公开(公告)号：US07039269B2

公开(公告)日：2006-05-02

申请号：US10113448

申请日：2002-03-28

申请人： V. Srikant ,  Sergey Y. Ten ,  Jan Conradi

发明人： V. Srikant ,  Sergey Y. Ten ,  Jan Conradi

IPC分类号： G02B6/28

CPC分类号： H04B10/25253

摘要： An optical signal transmission line includes a first fiber adapted to guide an optical signal therethrough and having a first κ, a second fiber adapted to guide the optical signal therethrough and having a second κ of less than or equal to about 100 nm at a wavelength of 1550 nm, and a κ compensating fiber adapted to guide the optical signal therethrough and having a third κ of greater than or equal to about 60 nm at a wavelength of 1550 nm. The first fiber, the second fiber and the κ compensating fiber are in optical communication, thereby defining an optical transmission line having a total dispersion and a total dispersion slope. The first κ, the second κ and the third κ cooperate such that the total dispersion is within the range of about 1.0 ps/nm-km≧total dispersion≧about −1.0 ps/nm-km at a wavelength of 1550 nm, and the total dispersion slope is within the range of about 0.02 ps/nm2-km≧total dispersion slope≧about −0.02 ps/nm2-km at a wavelength of 1550 nm.

摘要翻译： 光信号传输线包括第一光纤，其适于引导光信号通过其中并具有第一卡尔，第二光纤适于通过其引导光信号，并具有小于或等于约100nm的第二卡波长 1550nm，以及适于引导光信号通过其中并具有大于或等于约60nm的第三κ波长的kappa补偿光纤，波长为1550nm。 第一光纤，第二光纤和κ补偿光纤是光通信的，由此限定具有总色散和总色散斜率的光传输线。 第一个kappa，第二个kappa和第三个kappa协调使总色散在波长1550 nm处的约1.0 ps / nm-km> =总色散> =约-1.0 ps / nm-km的范围内， 并且总色散斜率在大约0.02ps / nm 2 -km> =总色散斜率> = -0.02ps / nm 2 -km的范围内在a 波长1550nm。

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。

公开(公告)号：US5880870A

公开(公告)日：1999-03-09

申请号：US738573

申请日：1996-10-28

申请人： Michael J. Sieben ,  Jan Conradi ,  David E. Dodds

发明人： Michael J. Sieben ,  Jan Conradi ,  David E. Dodds

IPC分类号： H04B10/50 ,  G02B6/28 ,  H04B10/60 ,  H04B10/04

CPC分类号： H04B10/5165 ,  G02B6/2861 ,  H04B10/5053 ,  H04B10/58

摘要： Apparatus for generation of broadband vestigial sideband (VSB) signals primarily for transmission over optical fibers in which the carrier frequency is in the infrared portion of the electromagnetic spectrum. The modulating signal is normally a broadband digital signal. The apparatus includes an optical fiber, an optical signal source coupled to a modulator with first and second modulation signals modulating the carrier optical signal, plus a method of adding carrier optical signal to the modulator output optical signal and coupling to an output optical fiber. The modulation signals are selected such that an output optical signal transmitted along the optical fiber from the modulator has a vestigial single sideband. Part of the carrier optical signal is transmitted with the output optical signal through the use of a bypass loop or through an appropriate combination of the first and second modulation signals.

摘要翻译： 用于生成宽带残留边带（VSB）信号的装置，主要用于在载波频率处于电磁频谱的红外部分的光纤上传输。 调制信号通常是宽带数字信号。 该装置包括光纤，耦合到具有调制载波光信号的第一和第二调制信号的调制器的光信号源，以及将载波光信号加到调制器输出光信号并耦合到输出光纤的方法。 选择调制信号，使得沿调制器的光纤传输的输出光信号具有残留的单边带。 载波光信号的一部分通过使用旁路回路或通过第一和第二调制信号的适当组合与输出光信号一起传输。

公开(公告)号：US06304622B1

公开(公告)日：2001-10-16

申请号：US09441602

申请日：1999-11-17

申请人： Jan Conradi ,  Manish Sharma

发明人： Jan Conradi ,  Manish Sharma

IPC分类号： H04L700

CPC分类号： H03L7/07 ,  H04L7/027 ,  H04L7/0337

摘要： A flexible bit rate clock recovery unit is provided for recovering a clock signal from an input data signal, where the input data signal is transmissible at different bit rates. The flexible bit rate clock recovery unit includes a plurality of fixed rate clock recovery units, where each fixed rate clock recovery units is operative at a different bit rate to extract an intermediary clock signal from the input data signal; a comparator for generating an encoded data signal based on an amplitude characteristic of each of the intermediary clock signals, where the encoded data signal is indicative of the clock signal associated with the input data signal; and a selector for selecting one of the intermediary clock signals based on the encoded data signal, thereby recovering the clock signal from the input data signal.

摘要翻译： 提供灵活的比特率时钟恢复单元，用于从输入数据信号中恢复时钟信号，其中输入数据信号以不同的比特率传输。 灵活的比特率时钟恢复单元包括多个固定速率时钟恢复单元，其中每个固定速率时钟恢复单元以不同的比特率操作以从输入数据信号提取中间时钟信号; 比较器，用于基于每个中间时钟信号的幅度特性产生编码数据信号，其中所述编码数据信号指示与所述输入数据信号相关联的时钟信号; 以及选择器，用于基于编码数据信号选择一个中间时钟信号，从而从输入数据信号中恢复时钟信号。

公开(公告)号：US6061369A

公开(公告)日：2000-05-09

申请号：US323723

申请日：1999-06-01

申请人： Jan Conradi

发明人： Jan Conradi

IPC分类号： H01S3/10 ,  H01S3/06 ,  H01S3/067 ,  H01S3/08 ,  H01S3/094 ,  H01S3/23 ,  H04B10/02 ,  H04J14/00 ,  H04J14/02 ,  H01S3/30 ,  H01S3/09

CPC分类号： H01S3/067 ,  H01S3/08086 ,  H01S3/094061 ,  H01S3/09408 ,  H01S3/2383 ,  H01S3/2391

摘要： A fiber laser system including multiple fiber lasers fabricated to emit at respective different wavelengths when optically pumped by radiation at a pump wavelength. A pump laser emits the pump radiation and pumps one or more of the fiber lasers. The outputs of the fiber lasers are recombined onto a transmission fiber, preferably for use in a wavelength-division multiplexing (WDM) telecommunication system. In one set of embodiments, an optical switch switches the pump radiation to only one of the fiber lasers. A second switch controlled in correspondence to the first switch or a passive combiner, preferably a wavelength-division multiplexer, directs the output of the lasing fiber to an optical output path. In another embodiment, the one pump laser simultaneously pumps all the fiber lasers. One or more pump laser may be placed in parallel, and their outputs are combined. The parallel pump lasers may either be individually activated for redundancy or simultaneously operated for higher power.

摘要翻译： 一种光纤激光系统，其包括多个光纤激光器，其被制造为在泵浦波长处通过辐射光泵浦时以各自的不同波长发射。 泵浦激光器发射泵浦辐射并泵送一个或多个光纤激光器。 光纤激光器的输出被重新组合到传输光纤上，优选用于波分复用（WDM）电信系统。 在一组实施例中，光学开关将泵浦辐射切换到仅光纤激光器中的一个。 控制对应于第一开关或无源组合器（优选波分复用器）的第二开关将激光光纤的输出引导到光输出路径。 在另一个实施例中，一个泵浦激光器同时泵送所有的光纤激光器。 一个或多个泵浦激光器可以并联放置，并且它们的输出被组合。 并联泵激光器可以单独激活以实现冗余或同时运行以实现更高功率。

公开(公告)号：US5999300A

公开(公告)日：1999-12-07

申请号：US873967

申请日：1997-06-12

申请人： Robert J. Davies ,  Jan Conradi ,  David E. Dodds

发明人： Robert J. Davies ,  Jan Conradi ,  David E. Dodds

IPC分类号： H04B10/516 ,  G02F1/035 ,  H03C5/00 ,  H04B1/68 ,  H04L27/04 ,  H04B10/04

CPC分类号： H04B10/5165

摘要： Bandwidth reduction methods and apparatus that offset the effects of dispersion on a signal transmitted through an optical fiber. The apparatus and methods employ a generator of modulated optical signals in cascade with a modulator. One of the generator and the modulator may be an optical intensity or amplitude modulator and the other a phase (or frequency) modulator. With the application of specific signals, the cascaded generator and modulator produce an optical signal with reduced energy in one half of the transmission bandwidth. One important benefit in the method is the fact that by exploiting the less obvious spectral characteristics of single sideband signals, a simple modulator design is achieved. All of the designs exploit a method of generating analytic signals via hybrid modulation.

摘要翻译： 抵消色散对通过光纤传输的信号的影响的带宽减小方法和装置。 该装置和方法采用与调制器级联的调制光信号的发生器。 发生器和调制器之一可以是光强度或幅度调制器，另一个是相位（或频率）调制器。 随着特定信号的应用，级联发生器和调制器在传输带宽的一半内产生具有降低能量的光信号。 该方法的一个重要优点是通过利用单边带信号的不太明显的光谱特征，实现了简单的调制器设计。 所有这些设计都利用了通过混合调制产生分析信号的方法。

公开(公告)号：US5943457A

公开(公告)日：1999-08-24

申请号：US47269

申请日：1998-03-24

申请人： Geoffrey Hayward ,  Jan Conradi

发明人： Geoffrey Hayward ,  Jan Conradi

IPC分类号： G02B6/12 ,  G02B6/28 ,  H04J14/02

CPC分类号： G02B6/12007 ,  G02B6/2861

摘要： A signal processing circuit, the signal processing circuit comprising first and second waveguides, a series of successive couplers C.sub.i between the first and second waveguides, the couplers being spaced from each other along the first and second waveguides, the first and second waveguides having a delay differential .DELTA.L.sub.k between successive couplers C.sub.k-1 and C.sub.k, the delay differentials .DELTA.L.sub.k not being all the same. The first and second waveguides preferably have delay differentials between successive directional couplers defined by.beta..DELTA.L.sub.k =.beta.n.sub.k .DELTA.L+.PHI..sub.kwhere n.sub.k is a set of co-prime positive integers, .beta. is defined by .beta.+2.pi.n.sub.eff /.lambda., .DELTA.L is defined by .DELTA.L=c/n.sub.eff .DELTA.f, c is the speed of light in a vacuum, n.sub.eff is the effective refractive index of the conduit, .lambda. is a wavelength selected from a range of carrier wavelengths .lambda..sub.1 . . . .lambda..sub.NCh for which the add/drop multiplexer is resonant, .PHI..sub.k is a phase parameter between 0 and 2.pi., and .DELTA.f is a pre-selected spectral range of the resonant coupler

摘要翻译： 信号处理电路，信号处理电路包括第一和第二波导，在第一和第二波导之间的一系列连续耦合器Ci，耦合器沿着第一和第二波导彼此间隔开，第一和第二波导具有延迟 连续耦合器Ck-1和Ck之间的差分DELTA Lk，延迟差DELTA Lk不一样。 第一和第二波导优选地具有由βDELTA L k =βnk DELTA L + PHI k定义的连续定向耦合器之间的延迟微分，其中nk是一组共同正整数，β由β+ 2 pi neff /λ，DELTA L由DELTA L = c / neff DELTA f定义，c是真空中的光速，neff是导管的有效折射率，λ是从载波波长λ1的范围中选择的波长。 。 。 λNCh，分插复用器谐振，PHI k是0和2 pi之间的相位参数，DELTA f是谐振耦合器的预选光谱范围

公开(公告)号：US06490077B1

公开(公告)日：2002-12-03

申请号：US09717319

申请日：2000-11-20

申请人： Jan Conradi

发明人： Jan Conradi

IPC分类号： H01S330

CPC分类号： H01S3/06754 ,  H01S3/06758 ,  H01S3/302 ,  H01S5/50

摘要： An optical signal amplifier includes a Raman fiber amplifier and a semiconductor optical amplifier. The Raman fiber amplifier utilizes pump radiation to amplify the optical signal resulting in an amplified optical signal. The semiconductor optical amplifier receives the amplified signal amplifying the amplified signal resulting in a twice amplified signal.

摘要翻译： 光信号放大器包括拉曼光纤放大器和半导体光放大器。 拉曼光纤放大器利用泵浦辐射来放大光信号，产生放大的光信号。 半导体光放大器接收放大的信号，放大放大的信号，产生两倍的放大信号。