公开(公告)号：US07340173B2

公开(公告)日：2008-03-04

申请号：US10776720

申请日：2004-02-11

申请人： Dong-Jae Shin ,  Dae-Kwang Jung ,  Jea-Hyuck Lee ,  Jung-Kee Lee ,  Jeong-Seok Lee ,  Seong-Taek Hwang ,  Yun-Je Oh

发明人： Dong-Jae Shin ,  Dae-Kwang Jung ,  Jea-Hyuck Lee ,  Jung-Kee Lee ,  Jeong-Seok Lee ,  Seong-Taek Hwang ,  Yun-Je Oh

IPC分类号： H04J14/02 ,  H04J14/00

CPC分类号： H04J14/02 ,  H04B10/506

摘要： A WDM (Wavelength Division Multiplexing) optical transmitter using a Fabry-Perot laser is disclosed. The WDM optical transmitter includes a light source for outputting incoherent light of a prescribed wavelength bandwidth, a circulator having the first to the third ports, for outputting the incoherent light received at the first port coupled to the light source to the second port, and outputting an optical signal received at the second port to the third port coupled to the external waveguide, a WGR (Waveguide Grating Router) having a multiplexing port (MP) coupled to the second port of the circulator and a plurality of demultiplexing ports (DPs), for performing WD (Wavelength Division) demultiplexing on the incoherent light received at the MP to output WD-demultiplexed signals to the plurality of DPs, and performing WD multiplexing on a plurality of channel signals received at the plurality of DPs to output WD-multiplexed signals to the MP, and a plurality of FB (Fabry-Perot) lasers respectively connected to the DPs of the WGR, each FP laser is comprised of a laser cavity, an antireflection coating layer deposited at one end of the laser cavity facing a corresponding DP, and a high reflection coating layer deposited at the other end of the laser cavity, whereby an optical injection efficiency increases and an influence of reflected light is reduced, resulting in facilitation of a wavelength-locked phenomenon.

摘要翻译： 公开了一种使用法布里 - 珀罗激光器的WDM（波分复用）​​光发射机。 WDM光发射机包括用于输出规定波长带宽的非相干光的光源，具有第一至第三端口的循环器，用于将耦合到光源的第一端口处接收到的非相干光输出到第二端口，并输出 在第二端口处接收到耦合到外部波导的第三端口的光信号，具有耦合到循环器的第二端口的复用端口（MP）的WGR（波导光栅路由器）和多个解复用端口（DP） 用于对在MP处接收到的非相干光进行WD（波分）解复用，以将WD分离的信号输出到多个DP，并且对在多个DP上接收的多个信道信号执行WD复用以输出WD复用信号 MP和分别连接到WGR的DP的多个FB（Fabry-Perot）激光器，每个FP激光器由激光腔，抗雷 在激光腔的面对相应的DP的一端沉积的吸收层，以及沉积在激光腔的另一端的高反射涂层，由此光注入效率增加并且反射光的影响减小，导致促进 的波长锁定现象。

公开(公告)号：US07187700B2

公开(公告)日：2007-03-06

申请号：US10730568

申请日：2003-12-08

申请人： Dong-Jae Shin ,  Dae-Kwang Jung ,  Jea-Hyuck Lee ,  Jung-Kee Lee ,  Seong-Taek Hwang ,  Yun-Je Oh

发明人： Dong-Jae Shin ,  Dae-Kwang Jung ,  Jea-Hyuck Lee ,  Jung-Kee Lee ,  Seong-Taek Hwang ,  Yun-Je Oh

IPC分类号： H01S3/13

CPC分类号： H04B10/572 ,  H01S5/4006

摘要： Disclosed is a method for maintaining wavelength-locking of a Fabry-Perot laser regardless of a change of external temperature even though a temperature controller is not used, and a wavelength division multiplexing (WDM) light source using the method, as an economical light source used in a WDM optical communication field. The WDM light source comprises a Fabry-Perot laser for injecting spectrum-spliced incoherent light to amplify and output only an oscillation mode matching with a wavelength of the injected light, and a bias controlling unit for adjusting a bias current supplied to the Fabry-Perot laser to a value adjacent to a threshold current of the Fabry-Perot laser, whose threshold current is changed according to a temperature and a relationship between the injected light changed depending to a temperature and a wavelength of the oscillation mode. Therefore, the bias current having a value adjacent to the threshold current of the Fabry-Perot laser is supplied to the Fabry-Perot laser, so that the Fabry-Perot laser can maintain an excellent transmission characteristic regardless of a change of temperature even though a temperature controller is not used.

摘要翻译： 公开了即使不使用温度控制器也能够保持法布里 - 珀罗激光器的波长锁定的方法，而不管外部温度的变化如何，并且使用该方法作为经济光源的波分复用（WDM）光源 用于WDM光通信领域。 WDM光源包括用于注入频谱拼接的非相干光的法布里 - 珀罗激光器，以放大和仅输出与注入的光的波长匹配的振荡模式;以及偏置控制单元，用于调节提供给法布里 - 珀罗 激光到与Fabry-Perot激光器的阈值电流相邻的值，其阈值电流根据温度改变，并且注入的光随温度变化和振荡模式的波长之间的关系而改变。 因此，具有与法布里 - 珀罗激光器的阈值电流相邻的值的偏置电流被提供给法布里 - 珀罗激光器，使得法布里 - 珀罗激光器可以保持优异的传输特性，而不管温度的变化，即使 温度控制器不使用。

公开(公告)号：US07123633B2

公开(公告)日：2006-10-17

申请号：US10691392

申请日：2003-10-22

申请人： Dong-Jae Shin ,  Dae-Kwang Jung ,  Jea-Hyuck Lee ,  Seong-Taek Hwang ,  Yun-Je Oh

发明人： Dong-Jae Shin ,  Dae-Kwang Jung ,  Jea-Hyuck Lee ,  Seong-Taek Hwang ,  Yun-Je Oh

IPC分类号： H01S3/098 ,  H04J14/02

CPC分类号： H04J14/02 ,  H01S5/0268 ,  H01S5/0608 ,  H01S5/0654 ,  H01S5/0656 ,  H01S5/4006 ,  H01S5/4087

摘要： A method for maintaining the mode-locked state of a Fabry-Perot (FP) laser and a WDM light source using the same method for use in WDM optical communication are disclosed. The mode-locked state can be maintained irrespective of temperature change, without use of a temperature controller, by spectrum-slicing the incoherent light generated by a light source element and injecting the spectrum-sliced light to the FP laser, then the FP laser amplifies and outputs only a lasing mode coinciding with the wavelength of the injected light, wherein a lasing-mode interval of the FP laser is set to be less than a 3 dB linewidth of the injected light, so that at least one lasing mode exists inside the 3 dB linewidth of the injected light irrespective of changes in external temperature.

摘要翻译： 公开了一种使用与WDM光通信相同的方法来维持法布里 - 珀罗（FP）激光器和WDM光源的锁模状态的方法。 通过对光源元件产生的非相干光进行频谱分片，并将光谱切片光注入到FP激光器中，不管温度变化如何，可以保持模式锁定状态而不使用温度控制器，然后FP激光放大 并且仅输出与注入的光的波长一致的激光模式，其中FP激光器的激光模式间隔被设置为小于注入的光的3dB线宽，使得至少一个激光模式存在于 不管外部温度的变化，注入光线的3dB线宽。

公开(公告)号：US07295778B2

公开(公告)日：2007-11-13

申请号：US10713393

申请日：2003-11-14

申请人： Jea-Hyuck Lee ,  Seong-Taek Hwang ,  Yun-Je Oh ,  Dae-Kwang Jung

发明人： Jea-Hyuck Lee ,  Seong-Taek Hwang ,  Yun-Je Oh ,  Dae-Kwang Jung

IPC分类号： H04J14/00

CPC分类号： H04J14/0282 ,  H04B10/2503 ,  H04B10/40 ,  H04J14/02 ,  H04J14/0226 ,  H04J14/0246 ,  H04J14/025 ,  H04Q11/0067 ,  H04Q2011/0016

摘要： Disclosed is a wavelength division multiplexed passive optical network (WDM PON) system including a central office, a remote Node, and an optical fiber coupled between the central office and the remote node, wherein the central office includes an optical power splitter coupled to the optical fiber, wherein the optical power splitter (1) divides an upstream optical signal from the optical fiber into a plurality of upstream optical signals having substantially similar power and (2) outputs downstream optical signals to the optical fiber, and a plurality of optical transceiver modules to (1) receive the plurality of upstream optical signals, and (2) output the downstream optical signals to the optical power splitter, and wherein at least one of the optical transceiver modules having an optical transmitter including a semiconductor optical amplifier and a reflection-type optical fiber grating located at a predetermined distance from the semiconductor optical amplifier, the optical transmitter transmitting light of a pre-set wavelength resonating between the SOA and reflection-type optical fiber grating; and wherein at least one of the optical transceiver modules having an optical receiver having an optical fiber grating for transmitting light of a predetermined wavelength and an optical detector for detecting light passing through the optical fiber grating.

摘要翻译： 公开了一种波分复用无源光网络（WDM PON）系统，包括中心局，远程节点和耦合在中心局与远程节点之间的光纤，其中中心局包括耦合到光学器件的光功率分配器 光纤，其中所述光功率分配器（1）将来自所述光纤的上行光信号划分成具有基本相似功率的多个上游光信号，以及（2）向所述光纤输出下行光信号，以及多个光收发模块 （1）接收多个上游光信号，以及（2）将下行光信号输出到光功率分配器，并且其中至少一个光收发模块具有光发射机，该光发射机包括半导体光放大器和反射 - 位于与半导体光放大器预定距离的光纤光栅，光发射 传输在SOA和反射型光纤光栅之间谐振的预设波长的光; 并且其中所述光收发器模块中的至少一个具有光接收器，所述光接收器具有用于透射预定波长的光的光纤光栅和用于检测通过所述光纤光栅的光的光学检测器。

公开(公告)号：US20060222365A1

公开(公告)日：2006-10-05

申请号：US11395099

申请日：2006-03-31

申请人： Dae-Kwang Jung ,  Seong-Taek Hwang ,  Yun-Je Oh ,  Jin-Woo Park ,  Il-Rae Kim

发明人： Dae-Kwang Jung ,  Seong-Taek Hwang ,  Yun-Je Oh ,  Jin-Woo Park ,  Il-Rae Kim

IPC分类号： H04J14/00

CPC分类号： H04J14/0226 ,  H04J14/0247 ,  H04J14/0252 ,  H04J14/0282 ,  H04J14/0298

摘要： A SCM-PON using WDM includes: an OLT for transferring downstream data from an external service provider through downstream optical signals and transferring upstream data transferred through upstream optical signals to an outside; an ODN for distributing the downstream optical signals from the OLT and multiplexing the upstream optical signals to the OLT; and a plurality of ONUs for processing the downstream optical signals transferred from the OLT through the ODN and transferring upstream data of subscribers for the OLT through the upstream optical signals, wherein the optical signals between the OLT and the ONUs are divided into wavelength channels with different wavelengths and sub-carrier channels obtained by time-dividing the wavelength channels, and the upstream data and the downstream data are transferred through the sub-carrier channels.

摘要翻译： 使用WDM的SCM-PON包括：OLT，用于通过下行光信号从外部服务提供商传送下行数据，并将通过上行光信号传送的上行数据传送到外部; 用于分配来自OLT的下行光信号并将上行光信号复用到OLT的ODN; 以及多个ONU，用于处理从OLT通过ODN传送的下行光信号，并通过上行光信号传输OLT的用户的上行数据，其中OLT和ONU之间的光信号被分成不同的波长信道 通过时分波长信道获得的波长和子载波信道，并且上行数据和下行数据通过子载波信道传送。

公开(公告)号：US20050074240A1

公开(公告)日：2005-04-07

申请号：US10778426

申请日：2004-02-13

申请人： Dae-Kwang Jung ,  Yun-Je Oh ,  Seong-Taek Hwang

发明人： Dae-Kwang Jung ,  Yun-Je Oh ,  Seong-Taek Hwang

IPC分类号： H04B10/24 ,  H04B10/207 ,  H04J14/02 ,  H04J14/00

CPC分类号： H04J14/0226 ,  H04J14/02 ,  H04J14/0246 ,  H04J14/025 ,  H04J14/0282

摘要： An economical wavelength-division-multiplexed passive optical network (WDM-PON) system is realized by directly modulating a wavelength-seeded light source to transmit upstream or downstream data, without using an expensive external modulator. A multiplexed signal having the same wavelength as the waveguide grating is generated and used to control the temperature of the waveguide grating and adjust the wavelength of a wavelength-division-multiplexed signal routed to a transfer link. The wavelength selectivity and stabilization of each light source are not required. Since upstream and downstream signals can be multiplexed and demultiplexed concurrently by each waveguide grating located in the central office and the remote node, it is possible to reduce the number of waveguide gratings used in a WDM optical network. In addition, upstream and downstream signals can be transmitted concurrently using a single-strand transfer optical fiber, thereby realizing an economical and efficient WDM-PON.

摘要翻译： 通过直接调制波长种子光源来传输上游或下游数据，实现了经济的波分复用无源光网络（WDM-PON）系统，而不需要昂贵的外部调制器。 产生具有与波导光栅相同波长的多路复用信号，并用于控制波导光栅的温度并调节路由到传输链路的波分复用信号的波长。 不需要每个光源的波长选择性和稳定性。 由于可以通过位于中心局和远程节点中的每个波导光栅同时复用和解复用上游和下行信号，所以可以减少在WDM光网络中使用的波导光栅的数量。 此外，可以使用单股传输光纤同时传输上行和下行信号，从而实现经济高效的WDM-PON。

公开(公告)号：US20050047785A1

公开(公告)日：2005-03-03

申请号：US10818194

申请日：2004-04-05

申请人： Seong-Taek Hwang ,  Dae-Kwang Jung ,  Hoon Kim ,  Yun-Je Oh ,  Chang-Sup Shim

发明人： Seong-Taek Hwang ,  Dae-Kwang Jung ,  Hoon Kim ,  Yun-Je Oh ,  Chang-Sup Shim

IPC分类号： G02B6/42 ,  H04B10/00 ,  H04B10/272 ,  H04J14/00 ,  H04J14/02 ,  H04L12/28 ,  H04L12/44

CPC分类号： H04J14/0282 ,  G02B6/4246 ,  H04J14/0226 ,  H04J14/0246 ,  H04J14/025 ,  H04J2014/0253

摘要： A bi-directional WDM-PON and a method for allocating a wavelength band are disclosed. In the bi-directional WDM-PON, bi-directional transceiver modules are used to transmit optical signals of different wavelengths in the upstream and downstream directions. An L-band and an S-band are used to allocate wavelength bands to the upstream and downstream optical signals so that a wavelength band interval at which the respective wavelength bands of the upstream and downstream optical signals are spaced is set between 50 nm to 150 nm.

摘要翻译： 公开了双向WDM-PON和分配波长带的方法。 在双向WDM-PON中，双向收发模块用于在上行和下行方向传输不同波长的光信号。 使用L波段和S波段将波长带分配给上游和下游光信号，使得上游和下游光信号的相应波长带间隔开的波长带间隔设置在50nm至150nm nm。

公开(公告)号：US20050025484A1

公开(公告)日：2005-02-03

申请号：US10781006

申请日：2004-02-18

申请人： Dae-Kwang Jung ,  Yun-Je Oh ,  Seong-Taek Hwang

发明人： Dae-Kwang Jung ,  Yun-Je Oh ,  Seong-Taek Hwang

IPC分类号： H04J14/00 ,  H04B10/27 ,  H04B10/272 ,  H04B10/54 ,  H04B10/572 ,  H04J14/02

CPC分类号： H04B10/2587 ,  H04J14/02 ,  H04J14/0226 ,  H04J14/0232 ,  H04J14/0246 ,  H04J14/025 ,  H04J14/0282 ,  H04J2014/0253

摘要： A wavelength-division-multiplexed passive optical network using an economical multi-wavelength lasing source and a reflective optical amplification device is disclosed. The wavelength-division-multiplexed passive optical network includes a central office in which a multi-wavelength lasing source is located; a plurality of subscriber terminals for transmitting an upward signal by a refection signal of a multi-wavelength signal transmitted from the central office; and a local office, which is connected among the central office and the subscriber terminals through transmission optical fibers, for demultiplexing the multi-wavelength signal transmitted from the central office and transmitting the demultiplexed signal to the subscriber terminals, and for multiplexing signals inputted from each of the subscriber terminals and transmitting the multiplexed signals to the central office.

摘要翻译： 公开了一种使用经济的多波长激光源和反射光放大装置的波分复用无源光网络。 波分复用无源光网络包括多波长激光源所在的中心局; 多个用户终端，用于通过从中心局发送的多波长信号的反射信号发送上行信号; 以及通过发送光纤连接在中心局和用户终端之间的本地办公室，用于对从中心局发送的多波长信号进行解复用，并将解复用的信号发送到用户终端，并且用于复用从每个 并将复用的信号发送到中心局。

公开(公告)号：US07254340B2

公开(公告)日：2007-08-07

申请号：US10780132

申请日：2004-02-17

申请人： Dae-Kwang Jung ,  Yun-Je Oh ,  Seong-Taek Hwang

发明人： Dae-Kwang Jung ,  Yun-Je Oh ,  Seong-Taek Hwang

IPC分类号： H04J14/02 ,  H04B10/00

CPC分类号： H04J14/0282 ,  H04B10/2587 ,  H04B10/506 ,  H04B10/572 ,  H04J14/02 ,  H04J14/0226 ,  H04J14/0246 ,  H04J14/025 ,  H04J2014/0253

摘要： An optical wavelength tracking apparatus and method in a wavelength division multiplexed (WDM) passive optical network (PON) in which a central office (CO) having a multi-frequency light source is connected to a plurality of optical network units (ONUs) having loop-back light sources through a WDM MUX/DEMUX in a remote node (RN). The power levels of downstream and upstream WDM optical signals are measured. The WDM wavelengths of the multi-frequency light source and the WDM MUX/DEMUX are controlled to be nearly identical in order to minimize the difference between the power levels of the downstream and upstream WDM optical signals.

摘要翻译： 一种波分复用（WDM）无源光网络（PON）中的光波长跟踪装置和方法，其中具有多频光源的中心局（CO）连接到具有环路的多个光网络单元（ONU） 通过远程节点（RN）中的WDM MUX / DEMUX来返回光源。 测量下行和上行WDM光信号的功率电平。 控制多频光源和WDM MUX / DEMUX的WDM波长几乎相同，以便最小化下行和上行WDM光信号的功率电平之间的差异。

公开(公告)号：US20060104636A1

公开(公告)日：2006-05-18

申请号：US11281761

申请日：2005-11-17

申请人： Dae-Kwang Jung ,  Chang-Sup Shim ,  Yun-Je Oh ,  Seong-Taek Hwang

发明人： Dae-Kwang Jung ,  Chang-Sup Shim ,  Yun-Je Oh ,  Seong-Taek Hwang

IPC分类号： H04B10/20

CPC分类号： H04J14/0291 ,  H04J14/0227 ,  H04J14/0241 ,  H04J14/0282 ,  H04J14/0283

摘要： A bi-directional metro-access optical network includes a central office for generating beams of different wavelength bands and a plurality of wavelength locked downward optical signals and for detecting wavelength locked upward optical signals; a plurality of nodes for detecting the downward optical signals of different wavelengths and for generating the wavelength locked upward optical signals of which wavelengths are locked by respective wavelength beams; a first optical fiber line for linking together each of the nodes with the central office in a ring shape, transmitting the upward optical signals to the central office, and transmitting the downward optical signals and the beams to each of the nodes; and a second optical fiber line for linking together each of the nodes with the central office in a ring shape along the circumference of the first optical fiber line.

摘要翻译： 双向地铁接入光网络包括用于产生不同波长带的波束和多个波长锁定的向下的光信号的中心局和用于检测波长锁定的向上的光信号; 多个节点，用于检测不同波长的向下的光信号，并产生波长锁定的上行光信号，波长由各波长波束锁定; 用于将每个节点与中心局以环形形式连接在一起的第一光纤线路，将向上的光信号传输到中心局，并将向下的光信号和光束传输到每个节点; 以及第二光纤线路，用于将每个节点与中心局沿着第一光纤线路的圆周以环形形状连接在一起。