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公开(公告)号：KR101788628B1
公开(公告)日：2017-10-23
申请号：KR1020150187846
申请日：2015-12-28
Applicant: 한국과학기술원
Abstract: 본발명은데이터센터등 대용량광전송이요구되는곳에서적용될수 있는단위면적당 전송용량을증대하기위한리본광섬유에대해개시한다. 본발명의가장큰 특징은리본광섬유를구성하고있는각 광섬유가기존의광섬유와비교하여크게소형화되었다는점이다. 기존광섬유대비단면적이약 40% 이상감소시킬수 있기에비용이많이소모되는추가적인공간확보를최소화하면서도광 전송망의전송용량을증대시킬수 있다는장점이있다. 또한본 발명에따른소형화된광섬유는기존의광섬유와유사한광전송특성, 기계적신뢰도등을가지고있으며서로용이한접속이가능하므로호환성이우수하다. 특히비교적제조가간단한디프레스드클래딩인덱스프로파일(depressed cladding index profile)을사용하면서도각 수치의최적화를통해각종광섬유의특성들이광통신망에적합하도록설계하였다. 따라서기존광통신망에서사용되었던각종장치및 광소자를그대로사용하면서전송용량증대의효과를극대화할수 있으며, 이는차세대광 네트워크확충을위한경제적인방안이될 수있다.
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公开(公告)号：KR101559521B1
公开(公告)日：2015-10-14
申请号：KR1020130038989
申请日：2013-04-10
Applicant: 한국과학기술원
IPC: H04B10/07
CPC classification number: H04B10/07953
Abstract: 소프트웨어기반의동기화된진폭히스토그램을이용한광신호의품질감시방법및 장치에대해개시한다. 본발명의가장큰 특징은광신호를직접검파방식으로수신하여광전류를검출하고, 검출한광전류를광신호의심볼속도보다현저하게느린속도로비동기샘플한후, 소프트웨어기반의동기화방법을이용하여클럭신호를추출하여동기화된진폭히스토그램을이용하여광신호의품질을감시한다는것이다. 본발명에의하면, 종래의비동기화된진폭히스토그램을이용한광신호의품질감시장치대신동기화된진폭히스토그램을이용함으로써감시정확도를크게개선할수 있을뿐만아니라, 동기화된진폭히스토그램을획득함에있어서상대적으로낮은속도에서동작하는샘플링회로를사용하며클럭신호를추출하기위한별도의회로대신소프트웨어기반의동기화방법을사용함으로써경제적인구현이가능하다.
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63.发明授权
公开(公告)号：KR101101859B1
公开(公告)日：2012-01-05
申请号：KR1020100068068
申请日：2010-07-14
Applicant: 한국과학기술원
IPC: H04B10/035 , H04B10/2581 , H04J14/02
Abstract: PURPOSE: An optical loop-back system and wavelength division multiple passive optical network using the same are provided to stably maintain the polarization light of a signal in a receiver by reducing the change of polarized light by an optical cable. CONSTITUTION: A 45 degree polarization unit(122) is installed in a subscriber device(120). The 45 degree polarization unit offsets the polarization change of an upward signal. The 45 degree polarization unit is a Faraday rotator. A reflective optical modulator(121) is a reflective semiconductor optical amplifier, a laser diode, and a reflective electronic absorption modulator. The 45 degree polarization unit is installed in the front side of the reflective optical convertor.
Abstract translation: 目的：提供一种使用其的光回环系统和波分多无源光网络，以通过减少光缆的偏振光的变化来稳定地维持接收机中信号的偏振光。 构成：45度偏振单元（122）安装在用户设备（120）中。 45度偏振单元抵消向上信号的偏振变化。 45度偏振单元是法拉第旋转器。 反射式光学调制器（121）是反射半导体光放大器，激光二极管和反射型电子吸收调制器。 45度偏振单元安装在反射光学转换器的正面。
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公开(公告)号：KR101098588B1
公开(公告)日：2011-12-27
申请号：KR1020100051336
申请日：2010-05-31
Applicant: 한국과학기술원
IPC: H04B10/07 , H04B10/2507
Abstract: 편광다중화방식을이용하는광신호의광신호대잡음비감시방법에관하여개시한다. 본발명의방법은, 편광다중화된광신호의광신호대 잡음비를감시하기위하여, 편광다중화된광신호를편광다이버시티코히어런트믹싱을통해수신하고, 비동기식지연탭 샘플링기술을이용하여샘플링된표본들의크기히스토그램으로부터구해진크기품질지수를이용하여광신호대잡음비를감시하는것을특징으로한다. 광링크에존재하는편광모드분산및 편광의존손실을무시할수 없을때 이에의해코히어런트누화가발생할수 있는데, 이러한누화의영향은유니터리(unitary) 행렬변환방법을이용하여효과적으로제거될수 있다.
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65.发明公开
公开(公告)号：KR1020110132776A
公开(公告)日：2011-12-09
申请号：KR1020100052304
申请日：2010-06-03
Applicant: 한국과학기술원
IPC: H04B10/2581
Abstract: PURPOSE: A transmission loss control method for increasing transmission range is provided to increase the transmission range which is capable of using a transmission loss control from a local base station to a subscriber device. CONSTITUTION: A transmission loss device is embedded in order to generate additional loss according to the transmission distance of a subscriber device from the RN to increase transmission distance range from an RN(Remote Node)(130). The transmission loss device is installed between the RN and the subscriber device in order to exist in transmission loss of the subscriber device from the RN. The transmission loss device controls the loss of RN and the subscriber device.
Abstract translation: 目的：提供用于增加传输范围的传输损耗控制方法，以增加能够使用从本地基站到用户设备的传输损失控制的传输范围。 构成：嵌入传输损耗设备，以便根据用户设备从RN的传输距离产生额外的丢失，以增加来自RN（远程节点）（130）的传输距离范围。 传输损耗设备安装在RN和用户设备之间，以便从RN接收用户设备的传输丢失。 传输丢失设备控制RN和用户设备的丢失。
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Patent Agency Ranking
公开(公告)号：KR101068414B1
公开(公告)日：2011-09-29
申请号：KR1020100001571
申请日：2010-01-08
Applicant: 한국과학기술원
IPC: H04B10/07
Abstract: 광신호의 성능 감시 방법에 관하여 개시한다. 본 발명의 방법은, 변조된 광신호의 성능을 감시하기 위하여, 광신호를 코히어런트 믹싱을 통해 수신하고, 비동기식 지연 탭 샘플링 기술을 이용하여 샘플링된 표본들의 크기 히스토그램으로부터 구해진 크기 품질지수와 위상 히스토그램으로부터 구해진 위상 품질지수로부터 광신호의 비트오율을 감시하는 것을 특징으로 한다. 본 발명에 의하면, 광신호의 크기와 위상에 대한 정보를 모두 수집하여 잡음 분포를 분석하여 비트 오율을 감시하므로 변조 방식에 관계없이, 즉 세기변조방식, 위상변조 또는 QAM 방식의 광신호의 비트 오율을 감시할 수 있다.
Abstract translation: 将描述用于监视光信号的性能的方法。 本发明的方法的特征在于通过相干混合接收光信号以监测调制光信号的性能，并且使用异步延迟抽头采样技术从采样采样的大小直方图中测量幅度质量指数和相位 根据从直方图获得的相位质量指数来监测光信号的误码率。 根据本发明，如此收集来分析的两个上的幅度和所述光信号的相位的信息的噪声分布的光信号的误码率监视误码率，无论调制方法，即，强度调制，相位调制，或者QAM方法 可以被监控。
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公开(公告)号：KR1020110090045A
公开(公告)日：2011-08-10
申请号：KR1020100009612
申请日：2010-02-02
Applicant: 한국과학기술원
IPC: H04B10/071 , H04B10/25
Abstract: PURPOSE: An in-service monitoring method of optical transmission system and apparatus thereof are provided to improve measurement accuracy and dynamic range by selecting a PN signal having characteristics correlation. CONSTITUTION: A PN(pseudorandom noise) signal is created by PN signal generator(104). The pseudorandom noise signal is superposed in an output light signal of an optical transmitter(110). The optical signal which is back reflected and transmitted to the optical transmitter is sensed and changed to an electric signal. A cross correlation function(160) is calculated at a back reflection optical signal based on the PN signal. A spray rate is calculated from optical transmission apparatus at a calculated cross correlation function.
Abstract translation: 目的：提供光传输系统的在线监测方法及其装置，通过选择具有特征相关性的PN信号来提高测量精度和动态范围。 构成：由PN信号发生器（104）产生PN（伪随机噪声）信号。 伪随机噪声信号叠加在光发射器（110）的输出光信号中。 被反射并传输到光发射机的光信号被感测并变为电信号。 在基于PN信号的反向反射光信号中计算互相关函数（160）。 在计算的互相关函数下，从光传输装置计算出喷射速率。
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公开(公告)号：KR1020090106785A
公开(公告)日：2009-10-12
申请号：KR1020080032134
申请日：2008-04-07
Applicant: 한국과학기술원
CPC classification number: H01S5/0607 , H04B10/503 , H04J14/02
Abstract: PURPOSE: A method for controlling a bias current of a semiconductor laser device and a communication network using the same are provided to increase a usable wavelength range and a temperature range of an optical subscriber network without temperature control, thereby economically increasing transmission capacity, transmission distance and the number of subscribers. CONSTITUTION: A communication network includes a central base station, an intermediate node, a semiconductor optical device(10), a temperature measuring device and a bias control unit(30). The central base station includes a multiplexer or an inverse multiplexer. The multiplexer and the inverse multiplexer multiplex and simultaneously transmit downward optical signals with different wavelengths and receive upward optical signals to inversely multiplex. The intermediate node receives downward optical signal from the central base station, inversely multiplexes the downward optical signals per a wavelength and transmit them to respective subscriber devices.
Abstract translation: 目的：提供一种用于控制半导体激光装置和使用其的通信网络的偏置电流的方法，以增加光用户网络的可用波长范围和温度范围而不进行温度控制，从而经济地增加传输容量，传输距离 和订阅者数量。 构成：通信网络包括中央基站，中间节点，半导体光学装置（10），温度测量装置和偏置控制单元（30）。 中央基站包括多路复用器或反相多路复用器。 多路复用器和反相多路复用器多路复用并同时发送具有不同波长的向下光信号，并接收向上的光信号进行反向复用。 中间节点从中央基站接收向下的光信号，对每一个波长反向复用下行光信号并将它们发送到各个用户设备。
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公开(公告)号：KR100610245B1
公开(公告)日：2006-08-09
申请号：KR1020040093566
申请日：2004-11-16
Applicant: 한국과학기술원
IPC: H04B10/03 , H04B10/2581
CPC classification number: H04J14/0295 , H04J14/0226 , H04J14/0246 , H04J14/025 , H04J14/0282 , H04J14/0291
Abstract: A communication recovering system for a wavelength division multiplexed passive optical network (WDM PON). The communication recovering system can recover fault of optical fibers between the central office and the remote nodes without additional optical fibers by grouping two remote nodes and employing AWGs having periodic transmission characteristics, and can also simply and rapidly recover such a fault with minimal optical loss using 1xN structure of the AWGs and On-Off optical switches, although protection optical fibers are additionally installed therein. The communication recovering system has advantages in that it can simplify network structure, be cost-effectively implemented, reduce optical loss, and rapidly perform protection of optical fiber fault.
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公开(公告)号：KR1020060054506A
公开(公告)日：2006-05-22
申请号：KR1020040093566
申请日：2004-11-16
Applicant: 한국과학기술원
IPC: H04B10/03 , H04B10/2581
CPC classification number: H04J14/0295 , H04J14/0226 , H04J14/0246 , H04J14/025 , H04J14/0282 , H04J14/0291
Abstract: A communication recovering system for a wavelength division multiplexed passive optical network (WDM PON). The communication recovering system can recover fault of optical fibers between the central office and the remote nodes without additional optical fibers by grouping two remote nodes and employing AWGs having periodic transmission characteristics, and can also simply and rapidly recover such a fault with minimal optical loss using 1xN structure of the AWGs and On-Off optical switches, although protection optical fibers are additionally installed therein. The communication recovering system has advantages in that it can simplify network structure, be cost-effectively implemented, reduce optical loss, and rapidly perform protection of optical fiber fault.
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