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：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：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：US5734665A

公开(公告)日：1998-03-31

申请号：US710525

申请日：1996-09-18

申请人： Min-Yong Jeon ,  Wang-Yuhl Oh ,  Hak-Kyu Lee ,  Kyong-Hon Kim ,  El-Hang Lee

发明人： Min-Yong Jeon ,  Wang-Yuhl Oh ,  Hak-Kyu Lee ,  Kyong-Hon Kim ,  El-Hang Lee

IPC分类号： H01S3/00 ,  G02F1/35 ,  H01S3/067 ,  H01S3/30

CPC分类号： H01S3/067 ,  G02F1/3519

摘要： An optical fiber laser is disclosed capable of generating an ultrashort pulse which has intensive energy and is stable against polarization by using a sagnac loop mirror and a Faraday rotator mirror, which includes a light pumping laser diode; an erbium doped fiber-added optical fiber; a wavelength division multiplier fiber coupler; a dispersion shifted fiber; and an optical fiber directional coupler; a nonlinear amplifier loop mirror; a second polarization controller; a linear mirror having a Faraday rotator mirror for rotating the polarization plane of a proceeding light wave; and a directional coupler being connected between the nonlinear amplifier loop mirror and the linear mirror.

摘要翻译： 公开了一种光纤激光器，其能够通过使用包括光泵浦激光二极管的sagnac环形反射镜和法拉第旋转镜来产生具有强力能量并且对极化稳定的超短脉冲; 掺铒光纤的光纤; 波分复用光纤耦合器; 色散位移光纤; 和光纤定向耦合器; 非线性放大器环路镜; 第二偏振控制器; 线性反射镜，其具有用于旋转正在进行的光波的偏振面的法拉第旋转镜; 以及在非线性放大器环路镜和线性反射镜之间连接的定向耦合器。

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。