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1. 发明授权

US06434310B1 Single mode optical waveguide fiber with reduced dispersion 失效
标题翻译：具有降低色散的单模光纤光纤
公开(公告)号：US06434310B1
公开(公告)日：2002-08-13
申请号：US09974532
申请日：2001-10-09
申请人： Yanming Liu , Shiva Kumar
发明人： Yanming Liu , Shiva Kumar
IPC分类号： G02B616
CPC分类号： G02B6/03644 , G02B6/02014 , G02B6/02242 , G02B6/02266 , G02B6/0281 , G02B6/03611
摘要： A single mode optical waveguide fiber having a relatively large effective area and low dispersion includes a segmented core having at least two segments each defining a radius, a refractive index profile and a relative refractive index percent. The waveguide fiber also includes a clad layer surrounding and in contact with the core and having a relative refractive index. The refractive index profiles are selected to provide total dispersion at a wavelength of about 1550 nm of within the range of about 11 ps/nm-km to about 14 ps/nm-km, and total dispersion slope at a wavelength of about 1550 nm of within the range of about 0.045 ps/nm2-km to about 0.055 ps/nm2-km. The refractive index profiles are further selected to provide an effective area greater than or equal to 60 &mgr;m2, and attenuation at a wavelength of about 1550 nm of less than or equal to 0.22 dB/km.
摘要翻译：具有相对较大的有效面积和低色散的单模光纤光纤包括具有至少两个段的分段芯，每个段限定半径，折射率分布和相对折射率百分比。波导纤维还包括围绕并与芯接触并具有相对折射率的包覆层。选择折射率分布以在约1550nm的波长处提供在约11ps / nm-km至约14ps / nm-km的范围内的总色散，并且在约1550nm的波长处的总色散斜率在约0.045ps / nm 2-km至约0.055ps / nm 2-km的范围内。进一步选择折射率分布以提供大于或等于60mum2的有效面积，以及在约1550nm的波长处的衰减小于或等于0.22dB / km。

2. 发明授权

US07027735B2 Unequal pulse spacer 有权
标题翻译：不等脉冲间隔
公开(公告)号：US07027735B2
公开(公告)日：2006-04-11
申请号：US10115699
申请日：2002-04-03
申请人： Shiva Kumar
发明人： Shiva Kumar
IPC分类号： H04J14/02
CPC分类号： H04B10/2563 , H04J14/08
摘要： For suppressing intra-channel four wave mixing in a time division multiplexing (TDM) system, where N synchronous data streams, each having a reduced data pulse width within a bit slot timing interval, from parallel to serial form, are converted for optically bit interleaving the N synchronous data streams into the optical communication link at a nominal bit slot delay between sequential N synchronous data streams related to the bit slot timing interval to provide a serial data sequence of short optical pulses having an equal bit slot delay between sequential pulses, a sequential bit slot delay is varied between two of the short optical pulses to provide an unequal bit slot delay between sequential pulses within the serial data sequence of short optical pulses for suppression of undesired intra-channel four-wave mixing pulses among the pulses and thereby, improvement of transmission performance.
摘要翻译：为了抑制在时分复用（TDM）系统中的信道内四波混频，其中每个在比特时隙定时间隔内具有减少的数据脉冲宽度的并行到串行形式的N个同步数据流被转换为光学比特交织 N个同步数据流以与比特时隙定时间隔相关的连续N个同步数据流之间的标称位时隙延迟进入光通信链路，以提供在顺序脉冲之间具有相等位时隙延迟的短光脉冲的串行数据序列，顺序位时隙延迟在两个短光脉冲之间变化，以在短光脉冲的串行数据序列内的顺序脉冲之间提供不相等的位时隙延迟，用于抑制脉冲之间不期望的通道内四波混频脉冲，传输性能的提高。

3. 发明授权

US06671445B2 Dispersion slope compensating optical fiber 失效
公开(公告)号：US06671445B2
公开(公告)日：2003-12-30
申请号：US09870432
申请日：2001-05-30
申请人： Scott R. Bickham , Michael B. Cain , Shiva Kumar , Snigdharaj K. Mishra , V. Srikant , Jeffery S. Stone
发明人： Scott R. Bickham , Michael B. Cain , Shiva Kumar , Snigdharaj K. Mishra , V. Srikant , Jeffery S. Stone
IPC分类号： G02B602
CPC分类号： G02B6/03677 , G02B6/02009 , G02B6/02019 , G02B6/02242 , G02B6/02261 , G02B6/02285 , G02B6/0281 , G02B6/0286
摘要： Disclosed are refractive index profiles for total dispersion compensating optical waveguide fibers for use in high data rate, long length telecommunications systems. The optical waveguide fibers in accord with the invention provide substantially equal compensation of total dispersion over a range of wavelengths, thus facilitating wavelength division multiplexed systems. Also disclosed are spans of optical waveguide fiber that include a length of transmission fiber together with a length of the compensating fiber. The spans are joined end to end in series arrangement to form the optical waveguide fiber part of a telecommunication system.

4. 发明授权

US07016583B2 Dispersion management with phase conjugation 失效
标题翻译：相位共轭色散管理
公开(公告)号：US07016583B2
公开(公告)日：2006-03-21
申请号：US10736821
申请日：2003-12-15
申请人： John D. Downie , James M. Grochocinski , Shiva Kumar
发明人： John D. Downie , James M. Grochocinski , Shiva Kumar
IPC分类号： G02B6/02 , G02B6/26
CPC分类号： G02B6/29374 , H04B10/2531
摘要： An optical transmission system is provided. The system includes first and second lines of optical fiber, each line including first, second, and third optical fiber portions, and an optical phase conjugator optically coupling the first and second lines. The first and third optical fiber portions have a local dispersion of like sign to each other, and opposite to the sign of the second optical fiber portion.
摘要翻译：提供光传输系统。该系统包括第一和第二光纤线，每条线包括第一，第二和第三光纤部分，以及光学相位共轭器，光耦合第一和第二线。第一和第三光纤部分具有相同符号的局部色散，并且与第二光纤部分的符号相反。

5. 发明授权

US07076172B2 Waveguide fiber for noise suppression 失效
标题翻译：用于噪声抑制的波导光纤
公开(公告)号：US07076172B2
公开(公告)日：2006-07-11
申请号：US10192188
申请日：2002-07-09
申请人： Shiva Kumar
发明人： Shiva Kumar
IPC分类号： H04B10/12
CPC分类号： H04B10/2507
摘要： An optical waveguide system exhibiting reduced noise includes a varying dispersion optical waveguide fiber and a high frequency electrical filter. The varying dispersion fiber shifts the frequency spectrum of the noise relative to that of the signal so that the noise can be filtered with substantially no effect on the signal. The varying dispersion fiber is a passive component of the optical system and is compatible with optical connecting and splicing.
摘要翻译：显示出降低噪声的光波导系统包括变化色散光波导光纤和高频电滤波器。变化的色散光纤相对于信号的频谱偏移，使得可以对信号基本上没有影响来对噪声进行滤波。不同色散光纤是光学系统的无源元件，与光学连接和拼接兼容。

6. 发明授权

US06952519B2 Large effective area high SBS threshold optical fiber 有权
标题翻译：大有效面积高SBS阈值光纤
公开(公告)号：US06952519B2
公开(公告)日：2005-10-04
申请号：US10818054
申请日：2004-04-05
申请人： Scott R. Bickham , Dipakbin Q. Chowdhury , Madison L. Howard , Shiva Kumar , Daiping Ma , Snigdharaj K. Mishra , A. Boh Ruffin , Sergey Y. Ten
发明人： Scott R. Bickham , Dipakbin Q. Chowdhury , Madison L. Howard , Shiva Kumar , Daiping Ma , Snigdharaj K. Mishra , A. Boh Ruffin , Sergey Y. Ten
IPC分类号： G02B6/028 , G02B6/036 , H01S3/30 , G02B6/00 , G02B6/02
CPC分类号： G02B6/03666 , G02B6/02014 , G02B6/02242 , G02B6/02266 , G02B6/03611 , G02B6/03633 , G02B6/03638 , G02B6/03644 , G02B6/29377 , H01S3/302
摘要： An optical waveguide fiber having a high threshold for stimulated Brillouin scattering. The optical fiber preferably has large optical effective area, and further preferably has a low zero dispersion wavelength.
摘要翻译：具有用于受激布里渊散射的高阈值的光波导光纤。光纤优选具有大的光学有效面积，进一步优选具有低的零色散波长。

7. 发明授权

US06430346B1 Negative dispersion single mode waveguide fiber 失效
标题翻译：负色散单模光纤
公开(公告)号：US06430346B1
公开(公告)日：2002-08-06
申请号：US09626632
申请日：2000-07-27
申请人： Jan Conradi , Shiva Kumar , Steven S. Rosenblum
发明人： Jan Conradi , Shiva Kumar , Steven S. Rosenblum
IPC分类号： G02B602
CPC分类号： G02B6/03644 , G02B6/02009 , G02B6/02014 , G02B6/02252 , G02B6/02257 , G02B6/02261 , G02B6/0228 , G02B6/0286 , G02B6/03611 , G02B6/03633 , G02B6/03688 , G02B6/29377
摘要： Disclosed is a negative total dispersion waveguide fiber having low attenuation and sufficiently good resistance to bend loss that attenuation is not impacted by cabling or otherwise buffering the waveguide. The total dispersion slope of the waveguide fiber is positive so that the zero dispersion wavelength is greater than 1600 nm. The waveguide fiber may advantageously be used in a link having a distributed feedback laser as a signal source. The negative dispersion of the waveguide in accordance with the invention compresses the launched signal pulse when the laser is positively chirped. The laser is operated at optimum bias, which results in positive chirp, but no dispersion penalty is incurred in the link. The waveguide fiber in accordance with the invention may also be advantageously used as a dispersion compensating fiber in a high performance multiplexed telecommunications link.
摘要翻译：公开了具有低衰减和足够好的抗弯曲损耗的负总色散波导光纤，其衰减不受布线或其它方式缓冲波导的影响。波导纤维的总色散斜率为正，使得零色散波长大于1600nm。波导光纤可以有利地用于具有分布反馈激光器作为信号源的链路中。当激光被正啁啾时，根据本发明的波导的负色散压缩所发射的信号脉冲。激光器以最佳偏压运行，这导致正线性调频脉冲，但在链路中不会产生分散损失。根据本发明的波导光纤还可以有利地用作高性能复用电信链路中的色散补偿光纤。

8. 发明授权

US06611648B2 Optical fibers having cores with different propagation constants, and methods of manufacturing same 失效
公开(公告)号：US06611648B2
公开(公告)日：2003-08-26
申请号：US09852173
申请日：2001-05-09
申请人： Shiva Kumar , Upendra H. Manyam , Vaidyanathan Srikant
发明人： Shiva Kumar , Upendra H. Manyam , Vaidyanathan Srikant
IPC分类号： G02B602
CPC分类号： G02B6/02042 , C03B37/01222 , C03B37/01493 , C03B2203/34 , G02B6/02395
摘要： Multi-core optical fibers are provided in various embodiments of the present invention which include a plurality of cores. At least two cores of the plurality of cores have different associated mean propagation constants at a reference wavelength. The difference between the associated mean propagation constants may be selected to reduce cross-talk between the at least two cores as compared to cores having a same associated mean propagation constant. A primary coating of light absorbing material may be positioned between the cores to further reduce cross-talk. Also provided are methods for manufacturing the same and wavelength division multiplexing systems using the same.

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