公开(公告)号：US5524118A

公开(公告)日：1996-06-04

申请号：US358532

申请日：1994-12-19

申请人： Kyong-Hon Kim ,  Hak-Kyu Lee ,  Seo-Yeon Park ,  El-Hang Lee

发明人： Kyong-Hon Kim ,  Hak-Kyu Lee ,  Seo-Yeon Park ,  El-Hang Lee

IPC分类号： H01S3/07 ,  H01S3/06 ,  H01S3/067 ,  H01S3/08 ,  H01S3/083 ,  H01S3/10 ,  H01S3/102 ,  H01S3/106 ,  H01S3/23 ,  H04B10/00 ,  H04B10/25 ,  H01S3/30

CPC分类号： H01S3/067 ,  H01S3/08086 ,  H01S3/083 ,  H01S3/2383

摘要： A wavelength-varying multi-wavelength optical filter laser using a single pump light source is disclosed. The laser comprises a wavelength-division multiplexing coupler for applying an output from a single pump light source, a first multi-branch optical fiber coupler for branching the light from the single pump light source into a plurality of optical paths, an erbium-doped fiber located at each of optical paths, wavelength-varying optical filters located at rear of each erbium-doped fiber in each optical paths, said wavelength-varying optical filters for generating laser outputs of different wavelengths in each optical paths, optical isolators located between the erbium-doped fiber and the wavelength-varying optical filter in each optical paths, said optical isolators for reducing interference between laser outputs to be stable, optic attenuators located at rear of the wavelength-varying optical filter in each optical paths, said attenuators for regulating a mode beating between laser outputs of different wavelengths, thereby causing the multi-wavelength laser oscillation to be possible, a second multi-branch optical fiber coupler for coupling branched-optical paths, and a variable optical fiber coupler located at rear of the second multi-branch optical fiber, said variable optical fiber coupler for regulates a coupling ratio of the second variable optical fiber coupler, thereby making the output thereof to be maximum.

摘要翻译： 公开了使用单个泵浦光源的波长变化的多波长光学滤波器激光器。 激光器包括用于施加来自单个泵浦光源的输出的波分复用耦合器，用于将来自单个泵浦光源的光分支到多个光路中的第一多分支光纤耦合器，掺铒光纤 位于每个光路中的每个光路中位于每个掺铒光纤后面的波长变化滤光器，用于在每个光路中产生不同波长的激光输出的所述波长变化滤光器，位于铒之间的光隔离器 每个光路中的掺杂光纤和波长变化滤光器，用于减少激光输出之间的干扰的光隔离器是稳定的，位于每个光路中的波长变化滤光器后面的光衰减器，所述衰减器用于调节 在不同波长的激光输出之间进行模式跳动，从而使多波长激光振荡成为可能， 用于耦合分支光路的第二多分支光纤耦合器和位于第二多分支光纤后面的可变光纤耦合器，所述可变光纤耦合器用于调节第二可变光纤耦合器的耦合比 ，从而使其输出最大。

公开(公告)号：US06369926B1

公开(公告)日：2002-04-09

申请号：US09136714

申请日：1998-08-19

申请人： Gap Youl Lyu ,  Hyun Jae Lee ,  Seo Yeon Park ,  Jong Hyun Lee

发明人： Gap Youl Lyu ,  Hyun Jae Lee ,  Seo Yeon Park ,  Jong Hyun Lee

IPC分类号： H04B1004

CPC分类号： H04B10/506 ,  H04B10/564 ,  H04B10/572

摘要： A multichannel light source wavelength and strength stabilizing apparatus and a method thereof are disclosed. The apparatus includes a first proportional/integrator for receiving an output signal from the error detector, detecting a value proportional thereto, integrating the detected proportional value, generating a signal corresponding to the optimum feedback circuit, and outputting to the temperature controller; a current controller for providing the current capable of controlling the light strength in accordance with the signal inputted to the light source and stabilizing the light strength; a second optical coupling unit for dividing the output signal from the first optical coupling unit; a photodetector for converting the strength of a light among the output signals from the second optical coupling unit into an electrical signal; and a second proportional/integration unit for detecting a proportional value of the output signal from the optical detector, integrating the detected proportional value, generating a signal corresponding to the optimum feedback circuit, and outputting to the current controller.

摘要翻译： 公开了一种多通道光源波长和强度稳定装置及其方法。 该装置包括：第一比例/积分器，用于接收来自误差检测器的输出信号，检测与其成比例的值，积分检测到的比例值，产生对应于最佳反馈电路的信号，并输出到温度控制器; 电流控制器，用于根据输入到光源的信号提供能够控制光强度的电流并稳定光强度; 第二光耦合单元，用于分割来自第一光耦合单元的输出信号; 用于将来自第二光耦合单元的输出信号中的光的强度转换为电信号的光电检测器; 以及第二比例/积分单元，用于检测来自光学检测器的输出信号的比例值，积分检测到的比例值，产生对应于最佳反馈电路的信号，并输出到电流控制器。

公开(公告)号：US6118562A

公开(公告)日：2000-09-12

申请号：US986267

申请日：1997-12-05

申请人： Hyun Jae Lee ,  Gap Youl Lyu ,  Seo Yeon Park

发明人： Hyun Jae Lee ,  Gap Youl Lyu ,  Seo Yeon Park

IPC分类号： H04J14/02 ,  H01S5/0687 ,  H01S5/40 ,  H04B10/50 ,  H04B10/572

CPC分类号： H01S5/0687 ,  H04B10/506 ,  H04B10/572 ,  H01S5/4087

摘要： A wavelength aligning apparatus using an arrayed waveguide grating (AWG), and particularly, to a wavelength aligning apparatus using an arrayed waveguide grating which is capable of aligning optical sources using a transmission characteristic of an arrayed waveguide grating in a wavelength alignment method. The apparatus includes a signal generator for applying a signal spaced-apart at a predetermined interval near a predetermined frequency to a bias current of the light source and dithering a central wavelength of each light source, an arrayed waveguide grating for providing a reference wavelength causing a variation difference from the central portion due to a dithering of the central wavelength, a temperature controller for determining a reference wave length by constantly maintaining a temperature of the arrayed waveguide grating, an optical fiber coupler disposed in an output terminal of the arrayed waveguide grating for dividing the signal into a transmission signal and an incoming signal, a plurality of locking amplifiers and a proportional/integration/differentiating unit for computing a bias current corresponding to the detected error signal, and a superposing unit for superposing the computed bias current and a signal from the signal generator for output to the laser diode driver.

摘要翻译： 使用阵列波导光栅（AWG）的波长对准装置，特别涉及使用阵列波导光栅的波长对准装置，该阵列波导光栅能够使用波长对准方法中的阵列波导光栅的透射特性对准光源。 该装置包括：信号发生器，用于以预定频率以预定间隔间隔地附加到光源的偏置电流并抖动每个光源的中心波长的信号发生器，用于提供参考波长的阵列波导光栅， 由于中心波长的抖动引起的与中心部分的变化差异，用于通过不断维持阵列波导光栅的温度来确定参考波长的温度控制器，布置在阵列波导光栅的输出端中的光纤耦合器 将信号分成传输信号和输入信号，多个锁定放大器和用于计算与检测到的误差信号相对应的偏置电流的比例/积分/微分单元，以及叠加单元，用于叠加计算出的偏置电流和信号 从信号发生器输出到激光二极管驱动 r。

公开(公告)号：US5774217A

公开(公告)日：1998-06-30

申请号：US734265

申请日：1996-10-21

申请人： Hak-Kyu Lee ,  Kyong-Hon Kim ,  Seo-Yeon Park ,  El-Hang Lee

发明人： Hak-Kyu Lee ,  Kyong-Hon Kim ,  Seo-Yeon Park ,  El-Hang Lee

IPC分类号： G02B6/00 ,  G01N21/45 ,  G01B9/02

CPC分类号： G01N21/45

摘要： A measurement of nonlinear refractive index coefficient of an optical fiber with a Sagnac interferometer, comprises the steps of employing the optical fiber in a Sagnac interferometer, splitting a signal beam into two signals, launching the two split signals into the interferometer in opposite directions, combining and detecting the signals counter-propagated in the interferometer, and detecting the refractive index coefficient of the optical fiber in accordance with the difference between the two signal powers determined by a control beam. The quasi-static phase shift of the signal beam counter-propagating the same paths of the interferometer is induced by rotating the optical fiber loop of the interferometer. The present invention gives rise to little error because it does not require precise information about the pulse width of a used beam or a high-power light.

摘要翻译： 使用Sagnac干涉仪测量光纤的非线性折射率系数包括以下步骤：在Sagnac干涉仪中采用光纤，将信号光束分成两个信号，将两个分离信号以相反方向发射到干涉仪中，组合 并检测在干涉仪中反向传播的信号，并且根据由控制光束确定的两个信号功率之差检测光纤的折射率系数。 通过旋转干涉仪的光纤环来感应反向传播干涉仪相同路径的信号光束的准静态相移。 由于不需要关于使用光束或大功率光的脉冲宽度的精确信息，本发明产生很小的误差。

公开(公告)号：US5828680A

公开(公告)日：1998-10-27

申请号：US712597

申请日：1996-09-13

申请人： Kyong-Hon Kim ,  Seo-Yeon Park ,  Hak-Kyu Lee ,  Min-Yong Jeon

发明人： Kyong-Hon Kim ,  Seo-Yeon Park ,  Hak-Kyu Lee ,  Min-Yong Jeon

IPC分类号： H01S3/10 ,  H01S3/067 ,  H01S3/083 ,  H01S3/098 ,  H01S3/30

CPC分类号： H01S3/06791 ,  H01S3/082 ,  H01S3/1109 ,  H01S3/1112 ,  Y10S372/70

摘要： A hybrid type passively and actively mode-locked laser scheme is disclosed, in which not only the capability of producing ultra-short optical pulses by the conventional passively mode-locked optical fiber laser scheme is utilized, but also the repetition rate variation capability and the optical pulse synchronization capability of the conventional actively mode-locked laser scheme are utilized. Consequently, all the advantages of the two conventional laser schemes are obtained in the present invention. Specifically, two loops are coupled together, and one of the two loops consists of a non-linear amplifying loop of the existing passively mode-locked scheme, while the other loop includes an optical modulator and an optical gain medium for the loop to perform the function of an actively mode-locked scheme. Further the other loop includes a time delay line so as to adjust the laser oscillation repetition rate. The ultra-short optical pulses of the present invention will be applied to high speed time division multiplexed optical communication system, high speed optical signal processors, and ultrafast optical phenomenon studies.

摘要翻译： 公开了一种混合型被动和主动锁模激光器方案，其中不仅利用常规被动锁模光纤激光器方案产生超短光脉冲的能力，而且重复频率变化能力和 利用传统的主动锁模激光方案的光脉冲同步能力。 因此，在本发明中获得了两种常规激光方案的所有优点。 具体地，两个环路耦合在一起，并且两个环路中的一个环路由现有被动锁模方案的非线性放大环路组成，而另一个环路包括用于环路的光学调制器和光学增益介质， 主动模式锁定方案的功能。 此外，另一个环路包括时间延迟线，以便调整激光振荡重复率。 本发明的超短光脉冲将被应用于高速时分复用光通信系统，高速光信号处理器和超快光学现象研究。

公开(公告)号：US5592319A

公开(公告)日：1997-01-07

申请号：US360140

申请日：1994-12-20

申请人： Hak-Kyu Lee ,  Kyong-Hon Kim ,  Seo-Yeon Park ,  El-Hang Lee

发明人： Hak-Kyu Lee ,  Kyong-Hon Kim ,  Seo-Yeon Park ,  El-Hang Lee

IPC分类号： G02B6/00 ,  G02B26/02 ,  G02B26/08 ,  G02F1/313 ,  G02F1/35 ,  H04Q11/00 ,  H04J14/02

CPC分类号： H04Q11/0001

摘要： An all-optical signal processing apparatus of a non-linear fiber loop mirror type comprises a very high-speed all-optical switch that can be used as a reverse multiplexed switch in a high-speed time division optical communication. The apparatus includes a non-linear loop mirror for switching signal light by adjusting light using the non-linear effect of an optical fiber and the characteristics of a sagnac interferometer as the fundamental configuration. The all-optical switch is constructed so that another adjustment light having an appropriate time delay with respect to an existing adjusting light is additionally introduced in order to compensate for the limitation on the switching bandwidth imposed by the walk-off between adjusting and signal lights in a conventional non-linear optical fiber loop mirror. This compensates for the cross-talk of the noise signals due to DC components generated in the conventional apparatus. A switching window of a desirable size is obtained by properly adjusting the time delay between two adjusting lights and resolving the bandwidth limitation of the switch due to the walk-off of the adjusting and signal lights according to the timing jitter of signal light.

摘要翻译： 非线性光纤环路反射镜的全光信号处理装置包括可以用作高速时分光通信中的反向多路复用开关的非常高速的全光开关。 该装置包括一个用于通过使用光纤的非线性效应调节光和用作基本结构的萨尼亚克干涉仪的特性来切换信号光的非线性环路镜。 全光开关被构造成使得对于现有的调节光具有适当的时间延迟的另一个调节光被额外地引入，以便补偿由调节和信号光之间的偏移所施加的开关带宽的限制 传统的非线性光纤环路镜。 这补偿了由于常规装置中产生的DC分量引起的噪声信号的串扰。 通过适当地调节两个调节灯之间的时间延迟并根据信号光的定时抖动由于调节和信号灯的脱离而解决开关的带宽限制，获得所需尺寸的开关窗口。

公开(公告)号：US20130163986A1

公开(公告)日：2013-06-27

申请号：US13641078

申请日：2011-04-15

申请人： Pavel Mamyshev ,  John Leonard Zyskind ,  Seo Yeon Park ,  Fenghai Liu

发明人： Pavel Mamyshev ,  John Leonard Zyskind ,  Seo Yeon Park ,  Fenghai Liu

IPC分类号： H04B10/2507

CPC分类号： H04B10/69

摘要： The present application describes methods and systems that improve the optical signal to noise ratio performance of an optical network without the need to vary the free spectral range associated with a differential interferometer. This is achieved by varying an electrical bandwidth of an electronic device associated with the receiver. For example, the electrical bandwidth may vary in inverse proportion to the combined effective optical bandwidth of the transmission line carrying the optical signal. The techniques described herein a applicable to a wide variety of modulation formats, including mPSK, DPSK, DmPSK, PDmPSK, mQAM, ODB, and other direct-detection formats. Using the techniques described herein, the optical signal to noise ratio and bit error ratio performance of the optical network is improved without the need to provide costly and complex differential interferometers whose free spectral range is variable.

摘要翻译： 本申请描述了改进光学网络的光信噪比性能的方法和系统，而不需要改变与差分干涉仪相关联的自由光谱范围。 这通过改变与接收器相关联的电子设备的电带宽来实现。 例如，电带宽可以与携带光信号的传输线的组合有效光带宽成反比变化。 本文描述的技术适用于包括mPSK，DPSK，DmPSK，PDmPSK，mQAM，ODB和其他直接检测格式的各种调制格式。 利用这里描述的技术，改善了光网络的光信噪比和比特误差比性能，而不需要提供昂贵和复杂的差分干涉仪，其自由光谱范围是可变的。

公开(公告)号：US07173756B2

公开(公告)日：2007-02-06

申请号：US10906382

申请日：2005-02-17

申请人： John Zyskind ,  Andrew Niall Robinson ,  Seo Yeon Park ,  Clement Dowd Burton ,  John Jacob ,  Erik Robert Thoen

发明人： John Zyskind ,  Andrew Niall Robinson ,  Seo Yeon Park ,  Clement Dowd Burton ,  John Jacob ,  Erik Robert Thoen

IPC分类号： H01S3/00

CPC分类号： H01S3/06758 ,  H01S3/094003 ,  H01S3/094096 ,  H01S3/1608 ,  H01S3/302 ,  H01S2301/04 ,  H04B10/2935

摘要： An optical communications system includes a plurality of optical fiber spans. An optical loss of one of the plurality of optical fiber spans is different from an optical loss of another one of the plurality of optical fiber spans. At least one of the plurality of optical fiber spans includes an optical loss that is greater than or equal to 35 dB and at least one of the plurality of optical fiber spans includes an optical loss that is less than 30 dB. An optical amplification system includes at least one discrete optical amplifier, at least one distributed optical amplifier, and an optical loss element. The optical amplification system has spectral gain that compensates for substantially all losses experienced by the optical signals propagating in the plurality of optical fiber spans.

摘要翻译： 光通信系统包括多个光纤跨段。 多个光纤跨度中的一个的光损耗不同于多个光纤跨段中的另一个的光损耗。 多个光纤跨度中的至少一个包括大于或等于35dB的光损耗，并且多个光纤跨度中的至少一个包括小于30dB的光损耗。 光放大系统包括至少一个分立光放大器，至少一个分布式光放大器和光损耗元件。 光放大系统具有光谱增益，其补偿在多个光纤跨段中传播的光信号所经历的基本上所有的损耗。