470949

申请日：1999-12-22

Applicant: Simon X. F. Cao ,  Xiaoping “Charles” Mao ,  Guohua Xiao

Inventor： Simon X. F. Cao ,  Xiaoping “Charles” Mao ,  Guohua Xiao

IPC: G02B628

CPC classification number: G02B6/29358 ,  G02B6/29349 ,  G02B6/29394 ,  H04B10/25137

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US5689594A

公开(公告)日：1997-11-18

申请号：US769201

申请日：1996-12-18

Applicant: Xiaoping Charles Mao

Inventor： Xiaoping Charles Mao

IPC: H04B10/08 ,  H04B10/17 ,  H04B10/24 ,  H04J14/02 ,  G02B6/28

CPC classification number: H04B10/2971 ,  H04B10/077 ,  H04B10/07955 ,  H04B10/2503 ,  H04B10/2912 ,  H04J14/0221

Abstract: A system and method for optimizing the performance, in a multichannel optical transmission system, of an optical signal regenerator, by compensating for input signal power fluctuation and for output signal gain change, and by mildly filtering individual wavelengths between gain block stages. A system and method to provide amplification and refinement of a bidirectional optical signal in a single amplification and refinement stage.

Abstract translation: 一种用于通过补偿输入信号功率波动和输出信号增益变化以及通过在增益块级之间轻微过滤各个波长来优化光信号再生器在多通道光传输系统中的性能的系统和方法。 一种用于在单个放大和细化阶段中提供双向光信号的放大和细化的系统和方法。

公开(公告)号：US06704510B2

公开(公告)日：2004-03-09

申请号：US09993644

申请日：2001-11-27

Applicant: Andrew Niall Robinson ,  Xiaoping Charles Mao

Inventor： Andrew Niall Robinson ,  Xiaoping Charles Mao

IPC: H04J1402

CPC classification number: H04B10/2569

Abstract: A fiber optic communications link having PMD characterization across multiple optical channels to identify PMD problems. The communications link has adaptive PMD controls employed along the optical link, whereby PMD phenomena detected by instruments, such as PMD compensators, are interpreted as being either attributable to perturbation of fiber characteristics at large, or by failure of PMD equipment along the link. The present invention avoids taking unnecessary control or maintenance actions upon PMD related controllers and compensators. PMD notifications from various PMD compensators are correlated to identify which portion of the link has undergone a change in polarization characteristics to further identify PMD related errors and problems.

Abstract translation: 一种光纤通信链路，其具有跨多个光信道的PMD表征以识别PMD问题。 通信链路具有沿着光学链路采用的自适应PMD控制，由PMD补偿器等仪器检测到的PMD现象被解释为可能归因于光纤特性的大幅度扰动，或者是沿着链路的PMD设备的故障。 本发明避免了对PMD相关控制器和补偿器的不必要的控制或维护动作。 来自各种PMD补偿器的PMD通知被相关联以识别链路的哪个部分已经经历了偏振特性的变化，以进一步识别PMD相关的误差和问题。

公开(公告)号：US06681081B2

公开(公告)日：2004-01-20

申请号：US10093638

申请日：2002-03-11

Applicant: Xiaoping Charles Mao

Inventor： Xiaoping Charles Mao

IPC: H04B1000

CPC classification number: H04B10/2569

Abstract: A method and apparatus for managing state-of-polarization (SOP) controllers along an optical communications link. When the polarization-mode dispersion (PMD) in the link exceeds a preset limit as determined by a PMD compensator, the SOP controller is directed to change rotation angle in an arbitrary fashion. This shift is only undertaken after other indicators are examined to determine that PMD is the main problem affecting the link, and not simply a consequence of a separate problem that the SOP controller rotation angle should not try to fix. By reducing unnecessary SOP adjustments which can disrupt data traffic, the reliability of the optical link is improved.

Abstract translation: 一种用于沿光通信链路管理偏振态（SOP）控制器的方法和装置。 当链路中的偏振模色散（PMD）超过由PMD补偿器确定的预设极限时，SOP控制器被以任意方式改变旋转角度。 这种转变仅在其他指标被检查以确定PMD是影响链路的主要问题之后进行，而不仅仅是SOP控制器旋转角度不应该修复的单独问题的结果。 通过减少可能中断数据流量的不必要的SOP调整，提高了光链路的可靠性。

公开(公告)号：US06493116B1

公开(公告)日：2002-12-10

申请号：US09248521

申请日：1999-02-09

Applicant: Andrew Niall Robinson ,  Xiaoping Charles Mao

Inventor： Andrew Niall Robinson ,  Xiaoping Charles Mao

IPC: H04B1008

CPC classification number: H04B10/2569

Abstract: A fiber optic communications link having PMD characterization across multiple optical channels to identify PMD problems. The communications link has adaptive PMD controls employed along the optical link, whereby PMD phenomena detected by instruments, such as PMD compensators, are interpreted as being either attributable to perturbation of fiber characteristics at large, or by failure of PMD equipment along the link. The present invention avoids taking unnecessary control or maintenance actions upon PMD related controllers and compensators. PMD notifications from various PMD compensators are correlated to identify which portion of the link has undergone a change in polarization characteristics to further identify PMD related errors and problems.

Abstract translation: 一种光纤通信链路，其具有跨多个光信道的PMD表征以识别PMD问题。 通信链路具有沿着光学链路采用的自适应PMD控制，由PMD补偿器等仪器检测到的PMD现象被解释为可能归因于光纤特性的大幅度扰动，或者是沿着链路的PMD设备的故障。 本发明避免了对PMD相关控制器和补偿器的不必要的控制或维护动作。 来自各种PMD补偿器的PMD通知被相关联以识别链路的哪个部分已经经历了偏振特性的变化，以进一步识别PMD相关的误差和问题。

公开(公告)号：US6043914A

公开(公告)日：2000-03-28

申请号：US106725

申请日：1998-06-29

Applicant: Joseph C. Cook ,  Xiaoping Charles Mao

Inventor： Joseph C. Cook ,  Xiaoping Charles Mao

IPC: H04B10/18 ,  H04J14/02

CPC classification number: H04B10/2513 ,  H04B10/25133 ,  H04J14/02 ,  H04B2210/258 ,  H04J14/0224

Abstract: Dense wavelength division multiplexing within a 1310 nm band is accomplished over a single mode fiber. Carrier wavelengths are selected from within two windows, a low subband and/or a high subband, on either side of a guardband. The guardband includes the zero dispersion wavelength .lambda..sub.0 of a single-mode fiber in the optical communication link and separates low subband and high subband within the 1310 nm band. Dispersion compensation is provided for carrier signals in each dense WDM channel in the low and high subbands.

Abstract translation: 在1310nm波段内的密集波分复用通过单模光纤实现。 载波波长从保护带两侧的两个窗口内选择，一个低子带和/或一个高子带。 保护带包括光通信链路中的单模光纤的零色散波长λ0，并且在1310nm波段内分离低子带和高子带。 在低和高子带中的每个密集WDM信道中为载波信号提供色散补偿。

公开(公告)号：US5926590A

公开(公告)日：1999-07-20

申请号：US947678

申请日：1997-10-24

Applicant: Xiaoping Charles Mao

Inventor： Xiaoping Charles Mao

IPC: G02F1/01 ,  G02B6/293 ,  H01S3/06 ,  H01S3/10 ,  H04B10/08 ,  H04B10/16 ,  H04B10/17 ,  H04B10/24 ,  H04J14/00 ,  H04J14/02 ,  G02B6/28

CPC classification number: H04B10/2971 ,  H04B10/077 ,  H04B10/07955 ,  H04B10/2503 ,  H04B10/2912 ,  H04J14/0221

Abstract: A system and method for optimizing the performance, in a multichannel optical transmission system, of an optical signal regenerator, by compensating for input signal power fluctuation and for output signal gain change, and by mildly filtering individual wavelengths between gain block stages. A system and method to provide amplification and refinement of a bidirectional optical signal in a single amplification and refinement stage.

Abstract translation: 一种用于通过补偿输入信号功率波动和输出信号增益变化以及通过在增益块级之间轻微过滤各个波长来优化光信号再生器在多通道光传输系统中的性能的系统和方法。 一种用于在单个放大和细化阶段中提供双向光信号的放大和细化的系统和方法。