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1. 发明申请

US20090257743A1 Monitoring of optical transmission systems based on cross-correlation operation 有权
标题翻译：基于互相关运算的光传输系统监控
公开(公告)号：US20090257743A1
公开(公告)日：2009-10-15
申请号：US12081294
申请日：2008-04-14
申请人： Yun Chur Chung , Yuichi Takushima
发明人： Yun Chur Chung , Yuichi Takushima
IPC分类号： H04B17/00 , H04B10/08
CPC分类号： H04B10/071
摘要： In optical communication systems, an optical signal which is modulated with a data signal is transmitted from an optical transmitter, and is launched into a fiber-optic transmission link. The present invention provides a method and an apparatus for the measurement of the distribution of the reflectivity along an optical transmission line implemented by using the signal processing based on the cross-correlation function between the data signal with which the optical transmitter is modulated and the back-reflected signal returned to the optical transmitter to provide the in-service monitoring of the fiber-optic transmission link.
摘要翻译：在光通信系统中，从光发射机发送用数据信号调制的光信号，并发射到光纤传输链路中。本发明提供了一种用于测量沿着光传输线的反射率分布的方法和装置，其通过使用基于调制光发射机的数据信号与背面之间的互相关函数的信号处理反射的信号返回到光发射机，以提供光纤传输链路的在役监测。

2. 发明授权

US07177541B2 OSNR monitoring method and apparatus for the optical networks 失效
标题翻译： OSNR光网络监控方法和装置
公开(公告)号：US07177541B2
公开(公告)日：2007-02-13
申请号：US10148438
申请日：2001-11-09
申请人： Yun-Chur Chung , Jun-Haeng Lee
发明人： Yun-Chur Chung , Jun-Haeng Lee
IPC分类号： H04B10/08
CPC分类号： H04J14/02 , H04B10/07953
摘要： It is disclosed that a method and apparatus that automatically monitors each channel's optical signal-to-noise ration (OSNR) using optical filter and polarization extinction method in wavelength division multiplexing (WDM) scheme-based optical transmission systems. OSNR is simply measured using optical filter by comparing amplified spontaneous emission (ASE) over the signal band, of which bandwidth has changed, while leaving signal intensity intact, with that original signal and, OSNR measurement is allowable over a wider range of OSNR by minimizing the ratio of signal to ASE over the signal band using polarization extinction method.
摘要翻译：公开了一种在基于波分复用（WDM）方案的光传输系统中使用滤光器和偏振消光方法自动监视每个通道的光信噪比（OSNR）的方法和装置。通过比较放大的自发发射（ASE）在带宽已经改变的信号频带上，同时保持信号强度完整的原始信号，并且通过最小化OSNR在更宽范围的OSNR中允许OSNR来简单地测量OSNR 信号与ASE之间的信号频带比采用极化消光法。

3. 发明授权

US06597482B1 Multiplexing/demultiplexing apparatus for wavelength division multiplexed system and wavelength division multiplexed passive optical subscriber networks using the same apparatus 失效
标题翻译：用于波分复用系统的复用/解复用装置和使用相同装置的波分复用无源光用户网络
公开(公告)号：US06597482B1
公开(公告)日：2003-07-22
申请号：US09250212
申请日：1999-02-15
申请人： Yun Chur Chung , Chang Hee Lee , Dae Kwang Jung , Seung Kyun Shin
发明人： Yun Chur Chung , Chang Hee Lee , Dae Kwang Jung , Seung Kyun Shin
IPC分类号： H04J1402
CPC分类号： H04J14/02
摘要： A multiplexing/demultiplexing apparatus used in wavelength division multiplexed passive optical subscriber networks comprises a multiplexing/demultiplexing means each having a natural number N input and output ports, wherein wavelength divided signals in one direction inputted through the N−1 input ports are multiplexed onto one output port, and simultaneously wavelength division multiplexed signals in the other direction inputted through the remainder one input port are demultiplexed onto the remainder N−1 output ports. According to the present invention it is possible to implement economical and efficient wavelength division multiplexed passive optical subscriber networks, by including two WGR's, one at the central office and one at the remote node to perform simultaneous multiplexing and demultiplexing of signals in upstream and downstream, and employing an erbium-doped fiber amplifier to be able to use a low-cost light source such as a light-emitting diode.
摘要翻译：在波分复用无源光用户网络中使用的复用/解复用装置包括：具有自然数N个输入和输出端口的复用/解复用装置，其中通过N-1个输入端口输入的一个方向上的波长分割信号被多路复用到一个输出端口，并且通过其余一个输入端口输入的另一方向的同时波分复用信号被解复用到剩余的N-1个输出端口。根据本发明，通过包括两个WGR，一个在中心局和一个在远程节点处，实现经济有效的波分复用无源光用户网络，以执行上行和下行信号的同时复用和解复用，并且使用掺铒光纤放大器能够使用诸如发光二极管的低成本光源。

4. 发明授权

US08509613B2 Monitoring of optical transmission systems based on cross-correlation operation 有权
公开(公告)号：US08509613B2
公开(公告)日：2013-08-13
申请号：US12081294
申请日：2008-04-14
申请人： Yun Chur Chung , Yuichi Takushima
发明人： Yun Chur Chung , Yuichi Takushima
IPC分类号： H04B10/08
CPC分类号： H04B10/071
摘要： In optical communication systems, an optical signal which is modulated with a data signal is transmitted from an optical transmitter, and is launched into a fiber-optic transmission link. The present invention provides a method and an apparatus for the measurement of the distribution of the reflectivity along an optical transmission line implemented by using the signal processing based on the cross-correlation function between the data signal with which the optical transmitter is modulated and the back-reflected signal returned to the optical transmitter to provide the in-service monitoring of the fiber-optic transmission link.

5. 发明授权

US07881613B2 Wavelength tracking apparatus and method in WDM-PON system 有权
标题翻译： WDM-PON系统中的波长跟踪装置及方法
公开(公告)号：US07881613B2
公开(公告)日：2011-02-01
申请号：US11635701
申请日：2006-12-07
申请人： Byoung Whi Kim , Woo Ram Lee , Yun Chur Chung , Eui Seung Son , Jang Won Chae
发明人： Byoung Whi Kim , Woo Ram Lee , Yun Chur Chung , Eui Seung Son , Jang Won Chae
IPC分类号： H04B10/08
CPC分类号： H04J14/02 , H04J14/0221 , H04J14/0226 , H04J14/0227 , H04J14/0246 , H04J14/025 , H04J14/0282
摘要： Provided are an apparatus and method for tracking a wavelength in a passive optical subscriber network in which a central base station and at least one subscriber terminal are connected via a remote node. The apparatus includes a first wavelength aligning unit multiplexing and aligning wavelengths of optical signals from a plurality of single-mode optical sources of the central base station; a second wavelength aligning unit multiplexing and aligning wavelengths of optical signals transmitted to the remote node from a plurality of single-mode optical sources of the subscriber terminal; and a third wavelength aligning unit demultiplexing and aligning wavelengths of optical signals from the second wavelength aligning unit, the third wavelength aligning unit being included in the central base station. Accordingly, when the wavelengths of passbands of a multiplexer/demultiplexer (MUX/DEMUX) of a remote station change due to a change in the ambient temperature, wavelength tracking is performed by making aligned the wavelengths of optical sources of a central base station, a multiplexer/demultiplexer, and subscriber terminals, thereby minimizing optical channel loss and enabling reliable management of WDM-PON.
摘要翻译：提供了一种用于跟踪无源光用户网络中的波长的装置和方法，其中中央基站和至少一个用户终端经由远程节点连接。该装置包括：第一波长对准单元，复用并对准来自中央基站的多个单模光源的光信号的波长; 第二波长对准单元，从用户终端的多个单模光源复用并对准从远程节点传输的光信号的波长; 以及第三波长对准单元，对来自所述第二波长对准单元的光信号进行解复用和对准波长，所述第三波长对准单元包括在所述中央基站中。因此，当远程站的多路复用器/解复用器（MUX / DEMUX）的通带波长由于环境温度的变化而改变时，通过使中心基站的光源的波长对齐来执行波长跟踪，多路复用器/解复用器和用户终端，从而最小化光信道丢失并实现WDM-PON的可靠管理。

6. 发明授权

US07809227B2 Optical fiber, and optical access network, local area network and optical parts for communication, which use the optical fiber 有权
标题翻译：光纤，光接入网，局域网和用于通信的光部件，使用光纤
公开(公告)号：US07809227B2
公开(公告)日：2010-10-05
申请号：US11918064
申请日：2005-09-23
申请人： Yun Chur Chung , Jun Haeng Lee , Eui Seung Son , Jang won Chae
发明人： Yun Chur Chung , Jun Haeng Lee , Eui Seung Son , Jang won Chae
IPC分类号： G02B6/02
CPC分类号： G02B6/02019 , G02B6/02047 , G02B6/0288 , G02B6/03633
摘要： An optical fiber, and an optical access network, a local area network and optical parts for communication, which uses the optical fiber, are disclosed. The optical fiber whose core diameter is 10 μm˜40 μm has at least two propagation modes in a wavelength over 1200 nm. The optical fiber according to the present invention can reduce packaging costs for optical components, since cross-sectional area of the core is large, compared with the prior art technique adopting a single mode optical fiber, and can transmit ultra-high speed data a relatively long distance, since the mode number and modal dispersion effect of the optical fiber is relatively small, compared with the prior art multimode optical fiber. Also, when using the optical fiber according to the present invention, the optical subscriber network and the local area network can be cost-effectively implemented. In addition, when adopting the optical fiber according to the present invention, productivity of optical components for communication can be improved, costs for an optical component can be reduced and quality of the optical component can be improved.
摘要翻译：公开了一种使用光纤的光纤，光接入网，局域网和用于通信的光部件。芯径为10μm〜40μm的光纤在1200nm以上具有至少两种传播模式。根据本发明的光纤可以降低光学部件的封装成本，因为与使用单模光纤的现有技术相比，芯的横截面积大，并且可以相对地传输超高速数据长距离，由于与现有技术的多模光纤相比，光纤的模数和模态色散效应相对较小。此外，当使用根据本发明的光纤时，可以成本有效地实现光用户网络和局域网。此外，采用本发明的光纤时，能够提高通信用光学部件的生产率，能够降低光学部件的成本，提高光学部件的质量。

7. 发明申请

US20080187314A1 REFLECTIVE SEMICONDUCTOR OPTICAL AMPLIFIER-BASED OPTICAL ACCESS NETWORK SYSTEM HAVING IMPROVED TRANSMISSION QUALITY 审中-公开
标题翻译：具有改进传输质量的反射半导体光学放大器的光学访问网络系统
公开(公告)号：US20080187314A1
公开(公告)日：2008-08-07
申请号：US11850331
申请日：2007-09-05
申请人： Yun Chur CHUNG , Sang Yub KIM , Sang Bae JUN , Seung Pil JUNG
发明人： Yun Chur CHUNG , Sang Yub KIM , Sang Bae JUN , Seung Pil JUNG
IPC分类号： H04J14/00
CPC分类号： H04J14/0226 , H04B10/2587 , H04J14/0227 , H04J14/0246 , H04J14/025 , H04J14/0282 , H04J2014/0253
摘要： Disclosed herein is an optical access network system in which the transmission quality of an upstream signal is remarkably improved in an optical access network in which a Reflective Semiconductor Optical Amplifier (RSOA) is used as the light source for each subscriber. The most important characteristics of the present invention are that a Manchester modulation format is used as a modulation format for a downstream signal in an optical access network system in which an RSOA is used as the light source for each subscriber, so that the problem of deterioration of the transmission quality of a remodulated upstream signal, occurring when an RSOA is used as the light source for each subscriber, is solved, and thus the transmission performance of an upstream signal and the power budget performance of the entire system are improved. According to the present invention, an RSOA-based WDM PON system, in which performance at a power budget and the transmission performance of a remodulated upstream signal are improved, can be implemented.
摘要翻译：这里公开了一种光接入网系统，其中在其中使用反射半导体光放大器（RSOA）作为每个用户的光源的光接入网络中，上行信号的传输质量得到显着改善。本发明的最重要的特征在于，在使用RSOA作为每个用户的光源的光接入网系统中，曼彻斯特调制格式用作下行信号的调制格式，从而出现恶化的问题解决了当RSOA用作每个用户的光源时发生的重新调制的上行信号的传输质量，从而提高了上游信号的传输性能和整个系统的功率预算性能。根据本发明，可以实现其中改善功率预算性能和重调制上行信号的传输性能的基于RSOA的WDM PON系统。

8. 发明授权

US06895185B1 Multi-purpose optical fiber access network 失效
标题翻译：多功能光纤接入网
公开(公告)号：US06895185B1
公开(公告)日：2005-05-17
申请号：US09644910
申请日：2000-08-24
申请人： Yun Chur Chung , Hoon Kim
发明人： Yun Chur Chung , Hoon Kim
IPC分类号： H04B10/272 , H04J14/02 , H04W88/08 , H04B10/20 , H04B10/00 , H04J14/00
CPC分类号： H04J14/0282 , H04B10/272 , H04J14/0226 , H04J14/0232 , H04J14/0246 , H04J14/025 , H04J14/0286 , H04W88/085
摘要： The present invention relates to an optical fiber access network, and more particularly, to a multi-purpose optical fiber access network capable of accepting all services provided by hybrid wireline/wireless access network.According to the present invention, in an optical fiber access network of double star structure where a central office/headend and several optical network units are connected through a splitting/combining device, a multi-purpose optical fiber access network capable of accepting not only wired telephone service, wired CATV and wired data service but also various kinds of wireless services including LMDS, WLL, PCS and so forth, in which LMDS local wireless base station is located in a place adjacent to the splitting/combining device, WLL local wireless base station is located in a place adjacent to the splitting/combining device, optical network unit connects the conventional wired network composed of said optical fiber access network, twisted pair and coaxial cable, telephone service, data service and CATV service are provided through the optical network unit and PCS local wireless base station is located in a place adjacent to the optical network unit, is provided.
摘要翻译：光纤接入网技术领域本发明涉及光纤接入网络，更具体地说，涉及能够接受由混合有线/无线接入网络提供的所有业务的多功能光纤接入网络。根据本发明，在通过分离/组合设备连接中心局/前端和多个光网络单元的双星结构的光纤接入网络中，不仅可以接收有线的多功能光纤接入网络电话服务，有线CATV和有线数据业务，还包括LMDS，WLL，PCS等各种无线业务，其中LMDS本地无线基站位于与分离/组合设备相邻的地方，WLL本地无线基站站位于与分离/组合设备相邻的地方，光网络单元连接由所述光纤接入网络，双绞线和同轴电缆组成的常规有线网络，电话业务，数据业务和有线电视业务通过光网络单元和PCS本地无线基站位于与光网络单元相邻的地方。

9. 发明授权

US06532106B2 All-optical gain controlled bidirectional add/drop optical amplifier 失效
标题翻译：全光增益控制双向放大光放大器
公开(公告)号：US06532106B2
公开(公告)日：2003-03-11
申请号：US09753451
申请日：2001-01-04
申请人： Yun Chur Chung , Chul Han Kim
发明人： Yun Chur Chung , Chul Han Kim
IPC分类号： H04B1012
CPC分类号： H01S3/06754 , H01S3/06704 , H01S3/06758 , H01S3/06787
摘要： A bidirectional add/drop optical amplifier used in wavelength division multiplexing (WDM) optical networks to suppress the power change resulting from the adding and dropping of optical signals using an all optical gain control includes two fiber Bragg gratings (FBGs) and a bidirectional add/drop optical amplifier module composed of an Arrayed Waveguide Grating (AWG) and two bidirectional optical amplifiers. The filtered amplified spontaneous emission (ASE) lights are lased with the two FBGs and then used to adjust the gain of the bidirectional amplifiers.
摘要翻译：用于波分复用（WDM）光网络的双向分插光放大器，用于抑制由全光增益控制增加和丢弃光信号引起的功率变化，包括两个光纤布拉格光栅（FBG）和双向加/ 由放大波导光栅（AWG）和两个双向光放大器组成。经滤波的放大自发发射（ASE）光照两个FBG，然后用于调整双向放大器的增益。

10. 发明授权

US06349103B1 Cold-start wavelength-division-multiplexed optical transmission system 有权
标题翻译：冷启动波分复用光传输系统
公开(公告)号：US06349103B1
公开(公告)日：2002-02-19
申请号：US09473021
申请日：1999-12-28
申请人： Yun-Chur Chung , Jin-Hwan Jang , Seung-Kyun Shin , Hoon Kim , Keun-Joo Park , Kwan-Seop Lee
发明人： Yun-Chur Chung , Jin-Hwan Jang , Seung-Kyun Shin , Hoon Kim , Keun-Joo Park , Kwan-Seop Lee
IPC分类号： H01S310
CPC分类号： H01S5/0687 , H01S5/0617 , H01S5/12 , H01S5/4087 , H04B10/506 , H04B10/564 , H04B10/572
摘要： A cold-start wavelength-division-multiplexed (WDM) optical transmission system uses a synchronized etalon filter, DFB lasers and passive optical demultiplexers. The DFB lasers are tested under normal operating conditions and wavelength-selected for each channel. The wavelength selection is such that the laser operates within one half of the channel spacing from the standardized wavelength. For the cold-start operation, each laser is able to automatically find its operating wavelength without any prior knowledge of its operating conditions for the standardized wavelength. In addition, this system simultaneously adjusts the output power of each laser to a desired value. Also provided is a method for generating standardized frequencies for a wavelength-division-multiplexed optical transmission system, including the step of adjusting the incident angle of an etalon filter by employing two frequency-locked lasers to compensate for differences of the thickness and refractive index of the etalon filter, and the step of fixing the position of the etalon filter to permanently have the adjusted incident angle, the etalon filter having resonant frequencies respectively corresponding to standardized frequencies.
摘要翻译：冷启动波分复用（WDM）光传输系统使用同步标准具滤波器，DFB激光器和无源光解复用器。在正常工作条件下对DFB激光器进行测试，并对每个通道进行波长选择。波长选择使得激光器在距离标准波长的通道间隔的一半范围内工作。对于冷启动操作，每个激光器都能够自动找到其工作波长，而无需事先知道其标准波长的工作条件。此外，该系统同时将每个激光器的输出功率调整到所需的值。还提供了一种用于产生波分复用光传输系统的标准化频率的方法，包括通过采用两个频率锁相激光器来调整标准具滤波器的入射角来补偿厚度和折射率差异的步骤标准具过滤器和固定标准具过滤器的位置的步骤永久地具有调整的入射角，标准具过滤器具有分别对应于标准化频率的谐振频率。

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