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1. 发明授权

US5651080A Optical exchanging apparatus using mode conversion and mode selection in an optical waveguide 失效
标题翻译：在光波导中使用模式转换和模式选择的光交换装置
公开(公告)号：US5651080A
公开(公告)日：1997-07-22
申请号：US707305
申请日：1996-09-03
申请人： Kwang Uk Chu , Yong Hyub Won
发明人： Kwang Uk Chu , Yong Hyub Won
IPC分类号： G02B6/14 , H04J14/04 , H04Q11/00 , G02B6/28
CPC分类号： H04J14/04 , G02B6/14 , H04Q11/0005 , H04Q2011/0011 , H04Q2011/0015
摘要： An optical exchanging apparatus is disclosed including N optical transmitters for generating optical signals each having a single constant mode, N mode converters for converting modes of the optical signals generated from the optical transmitters according to a mode-converting signal, an Nx1 coupler for coupling the mode-converted optical signals generated from the mode converters to be supplied to one terminal, a 1xN distributor or distributing the coupled optical signal generated from the Nx1 coupler to N optical signals each having various modes, N mode selectors for respectively passing only the optical signal of a selected mode out of the N optical signals generated from the 1xN distributor, and N optical receivers for receiving the optical signals generated from the mode selectors.
摘要翻译：公开了一种光交换装置，其包括用于产生每个具有单个恒定模式的光信号的N个光发射机，用于根据模式转换信号转换从光发射机产生的光信号的模式的N模转换器，用于耦合从一个终端提供的模式转换器产生的模式转换的光信号，1×N分配器或将从Nx1耦合器产生的耦合的光信号分配给每个具有各种模式的N个光信号，N个模式选择器，用于分别仅通过光信号在从1xN分配器产生的N个光信号中选出的模式，以及N个用于接收从模式选择器产生的光信号的光接收器。

2. 发明授权

US07171123B2 Method for decreasing and compensating the transmission loss at a wavelength-division-multiplexed passive optical network and an apparatus therefor 有权
标题翻译：用于减少和补偿在波分复用无源光网络上的传输损耗的方法及其装置
公开(公告)号：US07171123B2
公开(公告)日：2007-01-30
申请号：US10353745
申请日：2003-01-28
申请人： Chang Hee Lee , Tae Won Oh , Kwang Uk Chu
发明人： Chang Hee Lee , Tae Won Oh , Kwang Uk Chu
IPC分类号： H04J14/02
CPC分类号： H04J14/0297 , H04B10/032 , H04B10/2503 , H04B10/27 , H04B10/272 , H04B10/2939 , H04B10/2972 , H04J14/02 , H04J14/0282
摘要： 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.
摘要翻译：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。

3. 发明授权

US06671045B1 Apparatus and method for measuring optical signal-to-noise ratio 失效
标题翻译：用于测量光信噪比的装置和方法
公开(公告)号：US06671045B1
公开(公告)日：2003-12-30
申请号：US09679822
申请日：2000-10-05
申请人： Chang Hee Lee , Sang Yung Shin , Kwang Uk Chu
发明人： Chang Hee Lee , Sang Yung Shin , Kwang Uk Chu
IPC分类号： G01J400
CPC分类号： H04B10/077 , G01J4/04 , H04B10/07955
摘要： 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.
摘要翻译：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。

4. 发明授权

US06396574B1 Apparatus for measuring the wavelength, optical power and optical signal-to-noise ratio of each optical signal in wavelength-division multiplexing optical communication 失效
标题翻译：用于测量波分复用光通信中每个光信号的波长，光功率和光信噪比的装置
公开(公告)号：US06396574B1
公开(公告)日：2002-05-28
申请号：US09524156
申请日：2000-03-14
申请人： Chang Hee Lee , Sang Yung Shin , Kwang Uk Chu
发明人： Chang Hee Lee , Sang Yung Shin , Kwang Uk Chu
IPC分类号： G01N2100
CPC分类号： G01J1/4257 , G01J9/00 , G01J2009/0226 , G02B6/29319 , G02B6/29358 , G02B6/2938 , G02B6/29395 , H04B10/077 , H04B10/07955
摘要： 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.
摘要翻译：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。

5. 发明申请

US20090267458A1 APPARATUS FOR PREVENTING EAVESDROPPING USING PIEZOELECTRIC FILM 审中-公开
标题翻译：用于使用压电膜防止EAVESPOPPING的装置
公开(公告)号：US20090267458A1
公开(公告)日：2009-10-29
申请号：US12347528
申请日：2008-12-31
申请人： Kwang Uk Chu , In Ho Hwang , Choon Sik Park
发明人： Kwang Uk Chu , In Ho Hwang , Choon Sik Park
IPC分类号： G10K9/122
CPC分类号： B06B1/0688 , H01L41/193
摘要： 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.
摘要翻译：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。

6. 发明授权

US06977731B1 Method and apparatus for enhancing the resolving power of a tunable optical filter 失效
标题翻译：用于提高可调光学滤光器的分辨率的方法和装置
公开(公告)号：US06977731B1
公开(公告)日：2005-12-20
申请号：US10081657
申请日：2002-02-21
申请人： Chang-Hee Lee , Kwang Uk Chu
发明人： Chang-Hee Lee , Kwang Uk Chu
IPC分类号： G01B9/02 , G01J3/26
CPC分类号： G01J3/26
摘要： A method and an apparatus for enhancing a resolving power of a tunable optical filter. An optical input is applied to the tunable filter. An electrical signal is applied to the tunable optical filter. The electrical signal has a first component that has a first frequency and a second component that has a second frequency. The second frequency is higher than the first frequency. An optical output of the tunable optical filter is applied to a photodetector. The electrical output from the photodetector is applied to a lock-in detector. The lock-in detector receives an input from frequency doubling circuitry. An output of the lock-in detector is monitored.
摘要翻译：一种用于增强可调谐滤光器的分辨率的方法和装置。光输入被施加到可调滤波器。电信号被施加到可调谐滤光器。电信号具有具有第一频率的第一分量和具有第二频率的第二分量。第二频率高于第一频率。可调光滤波器的光输出被施加到光电检测器。来自光电检测器的电输出被施加到锁定检测器。锁定检测器从倍频电路接收输入。监控锁定检测器的输出。

7. 发明授权

US08693710B2 Apparatus for preventing leakage of a weak signal from a speaker 有权
标题翻译：用于防止来自扬声器的弱信号的泄漏的装置
公开(公告)号：US08693710B2
公开(公告)日：2014-04-08
申请号：US12506624
申请日：2009-07-21
申请人： Kwang Uk Chu , In Ho Hwang
发明人： Kwang Uk Chu , In Ho Hwang
IPC分类号： H04R25/00 , H03G3/34
CPC分类号： H03G3/34 , H04R3/00
摘要： An apparatus for preventing leakage of a weak signal from a speaker is provided. The apparatus passes a normal speaker drive signal coming through speaker signal lines and blocks a weak signal generated by the sounds around the speaker, thereby preventing wiretapping the speaker.
摘要翻译：提供一种用于防止来自扬声器的弱信号的泄漏的装置。该装置传递通过扬声器信号线的正常扬声器驱动信号，并且阻挡由扬声器周围的声音产生的弱信号，从而防止扬声器被窃听。

8. 发明授权

US07920822B2 Device for preventing eavesdropping through speaker 有权
标题翻译：用于防止通过扬声器窃听的设备
公开(公告)号：US07920822B2
公开(公告)日：2011-04-05
申请号：US12056670
申请日：2008-03-27
申请人： Kwang Uk Chu , In Ho Hwang , Jong Kyu Kim , Sang Woo Cho , Dae Heon Lee
发明人： Kwang Uk Chu , In Ho Hwang , Jong Kyu Kim , Sang Woo Cho , Dae Heon Lee
IPC分类号： H04K3/00
CPC分类号： H04K3/825 , H04K3/42 , H04K3/43 , H04K2203/12
摘要： Provided is a device for preventing eavesdropping through a speaker. More particularly, a device for preventing eavesdropping by transmitting a jamming signal through a speaker common signal line is provided, the device including: a jamming signal generator for generating a jamming signal comprising a noise signal; an amplifier for amplifying the jamming signal; and a transformer for receiving the amplified jamming signal from the amplifier and outputting the amplified jamming signal to a speaker common signal line. The device may transmit a jamming signal in an audible frequency band to the speaker common signal line, thereby rendering conversations unrecognizable to eavesdroppers when an electrical signal induced from a speaker is detected through the speaker common signal line.
摘要翻译：提供了用于防止通过扬声器窃听的设备。更具体地，提供了一种通过将扬声器公共信号线发送干扰信号来防止窃听的装置，该装置包括：干扰信号发生器，用于产生包括噪声信号的干扰信号; 用于放大干扰信号的放大器; 以及用于从放大器接收放大的干扰信号并将放大的干扰信号输出到扬声器公共信号线的变压器。设备可以将扬声器公共信号线中的可听频带中的干扰信号发送到扬声器公共信号线，从而当通过扬声器公共信号线检测到从扬声器感应到的电信号时，使得会话无法识别到窃听器。

9. 发明授权

US5574586A Simultaneous optical compression and decompression apparatus 失效
标题翻译：同时光学压缩和减压装置
公开(公告)号：US5574586A
公开(公告)日：1996-11-12
申请号：US346919
申请日：1994-11-23
申请人： Kwang Uk Chu , Byeong H. Kim , Seo Y. Shin , Ki H. Kim , Yong h. Won
发明人： Kwang Uk Chu , Byeong H. Kim , Seo Y. Shin , Ki H. Kim , Yong h. Won
IPC分类号： H04Q11/00 , H04J3/00 , H04J14/00 , H04J14/02 , H04J14/08 , H04B10/00
CPC分类号： H04J14/083
摘要： A simultaneous optical compression and decompression apparatus having a simple symmetrical arrangement including a plurality of optical splitting/combining units capable of achieving simultaneous splitting and combining of optical signals in opposite directions, a plurality of optical delay units each arranged between adjacent ones of the optical splitting/combining units and adapted to delay the time taken for an optical signal to pass therethrough in each of opposite directions by a predetermined time, so as to reproduce the optical signal in accordance with a predetermined rule. The apparatus also includes a pair of optical isolation units respectively connected to opposite end-side ones of the optical splitting/combining units, each of the optical isolation units being adapted to allow an optical signal to pass therethrough in one direction; a pair of optical switching units respectively connected to opposite end-side ones of the optical splitting/combining units and adapted to switch optical signals output from the optical splitting/combining units in response to control signals, so as to allow predetermined optical signals to pass therethrough; and a pair of control units respectively connected to the optical switching units and adapted to apply the control signals to the optical switching units.
摘要翻译：一种具有简单对称布置的同时光学压缩和解压缩装置，包括能够实现相反方向上的光信号的同时分离和组合的多个光分裂/组合单元，多个光学延迟单元，每个光学延迟单元布置在相邻的光学分割 /组合单元，并且适于将每个相反方向上的光信号通过的时间延迟预定时间，以便根据预定规则再现光信号。该装置还包括一对光隔离单元，其分别连接到光分路/组合单元的相对端侧光隔离单元，每个光隔离单元适于允许光信号在一个方向上通过; 一对光开关单元，分别连接到光分路/组合单元的相对端侧，并且适于响应于控制信号切换从光分路/组合单元输出的光信号，以便允许预定的光信号通过通过以及一对控制单元，其分别连接到所述光开关单元并且适于将所述控制信号施加到所述光开关单元。

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