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公开(公告)号：KR1020050117042A
公开(公告)日：2005-12-14
申请号：KR1020040042214
申请日：2004-06-09
Applicant: 한국전자통신연구원
IPC: H04B10/2581 , H04B10/572
CPC classification number: H04J14/0282 , H04J14/02 , H04J14/0226 , H04J14/0246 , H04J14/025
Abstract: 파장분할다중방식 수동형 광가입자망 시스템 및 광원 생성 방법이 개시된다.중앙 기지국은 지역 기지국의 다중화 필터의 주기 간격과 일치하는 모드 간격을 가지며 광가입자단의 상향 전송 광신호를 제어하는 멀티모드 광을 생성하고, 지역 기지국은 멀티모드 광을 다중화 필터를 통해 다중화하여 광가입자단으로 전송하고, 상향 전송 광신호를 역다중화하여 중앙 기지국으로 전송하며, 광가입자단은 다중화된 멀티모드 광을 주입광원으로 하는 페브리-페롯 레이저를 통해 데이터를 변조하여 상향 전송 광신호를 생성한다. 이로써, 중앙 기지국에서 생성한 주입 광원을 이용하여 광가입자단 송신부의 파장 제어가 가능하다.
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公开(公告)号：KR1020040077055A
公开(公告)日：2004-09-04
申请号：KR1020030012444
申请日：2003-02-27
Applicant: 한국전자통신연구원
IPC: G02B6/42
CPC classification number: G01B11/272
Abstract: PURPOSE: An optical alignment system using visible rays and images and an aligning method thereof are provided to perform an optical alignment process within a short period of time by using a light source of wavelengths of a visible ray region and a lensed fiber. CONSTITUTION: A first light source(200) is used for providing wavelengths of visible rays. A second light source(210) is used for providing a wavelength of an infrared region. A micrometer stage(230) is used for aligning output beams of the first and the second light sources to a light receiving part of an optical receiver. A lensed fiber(240) is connected to the micrometer stage in order to input the light into receiving part of the optical receiver. An identification unit identifies visually the aligning state of the output beams of the lensed fiber. An image information acquisition unit is connected to the identification unit in order to obtain the image information. A control circuit(280) is used for operating the micrometer stage by using the obtained image information.
Abstract translation: 目的：提供使用可见光和图像的光学对准系统及其对准方法，以通过使用可见光区域和透镜光纤的波长的光源在短时间内执行光学对准过程。 构成：第一光源（200）用于提供可见光线的波长。 第二光源（210）用于提供红外区域的波长。 微米级（230）用于将第一和第二光源的输出光束对准光接收器的光接收部分。 透镜光纤（240）连接到千分尺级，以将光输入光接收器的接收部分。 识别单元目视识别透镜光纤的输出光束的对准状态。 图像信息获取单元连接到识别单元以获得图像信息。 控制电路（280）用于通过使用获得的图像信息来操作千分尺级。
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公开(公告)号：KR1020030088566A
公开(公告)日：2003-11-20
申请号：KR1020020026225
申请日：2002-05-13
Applicant: 한국전자통신연구원
IPC: H04B10/25 , H04B10/2581
CPC classification number: G02B6/356 , G02B6/293 , H04J14/0204 , H04J14/0205 , H04Q11/0005
Abstract: PURPOSE: An optical cross connect unit is provided to prevent signal distortion caused by insertion loss without changing an optical signal into an electric signal, and not to introduce an additional equipment for signal conversion, thereby implementing a flexible optical cross connect unit. CONSTITUTION: A tunable optical coupler/distributor(140) has 4 ports, couples inputted optical signals with 2 ports, and distributes/transmits the coupled signals to the other 2 ports. The first to the fourth wavelength selectors(150,160,170,180) are coupled with each port of the tunable optical coupler/distributor(140), and reflect or transmit the optical signals. The first circulating unit(110) is coupled with the first input port(IP1), the first output port(OP1), and the first/second wavelength selectors(150,160), and circulates the incident optical signals. The second circulating unit(120) is coupled with the second input port(IP2), the second output port(OP2), and the third wavelength selector(170), and circulates the optical signals. The third circulating unit(130) is coupled with the third input port(IP3), the third output port(OP3), and the fourth wavelength selector(180), and circulates the optical signals.
Abstract translation: 目的：提供光交叉单元，以防止插入损耗引起的信号失真，而不会将光信号变为电信号，而不会引入附加的信号转换设备，从而实现柔性光交叉连接单元。 构成：可调光耦合器/分配器（140）具有4个端口，将输入的光信号与2个端口相连，并将耦合的信号分配/发送到其他2个端口。 第一至第四波长选择器（150,160,170,180）与可调光耦合器/分配器（140）的每个端口耦合，并且反射或发送光信号。 第一循环单元（110）与第一输入端口（IP1），第一输出端口（OP1）和第一/第二波长选择器（150,160）耦合，并且使入射光信号循环。 第二循环单元（120）与第二输入端口（IP2），第二输出端口（OP2）和第三波长选择器（170）耦合，并使光信号循环。 第三循环单元（130）与第三输入端口（IP3），第三输出端口（OP3）和第四波长选择器（180）耦合，并使光信号循环。
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公开(公告)号：KR1020030045958A
公开(公告)日：2003-06-12
申请号：KR1020010075889
申请日：2001-12-03
Applicant: 한국전자통신연구원
IPC: H04B10/2507 , H04B10/25
CPC classification number: H04B10/2525 , H04B10/291 , H04J14/0204 , H04J14/0205
Abstract: PURPOSE: A bidirectional dispersion compensator is provided to compensate dispersion of bidirectional optical signals by using the one dispersion compensator, thereby minimizing the number of optical components and reducing size of an entire system. CONSTITUTION: An optical input/output unit(200) inputs and outputs many multiplexed wavelengths. Two ports of the first optical coupler/distributor(210) are connected to the optical input/output unit(200), and the first optical coupler/distributor(210) couples light incident from the two ports, and distributes the coupled light into two lights having the same power, then outputs the lights to other two ports as performing a reverse operation. One port of a phase controller(220) is connected to one of the other ports of the coupler/distributor(210), and the phase controller(220) controls a phase of light incident from the connected port, and performs a reverse operation. One of three ports of the second optical coupler/distributor(230) is connected to the other port of the phase controller(220). The other port of the second optical coupler/distributor(230) is connected to the rest ports of the two ports of the first optical coupler/distributor(210). The second optical coupler/distributor(230) couples light incident from each port, outputs the coupled lights to the rest one port, and performs a reverse operation. A dispersion compensator(240) compensates dispersion of the light incident from the second optical coupler/distributor(230), reflects the compensated light, and outputs the light to the second optical coupler/distributor(230).
Abstract translation: 目的：提供双向色散补偿器，通过使用一个色散补偿器来补偿双向光信号的色散，从而最大限度地减少光学元件的数量并减小整个系统的尺寸。 构成：光输入/输出单元（200）输入和输出许多复用波长。 第一光耦合器/分配器（210）的两个端口连接到光输入/输出单元（200），并且第一光耦合器/分配器（210）耦合从两个端口入射的光，并将耦合的光分配到两个 具有相同功率的灯，然后将光输出到其他两个端口，执行反向操作。 相位控制器（220）的一个端口连接到耦合器/分配器（210）的其它端口之一，并且相位控制器（220）控制从所连接的端口入射的光的相位，并执行反向操作。 第二光耦合器/分配器（230）的三个端口中的一个连接到相位控制器（220）的另一个端口。 第二光耦合器/分配器（230）的另一个端口连接到第一光耦合器/分配器（210）的两个端口的其余端口。 第二光耦合器/分配器（230）耦合从每个端口入射的光，将耦合的光输出到其余一个端口，并执行反向操作。 色散补偿器（240）补偿从第二光耦合器/分配器（230）入射的光的色散，反射补偿光，并将光输出到第二光耦合器/分配器（230）。
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