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公开(公告)号：KR100842297B1
公开(公告)日：2008-06-30
申请号：KR1020070103707
申请日：2007-10-15
Applicant: 한국전자통신연구원
IPC: H01S3/067
Abstract: 본 발명은 별도의 온도 제어 부품의 사용 없이 외부 온도에 무관하게 출력 광파워와 출력 파장이 일정하게 유지될 수 있는 온도 무의존성 외부공진레이저를 제공한다. 그 외부공진레이저는 반도체 증폭기; 브라그 격자(Bragg Grating)가 형성된 코어 및 상기 코어를 감싸는 클래드를 구비한 광섬유; 및 광섬유를 페룰(ferrule)에 고정하고 음의 열광학 계수를 갖는 열경화성 폴리머;를 포함하고, 브라그 격자가 형성된 부분의 코어를 감싸는 클래드의 두께가 다른 부분의 클래드보다 얇게 형성되며, 상기 열경화성 폴리머가 상기 클래드를 감싸고 있다. 본 발명의 외부공진레이저는 별도의 온도 제어 장치를 부착할 필요가 없어서, 소형 및 저가형으로 제작할 수 있기 때문에, 경제적인 WDM 광가입자망 설계에 있어서, DWDM 시스템 광원으로 유용하게 사용될 수 있다.
외부온도 무의존 광원, 외부공진레이저, thin-film 필터, 브라그 격자-
公开(公告)号：KR100734873B1
公开(公告)日：2007-07-03
申请号：KR1020050121985
申请日：2005-12-12
Applicant: 한국전자통신연구원
IPC: H04B10/2581 , H04J14/02 , H04B10/00
CPC classification number: H04J14/02 , H04J14/0221 , H04J14/0226 , H04J14/0227 , H04J14/0246 , H04J14/025 , H04J14/0282
Abstract: 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.
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公开(公告)号：KR1020070062200A
公开(公告)日：2007-06-15
申请号：KR1020050121985
申请日：2005-12-12
Applicant: 한국전자통신연구원
IPC: H04B10/2581 , H04J14/02 , H04B10/00
CPC classification number: H04J14/02 , H04J14/0221 , H04J14/0226 , H04J14/0227 , H04J14/0246 , H04J14/025 , H04J14/0282
Abstract: An apparatus and a method for tracking wavelength in a WDM(Wavelength-Division-Multiplexed) PON(Passive Optical Network) are provided to construct a reliable WDM-PON system by stably transmitting a downlink signal and an uplink signal to a subscriber terminal and a central office, respectively, even with respect to a local base station where power is not supplied. The first wavelength aligning unit multiplexes and aligns output wavelengths of plural single mode light sources at a central office. The second wavelength aligning unit multiplexes and aligns output wavelengths of plural single mode light sources received from a subscriber terminal at a local base station. The third wavelength aligning unit demultiplexes and aligns output wavelengths of the second wavelength aligning unit at the central office.
Abstract translation: 提供了一种用于跟踪WDM（波分多路复用）PON（无源光网络）中的波长的装置和方法，通过向用户终端稳定地发送下行链路信号和上行链路信号来构造可靠的WDM-PON系统， 中央办公室，即使是没有供电的本地基站也是如此。 第一波长对准单元在中心局复用并对准多个单模光源的输出波长。 第二波长对准单元将从用户终端接收的多个单模光源的输出波长复用并对齐在本地基站。 第三波长对准单元在中心局对第二波长对准单元的输出波长进行解复用和对齐。
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4.发明公开반사형 반도체 광증폭기를 이용한 광송수신 모듈, 그모듈을 포함한 수동형 광가입자망 및 그 모듈의 입력광파워 검출방법 有权使用反射半导体光放大器（RSOA）的光学收发器模块，包含相同模块的被动光网络（PON）以及检测相同模块的输入光功率的方法
公开(公告)号：KR1020070059848A
公开(公告)日：2007-06-12
申请号：KR1020060049024
申请日：2006-05-30
Applicant: 한국전자통신연구원
CPC classification number: H04Q11/0067 , H04B10/2914 , H04B10/69 , H04J14/02 , H04Q2011/0079
Abstract: An optical transceiver module using an RSOA(Reflective Semiconductor Optical Amplifier), a PON(Passive Optical Network) having the same, and a method for detecting input optical power therein are provided to enable each ONT(Optical Network Terminal) or a CO(Central Office) to rapidly confirm the optical power of a downstream optical signal inputted to an RSOA and to guarantee reliability in operating a WDM(Wavelength Division Multiplexing)-PON by confirming operation state of the optical transmitter of each ONT. An optical transceiver module(100) in a PON comprising a CO and ONTs comprises an optical receiver(120), an RSOA(111), and an optical power detector(130). The optical receiver(120) receives a downstream optical signal from the CO. The RSOA(111) receives the downstream optical signal, modulates it into an upstream optical signal again, and transmits it. The optical power detector(130) detects the optical power of the downstream optical signal inputted to the RSOA(111).
Abstract translation: 提供了使用RSOA（反射半导体光学放大器）的光收发器模块，具有该光收发器的PON（被动光网络）及其中检测输入光功率的方法，以使每个ONT（光网络终端）或CO 办公室）快速确认输入到RSOA的下行光信号的光功率，并通过确认每个ONT的光发射机的操作状态来确保操作WDM（波分复用）-PON的可靠性。 包括CO和ONT的PON中的光收发器模块（100）包括光接收器（120），RSOA（111）和光功率检测器（130）。 光接收器（120）接收来自CO的下行光信号，RSOA（111）接收下行光信号，再次将其调制成上行光信号，并将其发送。 光功率检测器（130）检测输入到RSOA（111）的下行光信号的光功率。
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公开(公告)号：KR1020060038784A
公开(公告)日：2006-05-04
申请号：KR1020040087926
申请日：2004-11-01
Applicant: 한국전자통신연구원
IPC: H04B10/035 , H04B10/03 , H04B10/2581
CPC classification number: H04J14/0226 , H04B10/2587 , H04B10/27 , H04J14/0246 , H04J14/025 , H04J14/0282 , H04J2014/0253
Abstract: Disclosed herein is an apparatus and method for managing faults of a loop-back Wavelength Division Multiplexing Passive Optical Network (WDM-PON). The apparatus includes a control light source as well as a plurality of light sources in a central office, a loop-back means for transmitting control light to the central office through a remote node optical demultiplexer or remote node optical multiplexer in a remote node, a control light receiver for receiving looped-back control light, and a control unit for maintaining power of the upstream signals, which are received by central office receivers, and power of the control light, which is received by the control light receiver, at a maximum.
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Patent Agency Ranking
公开(公告)号：KR100922727B1
公开(公告)日：2009-10-22
申请号：KR1020070068074
申请日：2007-07-06
Applicant: 한국전자통신연구원
IPC: H04B10/2581 , H04B10/27 , H04B10/00
CPC classification number: H01S5/50 , H01S5/06812 , H04J14/02 , H04J14/0282
Abstract: 본 발명은 광파장에 비의존적인 WDM 수동형 광가입자망을 실현하기 위해서 요구되는 네트워크 구성방식 및 상하향 광통신 장치에 관한 것으로, 파장다중화 수동형 광가입자망 시스템에 있어서, 적어도 하나 이상의 씨앗광원(SL)을 이용하여 파장간격 및 중심파장이 조정된 씨앗광을 생성하는 씨앗광 생성부, 상기 씨앗광생성부로부터 상기 씨앗광을 전달받아 광가입자망의 가입자에게 하향광신호를 전송하고, 상기 가입자로부터 전송된 상향광신호를 수신하는 광선로 종단부(OLT) 및 상기 광선로 종단부로부터 수신된 하향광신호를 상향데이터를 포함하도록 변조한 상향광신호를 전송하는 광네트워크 종단부(ONU)로 구성되어, 소광비를 충분히 높일수 있게 해줌으로써 하향전송의 품질 및 신뢰도를 향상시킬 수 있고, 입력된 하향 광신호를 반도체 광증폭기 내에서 충분히 평탄화시킴으로써 상향전송의 품질 및 신뢰도를 향상시킬 수 있다.
WDM-PON, 광선로 종단 시스템 (OLT), 광네트워크 종단 시스템 (ONU), 파장 비의존 (Wavelength Independent), 다파장 광원 (MWLS), 광대역 광원 (BLS), 광파장 재사용 (Wavelength Reuse), 광신호 평탄화 (Optical Signal Flatting), 선행전류주입 (FFCI)-
公开(公告)号：KR100859713B1
公开(公告)日：2008-09-23
申请号：KR1020060071649
申请日：2006-07-28
Applicant: 한국전자통신연구원
IPC: H01S3/067
Abstract: 본 발명은 별도의 온도 제어 부품의 사용 없이 외부 온도에 무관하게 출력 광파워와 출력 파장이 일정하게 유지될 수 있는 온도 무의존성 외부공진레이저를 제공한다. 그 외부공진레이저는 반도체 증폭기; 브라그 격자(Bragg Grating)가 형성된 코어 및 상기 코어를 감싸는 클래드를 구비한 광섬유; 및 광섬유를 페룰(ferrule)에 고정하고 음의 열광학 계수를 갖는 열경화성 폴리머;를 포함하고, 브라그 격자가 형성된 부분의 코어를 감싸는 클래드의 두께가 다른 부분의 클래드보다 얇게 형성되며, 상기 열경화성 폴리머가 상기 클래드를 감싸고 있다. 본 발명의 외부공진레이저는 별도의 온도 제어 장치를 부착할 필요가 없어서, 소형 및 저가형으로 제작할 수 있기 때문에, 경제적인 WDM 광가입자망 설계에 있어서, DWDM 시스템 광원으로 유용하게 사용될 수 있다.
외부온도 무의존 광원, 외부공진레이저, thin-film 필터, 브라그 격자-
公开(公告)号：KR1020070108422A
公开(公告)日：2007-11-12
申请号：KR1020060102456
申请日：2006-10-20
Applicant: 한국전자통신연구원
IPC: H04B10/00 , H04B10/291 , H04B10/25 , H04B10/2581
CPC classification number: H01S5/50 , H01S5/06812 , H04J14/02 , H04J14/0282
Abstract: An RSOA reusing a downlink optical signal by dynamic current injection and a driving apparatus thereof are provided to adjust dynamically a current injected to the RSOA according to the size of an input optical signal and reduce the residual ER(Extinction Ratio) of the optical signal, thereby reducing the power penalty of uplink transmission and improving transmission quality. An RSOA(Reflective Semiconductor Optical Amplifier)(600) includes a reflecting surface and an optical amplifying semiconductor. The reflecting surface reflects an input optical signal. The optical amplifying semiconductor is positioned in one side of the reflecting surface. The polarity of a first signal is reverse to the polarity of the input optical signal. A second signal modulates the input optical signal reflected from the reflecting surface into an output optical signal. The first and second signals are combined and injected to the optical amplifying semiconductor.
Abstract translation: 提供通过动态电流注入重新使用下行链路光信号的RSOA及其驱动装置，以根据输入光信号的大小动态调整注入RSOA的电流，并减少光信号的残留ER（消光比） 从而降低上行传输的功率损失，提高传输质量。 RSOA（反射半导体光放大器）（600）包括反射表面和光放大半导体。 反射面反射输入光信号。 光放大半导体位于反射面的一侧。 第一信号的极性与输入光信号的极性相反。 第二信号将从反射表面反射的输入光信号调制成输出光信号。 将第一和第二信号组合并注入光放大半导体。
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公开(公告)号：KR1020070074472A
公开(公告)日：2007-07-12
申请号：KR1020070001140
申请日：2007-01-04
Applicant: 한국전자통신연구원
IPC: H04B10/291 , H04B10/25 , H04B10/00
CPC classification number: H01S5/50 , H01S5/06812 , H04J14/02 , H04J14/0282
Abstract: A feed-forward current driver and an SOA(Semiconductor Optical Amplifier) for reusing a downstream optical signal through dynamic current injection are provided to reduce the ER(Extinction Ratio) of an inputted optical signal by dynamically adjusting the current injected to an RSOA(Reflective SOA) according to amplitude of the optical signal. Downstream optical signals from a telephone office are split through an optical coupler(601). Some of the downstream optical signals are inputted to an RSOA(600), and some of them are inputted to a dPD(data Photo Diode)(602). The light inputted to the dPD(602) is changed into current signals. A TIA(Transimpedance Amplifier)(603) amplifies the current signals and converts them into voltage signals. The voltage signals are inputted to an LA(Limiting Amplifier)(604), and they are amplified again. Some of output signals of the LA(604) are inputted to the first RF delay(605). Output signals of the RF delay(605) are inputted to an AND gate(606). Output signals of the AND gate(606) are changed into current signals through the first LDD(LD Driver)(607). Some inputted upstream data signals are inputted to the first LDD(607), and they are changed into current signals. The current signals are combined with bias current. Output signals of the first and second LDDs(607,609) are combined through a signal combiner(610), and the combined signal is injected into an RSOA(600).
Abstract translation: 提供了一种用于通过动态电流注入重新使用下行光信号的前馈电流驱动器和SOA（半导体光放大器），以通过动态调整注入RSOA的电流来减少输入光信号的ER（消光比）（反射 SOA）根据光信号的幅度。 来自电话局的下行光信号通过光耦合器（601）分离。 一些下行光信号被输入到RSOA（600），其中一些信号被输入到dPD（数据光电二极管）（602）。 输入到dPD（602）的光变为电流信号。 TIA（跨阻放大器）（603）放大电流信号并将其转换为电压信号。 电压信号输入到LA（限幅放大器）（604），并再次放大。 LA（604）的一些输出信号被输入到第一RF延迟（605）。 RF延迟（605）的输出信号被输入到与门（606）。 与门（606）的输出信号通过第一LDD（LD驱动器）（607）变为电流信号。 一些输入的上行数据信号被输入到第一LDD（607），并且它们被改变为电流信号。 电流信号与偏置电流组合。 第一和第二LDD（607,609）的输出信号通过信号组合器（610）组合，并且组合的信号被注入到RSOA（600）中。
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公开(公告)号：KR1020060041333A
公开(公告)日：2006-05-11
申请号：KR1020040090327
申请日：2004-11-08
Applicant: 한국전자통신연구원
CPC classification number: H01S5/0612 , H01S5/02284 , H01S5/02415 , F21Y2115/30 , G02B6/4215
Abstract: Disclosed is a wavelength tunable light source module for wavelength division multiplexing passive optical network systems, which is capable of being realizing at low costs, increasing utility of wavelength resources, and facilitating mass production. The wavelength tunable light source module comprising: a temperature adjustment unit for raising or lowering ambient temperature according to heat generation or heat absorption caused by an electrical signal, a support block attached to the temperature adjustment unit and having a structure for fixing a laser diode, and a TO-can type distributed feedback laser diode mounted on the temperature adjustment unit by the support block and having an operation wavelength varied according to the ambient temperature adjusted by the temperature adjustment unit.
Abstract translation: 公开了一种用于波分复用无源光网络系统的波长可调光源模块，其能够以低成本实现，增加波长资源的效用并促进批量生产。 该波长可调光源模块包括：温度调节单元，用于根据由电信号引起的发热或吸热而升高或降低环境温度;附接到温度调节单元的支撑块，并具有用于固定激光二极管的结构; 以及通过支撑块安装在温度调节单元上并具有根据由温度调节单元调节的环境温度而变化的操作波长的TO-can型分布式反馈激光二极管。
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