公开(公告)号：US06560247B2

公开(公告)日：2003-05-06

申请号：US09993027

申请日：2001-11-05

Applicant: Do-Il Chang ,  Min-Yong Jeon ,  Kyong-Hon Kim

Inventor： Do-Il Chang ,  Min-Yong Jeon ,  Kyong-Hon Kim

IPC: H01S330

CPC classification number: H01S3/06754 ,  H01S3/0809 ,  H01S3/302

Abstract: A dual wavelength optical fiber laser includes a first and a second optical fibers which generating stimulated scattering by a pump light source; two short period optical fiber gratings that is resonating each of a first and a second wavelength light which are generated by the optical fibers and regulating reflecting characteristics according to the first and the second wavelengths; a WDM optical fiber coupler which inputs a pump wavelength to the optical fibers and outputs a laser operation wavelength; and an interference removing unit which is connected between the optical fibers and removes an interference in the first and the second wavelength of resonating.

公开(公告)号：US06266458B1

公开(公告)日：2001-07-24

申请号：US09416904

申请日：1999-10-13

Applicant: Joon Tae Ahn ,  Hak Kyu Lee ,  Min-Yong Jeon ,  Dong Sung Lim ,  Kyong-Hon Kim

Inventor： Joon Tae Ahn ,  Hak Kyu Lee ,  Min-Yong Jeon ,  Dong Sung Lim ,  Kyong-Hon Kim

IPC: G02B600

CPC classification number: G02B6/2726 ,  G02B6/2773 ,  G02B6/29302 ,  G02B6/29352 ,  G02B6/29395

Abstract: The present invention provides a tunable optical filtering system using fiber-optic polarimetric interferometer. The tunable optical filtering system using fiber-optic polarimetric interferometer in accordance with the present invention comprises a stabilization light source, a first polarization beam splitter, a first optical fiber node, a number of polarization maintaining optical fibers, a phase modulator, a stabilization electronics, a second optical fiber node, a second polarization beam splitter, and two wavelength division optical multiplexers. The stabilization light source supplies stabilization light. The first polarization beam splitter polarizes the stabilization light and the input light to be filtered and generates polarized light. The first optical fiber node connects the output of the first polarization beam splitter with polarization maintaining fibers with the angle of 45 degree between their birefringent axes and splits the polarized light. The number of polarization maintaining optical fibers carries the split light by the first optical fiber node. The phase modulator maintains phase difference between two birefringent axes of the polarization maintaining fibers. The stabilization electronics supply feedback signal to the phase modulator. The second optical fiber node connects the polarization maintaining fibers with the input of second polarization beam splitter with the angle of 45 degree between their birefringent axes, receives split light by said first optical fiber node, and generates interference signals. The second polarization beam splitter divides the interference signals into output signals by polarization axes. The wavelength division optical multiplexers divide the output signals into signals for the stabilization electronics and filtered signals by wavelengths.

Abstract translation: 本发明提供一种使用光纤偏振干涉仪的可调谐光学滤波系统。 根据本发明的使用光纤偏振干涉仪的可调谐光学滤波系统包括稳定光源，第一偏振分束器，第一光纤节点，多个保偏光纤，相位调制器，稳定电子器件 ，第二光纤节点，第二偏振分束器和两个波分复用器。 稳定光源提供稳定光源。 第一偏振分束器使稳定光和要滤波的输入光偏振，产生偏振光。 第一光纤节点将第一偏振分束器的输出端与偏振维持光纤以双折射轴之间的角度45度连接并分离偏振光。 偏振维持光纤的数量由第一光纤节点承载分离光。 相位调制器保持偏振保持光纤的两个双折射轴之间的相位差。 稳定电路向相位调制器提供反馈信号。 第二光纤节点将偏振保持光纤与第二偏振光束分离器的输入端在双折射轴之间以45度的角度连接，由所述第一光纤节点接收分束光，并产生干涉信号。 第二偏振分束器通过偏振轴将干扰信号分成输出信号。 波分复用器将输出信号划分为稳定电路的信号和波长的滤波信号。

公开(公告)号：US5734665A

公开(公告)日：1998-03-31

申请号：US710525

申请日：1996-09-18

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

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

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

CPC classification number: H01S3/067 ,  G02F1/3519

Abstract: 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.

Abstract translation: 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

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

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

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

CPC classification number: H01S3/06791 ,  H01S3/082 ,  H01S3/1109 ,  H01S3/1112 ,  Y10S372/70

Abstract: 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.

Abstract translation: 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：US5774217A

公开(公告)日：1998-06-30

申请号：US734265

申请日：1996-10-21

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

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

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

CPC classification number: G01N21/45

Abstract: 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.

Abstract translation: 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：US20100290055A1

公开(公告)日：2010-11-18

申请号：US12779236

申请日：2010-05-13

Applicant: Kyong-Hon Kim ,  Seoung-Hun Lee ,  Seung-Hwan Kim ,  El-Hang Lee

Inventor： Kyong-Hon Kim ,  Seoung-Hun Lee ,  Seung-Hwan Kim ,  El-Hang Lee

IPC: G01J3/45

CPC classification number: G01N21/636 ,  G01N21/1717 ,  G01N21/21 ,  G01N21/23 ,  G01N21/45 ,  G01N2021/1721

Abstract: Measuring of an electro-optic coefficient and a thermo-optic coefficient of an optical device and an optical material, and more specifically, to measurement systems and methods of evaluating the electro-optic and thermo-optic coefficients by using interference fringe measurement techniques, wherein those optical characteristics can be precisely measured over a wide wavelength intended without using a complicated measuring equipment. The system for measuring an electro-optic coefficient includes: a light source for outputting an optical beam of multi-wavelengths, an optical interferometer including an optical beam splitter for dividing the optical beam received from the light source into two separate beams, a reference arm for receiving any one of the divided optical beams, a sample arm for receiving the other of the divided optical beams and applying a voltage to an optical sample to be measured by being connected to the optical sample, and an optical beam combiner for combining and mutually interfering optical beams that are output through the reference arm and the sample arm, and an optical spectrum analyzing device for receiving the mutually interfered optical beam from the optical interferometer and analyzing a spectrum of the mutually interfered optical beam.

Abstract translation: 测量光学器件和光学材料的电光系数和热光学系数，更具体地说，涉及通过使用干涉条纹测量技术来评估电光和热光学系数的测量系统和方法，其中 可以在不使用复杂的测量设备的情况下在宽的波长上精确地测量这些光学特性。 用于测量电光系数的系统包括：用于输出多波长光束的光源;光干涉仪，包括用于将从光源接收的光束分成两束单独光束的光束分离器;参考臂 用于接收分割光束中的任何一个，用于接收另外的划分的光束并通过连接到光学样本向待测量的光学样本施加电压的采样臂以及用于组合和相互的光束组合器 通过参考臂和样本臂输出的干涉光束，以及用于从光学干涉仪接收相互干涉的光束并分析相互干涉的光束的光谱的光谱分析装置。

公开(公告)号：US5524118A

公开(公告)日：1996-06-04

申请号：US358532

申请日：1994-12-19

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

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

IPC: 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 classification number: H01S3/067 ,  H01S3/08086 ,  H01S3/083 ,  H01S3/2383

Abstract: 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.

Abstract translation: 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：US06413891B1

公开(公告)日：2002-07-02

申请号：US09689394

申请日：2000-10-11

Applicant: Doo-Hee Cho ,  Yong-Gyu Choi ,  Kyong-Hon Kim

Inventor： Doo-Hee Cho ,  Yong-Gyu Choi ,  Kyong-Hon Kim

IPC: C03C312

CPC classification number: C03C13/048 ,  C03C3/122 ,  C03C3/253 ,  H01S3/177

Abstract: Glasses of the present invention are tellurite and oxyhalide glasses doped with rare-earth ion, which can be applied to highly efficient optical amplifiers and lasers for optical communication. They are thermally and chemically stable during and after the fabrication processes of the optical fiber. The glass material includes 20˜70 mole % of TeO2, a heavy metal oxide, 0.001˜10 mole % of a rare earth ion dopant, 5˜30 mole % of MO, M being selected from a group consisting of Mg, Ca, Sr, Ba, Zn and Pb, and optionally 1˜20 mole % of R2O, R being selected from a group consisting of Li, Na, K, Rb and Cs. In the composition of the glass, 3˜18 mole % of MO and R2O may be substituted by the metal halides. The glasses of the present invention are similar in phonon energy to the conventional tellurite glasses not to increase the non-radiative transition rate. Further, the fluorescence lifetime is additionally increased in case of partial substitution of oxide to halide.

Abstract translation: 本发明的玻璃是掺杂有稀土离子的碲酸盐和卤氧化物玻璃，其可以应用于用于光通信的高效光放大器和激光器。 它们在光纤的制造过程中和之后是热和化学稳定的。 玻璃材料包括20〜70摩尔％的TeO 2，重金属氧化物，0.001〜10摩尔％的稀土离子掺杂剂，5〜30摩尔％的MO，M选自Mg，Ca，Sr ，Ba，Zn和Pb，以及任选的1-20摩尔％的R 20，R选自Li，Na，K，Rb和Cs。 在玻璃的组成中，3〜18摩尔％的MO和R2O可以被金属卤化物取代。 本发明的玻璃在声子能量方面与常规的碲化物玻璃类似，不增加非辐射跃迁速率。 此外，在将氧化物部分置换为卤化物的情况下，荧光寿命另外增加。

公开(公告)号：US08724117B2

公开(公告)日：2014-05-13

申请号：US12779236

申请日：2010-05-13

Applicant: Kyong-Hon Kim ,  Seoung-Hun Lee ,  Seung-Hwan Kim ,  El-Hang Lee

Inventor： Kyong-Hon Kim ,  Seoung-Hun Lee ,  Seung-Hwan Kim ,  El-Hang Lee

IPC: G01B9/02

CPC classification number: G01N21/636 ,  G01N21/1717 ,  G01N21/21 ,  G01N21/23 ,  G01N21/45 ,  G01N2021/1721

Abstract: Measuring of an electro-optic coefficient and a thermo-optic coefficient of an optical device and an optical material, and more specifically, to measurement systems and methods of evaluating the electro-optic and thermo-optic coefficients by using interference fringe measurement techniques, wherein those optical characteristics can be precisely measured over a wide wavelength intended without using a complicated measuring equipment. The system for measuring an electro-optic coefficient includes: a light source for outputting an optical beam of multi-wavelengths, an optical interferometer including an optical beam splitter for dividing the optical beam received from the light source into two separate beams, a reference arm for receiving any one of the divided optical beams, a sample arm for receiving the other of the divided optical beams and applying a voltage to an optical sample to be measured by being connected to the optical sample, and an optical beam combiner for combining and mutually interfering optical beams that are output through the reference arm and the sample arm, and an optical spectrum analyzing device for receiving the mutually interfered optical beam from the optical interferometer and analyzing a spectrum of the mutually interfered optical beam.

Abstract translation: 测量光学器件和光学材料的电光系数和热光学系数，更具体地说，涉及通过使用干涉条纹测量技术来评估电光和热光学系数的测量系统和方法，其中 可以在不使用复杂的测量设备的情况下在宽的波长上精确地测量这些光学特性。 用于测量电光系数的系统包括：用于输出多波长光束的光源;光干涉仪，包括用于将从光源接收的光束分成两束单独光束的光束分离器;参考臂 用于接收分割光束中的任何一个，用于接收另外的划分的光束并通过连接到光学样本向待测量的光学样本施加电压的采样臂以及用于组合和相互的光束组合器 通过参考臂和样本臂输出的干涉光束，以及用于从光学干涉仪接收相互干涉的光束并分析相互干涉的光束的光谱的光谱分析装置。

公开(公告)号：US06654520B2

公开(公告)日：2003-11-25

申请号：US09961259

申请日：2001-09-25

Applicant: Yong-Gyu Choi ,  Jong-Bae Kim ,  Doo-Hee Cho ,  Kyong-Hon Kim

Inventor： Yong-Gyu Choi ,  Jong-Bae Kim ,  Doo-Hee Cho ,  Kyong-Hon Kim

IPC: G02B634

CPC classification number: G02F1/383 ,  G02F1/3558

Abstract: The present invention relates to the fabrication of an optical device; and, more particularly to an electrode for fabricating periodically poled optical fibers and a fabrication method of periodically poled optical fibers using the electrode. To fabricate periodically poled optical fibers for improving the effect of three wave mixing in accordance with the second-order nonlinear optical phenomenon, the periodically poled optical fibers of the present invention is formed by using one or more electrodes with holes or grooves for a period satisfying the quasi phase matching condition between light waves in use. Also, using the electrodes described above, one or more holes or one or more grooves are formed on the surface of the optical fiber around the core in its length direction, and thereby make an optical fiber poled periodically.