公开(公告)号：US20060045542A1

公开(公告)日：2006-03-02

申请号：US10528445

申请日：2003-04-22

Applicant: Chang-Hee Lee ,  Kwang-Uk Chu ,  Bong-Soo Kim

Inventor： Chang-Hee Lee ,  Kwang-Uk Chu ,  Bong-Soo Kim

IPC: H04B10/04

CPC classification number: H04B10/572

Abstract: An optical transmitter has a resonance wavelength characteristic that varies with the refractive index of the optical transmitter. The optical transmitter receives a narrow band injected wavelength signal from an incoherent light source. The controller substantially matches a resonant wavelength of the optical transmitter to the wavelength of the injected wavelength signal by changing the refractive index of the optical transmitter to substantially match the resonant wavelength of the optical transmitter and the wavelength of the injected wavelength signal. A detector measures a parameter of the optical transmitter to provide a feedback signal to a controller to determine when the resonant wavelength of the optical transmitter and the wavelength of the injected wavelength signal are substantially matched.

公开(公告)号：US20050163503A1

公开(公告)日：2005-07-28

申请号：US10502166

申请日：2003-01-21

Applicant: Chang-Hee Lee ,  Kwang-Uk Chu ,  Tae-Won Oh

Inventor： Chang-Hee Lee ,  Kwang-Uk Chu ,  Tae-Won Oh

IPC: H04L12/44 ,  H04B10/00 ,  H04B10/07 ,  H04B10/27 ,  H04B10/272 ,  H04B10/29 ,  H04J14/00 ,  H04J14/02 ,  H04L12/28 ,  H04B10/08

CPC classification number: H04J14/02 ,  H04B10/506 ,  H04J14/0226 ,  H04J14/0227 ,  H04J14/0246 ,  H04J14/025 ,  H04J14/0282 ,  H04J14/0297

Abstract: Various methods, systems, and apparatuses in which a wavelength-division-multiplexing passive-optical-network includes a first broadband light source and a second broadband light source. The first broadband light source supplies an optical signal containing a first band of wavelengths to a first plurality of optical transmitters. The second broadband light source supplies an optical signal containing a second band of wavelengths to a second plurality of optical transmitters. A fiber is used for bi-directional transmission of optical signals in at least two different wavelength bands.

Abstract translation: 波分复用无源光网络包括第一宽带光源和第二宽带光源的各种方法，系统和装置。 第一宽带光源将含有第一波长带的光信号提供给第一多个光发射机。 第二宽带光源将包含第二波长带的光信号提供给第二多个光发射机。 光纤用于在至少两个不同波长带中的光信号的双向传输。

公开(公告)号：US20120268855A1

公开(公告)日：2012-10-25

申请号：US13326543

申请日：2011-12-15

Applicant: Kwang-Uk CHU ,  Up NAMKOONG ,  Kyung-Hoon LEE

Inventor： Kwang-Uk CHU ,  Up NAMKOONG ,  Kyung-Hoon LEE

IPC: H02H3/22

CPC classification number: H02H9/041 ,  H02H9/042

Abstract: A surge protection apparatus is provided. The surge protection apparatus includes a non-linear element unit, a signal generation unit, and a switching element unit. The non-linear element unit enables an electrical surge to pass therethrough by rapidly decreasing resistance of the non-linear element unit when the difference in voltage between two ends of the non-linear element unit is equal to or greater than a predetermined value. The signal generation unit generates a control signal in response to current which passes through the non-linear element unit. The switching element unit switches the status thereof in response to the control signal.

Abstract translation: 提供一种浪涌保护装置。 浪涌保护装置包括非线性元件单元，信号生成单元和开关元件单元。 当非线性元件单元的两端之间的电压差等于或大于预定值时，非线性元件单元通过快速降低非线性元件单元的电阻使得电涌通过。 信号生成单元响应于通过非线性元件单元的电流产生控制信号。 开关元件单元响应于控制信号切换其状态。

公开(公告)号：US07469102B2

公开(公告)日：2008-12-23

申请号：US10530445

申请日：2003-04-18

Applicant: Chang-Hee Lee ,  Kwang-Uk Chu

Inventor： Chang-Hee Lee ,  Kwang-Uk Chu

IPC: H04J14/02

CPC classification number: H04J14/0282 ,  H04J14/02 ,  H04J14/0226 ,  H04J14/0227 ,  H04J14/0247 ,  H04J14/025 ,  H04J14/0287

Abstract: Various methods, systems, and apparatuses is described in which a passive-opticalnetwork includes a first multiplexer/demultiplexer, a second multiplexer/demultiplexer, a wavelength tracking component, and a transmission wavelength controller. The first multiplexer/demultiplexer is located in a first location. The second multiplexer/demultiplexer is located in a second location remote from the first location. The wavelength tracking component determines the difference between the transmission band of wavelengths of the first multiplexer/demultiplexer and the second multiplexer/demultiplexer to provide a control signal to match the transmission band of wavelengths of the first multiplexer/demultiplexer and the second multiplexer/demultiplexer. The transmission wavelength controller alters an operating parameter of the first multiplexer/demultiplexer based on the control signal to control the transmission band of wavelengths of the first multiplexer/demultiplexer.

Abstract translation: 描述了各种方法，系统和装置，其中无源光网络包括第一多路复用器/解复用器，第二多路复用器/解复用器，波长跟踪组件和传输波长控制器。 第一复用器/解复用器位于第一位置。 第二多路复用器/解复用器位于远离第一位置的第二位置。 波长跟踪组件确定第一多路复用器/多路分解器和第二多路复用器/解复用器的波长的传输频带之间的差异，以提供控制信号以匹配第一多路复用器/解复用器和第二多路复用器/解复用器的波长的传输频带。 传输波长控制器基于控制信号改变第一多路复用器/解复用器的操作参数，以控制第一多路复用器/解复用器的波长的传输频带。

公开(公告)号：US07171123B2

公开(公告)日：2007-01-30

申请号：US10353745

申请日：2003-01-28

Applicant: Chang Hee Lee ,  Tae Won Oh ,  Kwang Uk Chu

Inventor： Chang Hee Lee ,  Tae Won Oh ,  Kwang Uk Chu

IPC: H04J14/02

CPC classification number: H04J14/0297 ,  H04B10/032 ,  H04B10/2503 ,  H04B10/27 ,  H04B10/272 ,  H04B10/2939 ,  H04B10/2972 ,  H04J14/02 ,  H04J14/0282

Abstract: The present invention relates to a wavelength-division multiplexed passive optical network. In particular, it relates to a technology for minimizing the optical loss at a wavelength-division multiplexed passive optical network based on wavelength-locked light source Thereby it improves the transmission quality and increases the transmission distance.A 4-port optical path setting device of the present invention increases the amount of light injected into an optical transmitter and thereby improves the wavelength-locking characteristic of a light source. In addition, it can decrease the optical transmission loss in an optical transmission path, and by an optical amplifier being inserted therein; it can also compensate the optical loss in an optical transmission path.In the present invention, a 4-port optical path setting device having the characteristics described above and a method for fault recovery without an additional optical loss are presented.

Abstract translation: 波分复用无源光网络技术领域本发明涉及一种波分复用无源光网络。 具体地说，涉及一种基于波长锁定光源的波分复用无源光网络的光损耗最小化的技术，从而提高了传输质量并提高了传输距离。 本发明的4端口光路设定装置增加了光发射机的光量，从而提高了光源的波长锁定特性。 另外，可以减少光传输路径中的光传输损耗，并且其中插入光放大器; 它还可以补偿光传输路径中的光损耗。 在本发明中，提出了具有上述特征的4端口光路设定装置和没有附加光损耗的故障恢复方法。

公开(公告)号：US06671045B1

公开(公告)日：2003-12-30

申请号：US09679822

申请日：2000-10-05

Applicant: Chang Hee Lee ,  Sang Yung Shin ,  Kwang Uk Chu

Inventor： Chang Hee Lee ,  Sang Yung Shin ,  Kwang Uk Chu

IPC: G01J400

CPC classification number: H04B10/077 ,  G01J4/04 ,  H04B10/07955

Abstract: An apparatus and method for measuring optical signal-to-noise ratio in optical communications includes (1) a variable optical band-pass filter (VOBPF) that passes the amplified output beam when the beam wavelength is the same as the passing wavelength of the VOBPF; (2) a 1×4 beam distributor for distributing the passing beam of the VOBPF into four streams; (3) a measuring device for measuring Stokes parameters S0, S1, S2, S3 from the four distributed beams; (4) a calculating device for calculating the optical signal power by finding the power of the polarized component of the amplified output beam from the Stokes parameters S1, S2, and S3; (5) a calculating device for calculating the noise power by finding the power of the noise included in the amplified output beam from Stokes parameter S0 and the optical signal power; and (6) a dividing device for calculating the ratio Power ⁢   ⁢ of ⁢   ⁢ Optical ⁢   ⁢ Signal Power ⁢   ⁢ of ⁢   ⁢ Noise at the passing wavelength.

Abstract translation: 用于测量光通信中的光信噪比的装置和方法包括：（1）当光束波长与VOBPF的通过波长相同时，通过放大的输出光束的可变光学带通滤波器（VOBPF） ; （2）1x4光束分配器，用于将VOBPF的通过光束分配成四个流; （3）用于从四个分布式波束测量斯托克斯参数S0，S1，S2，S3的测量装置; （4）计算装置，用于通过从斯托克斯参数S1，S2和S3中找出放大的输出光束的偏振分量的功率来计算光信号功率; （5）一种计算装置，用于通过从Stokes参数S0和光信号功率中找出包含在放大的输出光束中的噪声的功率来计算噪声功率; 和（6）用于计算通过波长的比值的分割装置。

公开(公告)号：US06396574B1

公开(公告)日：2002-05-28

申请号：US09524156

申请日：2000-03-14

Applicant: Chang Hee Lee ,  Sang Yung Shin ,  Kwang Uk Chu

Inventor： Chang Hee Lee ,  Sang Yung Shin ,  Kwang Uk Chu

IPC: G01N2100

CPC classification number: G01J1/4257 ,  G01J9/00 ,  G01J2009/0226 ,  G02B6/29319 ,  G02B6/29358 ,  G02B6/2938 ,  G02B6/29395 ,  H04B10/077 ,  H04B10/07955

Abstract: An apparatus for measuring the wavelength, optical power, and an optical signal-to-noise ratio (OSNR) of each optical signal in wavelength-division-multiplexing optical communication includes: elements for splitting a part of wavelength-division-multiplexed (WDM) signals, elements for amplifying the WDM signals and generating spontaneous emission light simultaneously, elements for reflecting a predetermined section of the spontaneous emission light and generating an optical reference signal, and elements for combining the optical reference signal with the part of the WDM signals split by the splitting elements and generating a combined light. The apparatus has components for filtering the combined light at a fixed temperature and generating a waveform which is the same as an optical spectrum of the combined light in the time domain. The apparatus includes elements for converting the waveform into an electrical signal and components for signal processing that measure the wavelength, the optical power, and the OSNR of the WDM signals.

Abstract translation: 用于测量波分复用光通信中每个光信号的波长，光功率和光信噪比（OSNR）的装置包括：用于将波分复用（WDM） 信号，用于放大WDM信号并同时产生自发发射光的元件，用于反射自发发射光的预定部分并产生光学参考信号的元件，以及用于将光学参考信号与WDM信号的一部分分开的元件 分离元件并产生组合光。 该装置具有用于在固定温度下对组合光进行滤波的部件，并产生与时域中的组合光的光谱相同的波形。 该装置包括用于将波形转换成电信号的元件和用于信号处理的组件，用于测量WDM信号的波长，光功率和OSNR。

公开(公告)号：US07646978B2

公开(公告)日：2010-01-12

申请号：US10502166

申请日：2003-01-21

Applicant: Chang-Hee Lee ,  Kwang-Uk Chu ,  Tae-Won Oh

Inventor： Chang-Hee Lee ,  Kwang-Uk Chu ,  Tae-Won Oh

IPC: H04B10/20 ,  H04B10/00 ,  H04J14/08

CPC classification number: H04J14/02 ,  H04B10/506 ,  H04J14/0226 ,  H04J14/0227 ,  H04J14/0246 ,  H04J14/025 ,  H04J14/0282 ,  H04J14/0297

Abstract: Various methods, systems, and apparatuses in which a wavelength-division-multiplexing passive-optical-network includes a first broadband light source and a second broadband light source. The first broadband light source supplies an optical signal containing a first band of wavelengths to a first plurality of optical transmitters. The second broadband light source supplies an optical signal containing a second band of wavelengths to a second plurality of optical transmitters. A fiber is used for bi-directional transmission of optical signals in at least two different wavelength bands.

Abstract translation: 波分复用无源光网络包括第一宽带光源和第二宽带光源的各种方法，系统和装置。 第一宽带光源将含有第一波长带的光信号提供给第一多个光发射机。 第二宽带光源将包含第二波长带的光信号提供给第二多个光发射机。 光纤用于在至少两个不同波长带中的光信号的双向传输。

公开(公告)号：US20090267458A1

公开(公告)日：2009-10-29

申请号：US12347528

申请日：2008-12-31

Applicant: Kwang Uk Chu ,  In Ho Hwang ,  Choon Sik Park

Inventor： Kwang Uk Chu ,  In Ho Hwang ,  Choon Sik Park

IPC: G10K9/122

CPC classification number: B06B1/0688 ,  H01L41/193

Abstract: Provided is an apparatus for preventing eavesdropping using a piezoelectric film. The apparatus includes a vibrator including the piezoelectric film, conductive layers connected to top and bottom surfaces of the piezoelectric film, and electrodes connected to the conductive layers, and a noise signal generator electrically connected to the vibrator to generate and transmit an electrical noise signal to the vibrator. The vibrator generates vibration in a solid body in close contact with itself in response to the electrical noise signal.

Abstract translation: 提供了一种用于防止使用压电膜的窃听的装置。 该装置包括：振动器，包括压电膜，连接到压电膜的顶表面和底表面的导电层，以及连接到导电层的电极;以及电连接到振动器的噪声信号发生器， 振动器。 振动器响应于电噪声信号而在固体中产生与其自身紧密接触的振动。

公开(公告)号：US20050286895A1

公开(公告)日：2005-12-29

申请号：US10530445

申请日：2003-04-18

Applicant: Chang-Hee Lee ,  Kwang-Uk Chu

Inventor： Chang-Hee Lee ,  Kwang-Uk Chu

IPC: H04J14/02

CPC classification number: H04J14/0282 ,  H04J14/02 ,  H04J14/0226 ,  H04J14/0227 ,  H04J14/0247 ,  H04J14/025 ,  H04J14/0287

Abstract: Various methods, systems, and apparatuses is described in which a passive-opticalnetwork includes a first multiplexer/demultiplexer, a second multiplexer/demultiplexer, a wavelength tracking component, and a transmission wavelength controller. The first multiplexer/demultiplexer is located in a first location. The second multiplexer/demultiplexer is located in a second location remote from the first location. The wavelength tracking component determines the difference between the transmission band of wavelengths of the first multiplexer/demultiplexer and the second multiplexer/demultiplexer to provide a control signal to match the transmission band of wavelengths of the first multiplexer/demultiplexer and the second multiplexer/demultiplexer. The transmission wavelength controller alters an operating parameter of the first multiplexer/demultiplexer based on the control signal to control the transmission band of wavelengths of the first multiplexer/demultiplexer.

Abstract translation: 描述了各种方法，系统和装置，其中无源光网络包括第一多路复用器/解复用器，第二多路复用器/解复用器，波长跟踪组件和传输波长控制器。 第一复用器/解复用器位于第一位置。 第二多路复用器/解复用器位于远离第一位置的第二位置。 波长跟踪组件确定第一多路复用器/多路分解器和第二多路复用器/解复用器的波长的传输频带之间的差异，以提供控制信号以匹配第一多路复用器/解复用器和第二多路复用器/解复用器的波长的传输频带。 传输波长控制器基于控制信号改变第一多路复用器/解复用器的操作参数，以控制第一多路复用器/解复用器的波长的传输频带。