-
公开(公告)号：KR1020010019027A
公开(公告)日：2001-03-15
申请号：KR1019990035226
申请日：1999-08-24
Applicant: 한국과학기술원
IPC: H04J14/02
CPC classification number: H04J14/0221 , H04B10/07955 , H04B10/07957
Abstract: PURPOSE: A device for chasing wavelength of a passive type optical subscribers' net of a wavelength dividing multiplex system divided in spectrum is provided to make the wavelength of WGR, which is located in the central station, in accord with the wavelength of WGR, which is located in the local station and which changes according to the temperature by using the optical output of upper channels. CONSTITUTION: A device for chasing wavelength of a passive type optical subscribers' net of a wavelength dividing multiplex system divided in spectrum includes a reference voltage generating instrument, an observation voltage generating instrument, a comparing instrument and a control circuit(112). The reference voltage generating instrument includes optical couplers(104, 105, 106) detecting a part of the upward signal and an optical detector(111) converting the optical signal detected by the optical couplers into the voltage and supplying it to the comparing instrument as the reference voltage. The observation voltage generating instrument includes optical couplers(206, 207) detecting a part of the reverse multiplexed upward channel and optical detectors(115, 116) converting the optical signal detected by the optical couplers into the voltage and supplying it to the comparing instrument as the observation voltage. The comparing instrument is a differential amplifier(113) amplifying the difference voltage of the reference voltage and the observation voltage. The control circuit(112) controls the temperature of a reverse multiplexed portion(101)
Abstract translation: 目的：提供一种用于追踪频谱分割的波分复用系统的被动式光用户网的波长的设备，以使位于中心站的WGR的波长与WGR的波长一致， 位于本地站，并通过使用上通道的光输出根据温度而变化。 构成：用于追踪频谱分割的波分复用系统的被动式光用户网的波长的装置包括参考电压产生装置，观测电压产生装置，比较装置和控制电路（112）。 参考电压产生装置包括检测上升信号的一部分的光耦合器（104,105,106）和将由光耦合器检测到的光信号转换成电压并将其提供给比较器的光检测器（111），作为 参考电压。 观察电压产生装置包括检测反向多路复用上行信道的一部分的光耦合器（206,207）和光检测器（115,116），将由光耦合器检测到的光信号转换成电压并将其提供给比较仪器作为 观测电压。 比较器是放大参考电压和观测电压的差分电压的差分放大器（113）。 控制电路（112）控制反向复用部分（101）的温度，
-
公开(公告)号：KR1020000060249A
公开(公告)日：2000-10-16
申请号：KR1019990008384
申请日：1999-03-12
Applicant: 한국과학기술원
IPC: H04B10/07 , H04B10/2581
CPC classification number: H04J14/02 , H04B10/0775 , H04B2210/075
Abstract: PURPOSE: An apparatus for checking a frequency using optical filters having different transmission characteristics is provided to use an optical fiber and a pilot tone which is used for checking the existence and the size of an optical signal in an optical transmission system based upon multi wave division method in order to manage and maintain the system efficiently. CONSTITUTION: A first shaping coupler(111) extracts an optical signal from an externally inputted optical signal. A second shaping coupler(112) equally divides the signal inputted from the first shaping coupler(111). A first and a second optical filters(113,114) filter different bandwidth transmission filtering with respect to a signal inputted from the second shaping coupler(112). A first and a second optical detectors(115,116) measure the intensity of the optical signal from an analog signal transmitted through the first and the second optical filters(113,114). An analog/digital converter(117) converts the analog signals outputted from the first and the second optical detectors(115,116) into digital signals.
Abstract translation: 目的：提供一种用于使用具有不同传输特性的滤光器来检查频率的装置，以使用光纤和导频音，其用于基于多波分割来检查光传输系统中的光信号的存在和尺寸 方法，以便有效地管理和维护系统。 构成：第一成形耦合器（111）从外部输入的光信号中提取光信号。 第二成形耦合器（112）等分地分割从第一成形耦合器（111）输入的信号。 第一和第二滤光器（113,114）相对于从第二成形耦合器（112）输入的信号滤波不同的带宽传输滤波。 第一和第二光学检测器（115,116）从通过第一和第二滤光器（113,114）传输的模拟信号测量光信号的强度。 模拟/数字转换器（117）将从第一和第二光学检测器（115,116）输出的模拟信号转换成数字信号。
-
公开(公告)号：KR1020000025307A
公开(公告)日：2000-05-06
申请号：KR1019980042332
申请日：1998-10-09
Applicant: 한국과학기술원
IPC: H04B17/00
CPC classification number: H04J14/0276 , H04B10/07955 , H04B10/07957
Abstract: PURPOSE: An apparatus for inspecting an optical signal wavelength and an optical electric power, method for inspecting and a material for recording the same are provided to watch a mean optical electric power as measure the size of a modulated optical signal and an optical signal wavelength as measure the size and the phase of a modulated signal. CONSTITUTION: An apparatus for inspecting an optical signal wavelength and an optical electric power includes a first part(203) for receiving light, a band pass filter, a second part(207) for receiving light, an analog/digital transformation part(204, 208), and a part(205) for watching a wavelength and an optical electric power. The first part for receiving light is to receive an optical signal modulated by a pilot tone generation current and transform into an electric signal. The band pass filter is to receive an optical signal transformed by the pilot tone generation current and perform a band pass filtering. The second part for receiving light is to receive the filtered optical signal from the band pass filter and transform into an electrical signal, The analog/digital transformation part is to receive an analog signal from the first and second parts for receiving light, and transform into a digital signal. The part for watching a wavelength and an optical electric power is to receive the digital signal from the first and second parts for receiving light, perform a frequency transformation, and watch the wavelength and the optical electrical power.
Abstract translation: 目的：提供一种用于检查光信号波长和光电功率的装置，用于检查的方法及其记录材料，用于观察平均光功率，作为测量调制光信号和光信号波长的尺寸，如 测量调制信号的大小和相位。 构成：用于检查光信号波长和光功率的装置包括用于接收光的第一部分（203），带通滤波器，用于接收光的第二部分（207），模拟/数字变换部分（204， 208）和用于观察波长和光电功率的部分（205）。 用于接收光的第一部分是接收由导频音产生电流调制的光信号并转换成电信号。 带通滤波器是接收由导频音产生电流变换的光信号，并进行带通滤波。 用于接收光的第二部分是从带通滤波器接收滤波后的光信号并转换成电信号。模拟/数字变换部分从第一和第二部分接收模拟信号以接收光，并转换成 数字信号。 用于观看波长和光功率的部分是从第一和第二部分接收数字信号以接收光，执行频率变换，并观察波长和光电功率。
-
Patent Agency Ranking
公开(公告)号：KR1020020019855A
公开(公告)日：2002-03-13
申请号：KR1020000053216
申请日：2000-09-07
Applicant: 한국과학기술원
IPC: H04B10/572 , H04B10/294 , H04B10/2581
CPC classification number: H04B10/506 , H01S5/0687 , H01S5/4087 , H04B10/572 , H04J14/02
Abstract: PURPOSE: An apparatus and a method for stabilizing multiwavelength for a wavelength division multiplexing optical communication system are provided to simultaneously stabilize lots of WDM channels through one control loop, and efficiently restrain frequency offset by using an FFT, thereby accurately and simultaneously stabilizing frequency of each laser. CONSTITUTION: A modulating element modulates output wavelength of transmitting lasers(22a,22b,...,22n) different from each other in wavelength. An optical distribution element(26a) distributes optical signals into two parts to stabilize wavelength of wavelength division multiplexed optical signals. An optical detection element(14a) detects one part of the distributed optical signals. An optical filtering element(24) filters wavelength division multiplexed optical signals in an optical frequency area. An optical detection element(14b) detects the other part of the distributed optical signals after passing through the optical filtering elements(14a,14b) to stabilize wavelength of the wavelength division multiplexed optical signals at each reference frequency. Calculation elements(16,20) calculate the detected optical signals for detecting the first differential signal of the optical filtering elements(14a,14b). An output element(18) performs predetermined output from the detected first differential signal to control the transmitting lasers(22a,22b,...,22n).
Abstract translation: 目的：提供一种用于波分复用光通信系统稳定多波长的装置和方法，以通过一个控制环同时稳定大量的WDM信道，并通过使用FFT有效地抑制频偏，从而精确并同时稳定每个 激光。 构成：调制元件调制波长不同的发射激光器（22a，22b，...，22n）的输出波长。 光分配元件（26a）将光信号分为两部分，以稳定波分复用光信号的波长。 光检测元件（14a）检测分布式光信号的一部分。 光滤波元件（24）对光频区域中的波分复用光信号进行滤波。 光检测元件（14b）在通过光学滤波元件（14a，14b）之后检测分布式光信号的另一部分，以稳定每个参考频率处的波分复用光信号的波长。 计算元件（16,20）计算用于检测光学滤波元件（14a，14b）的第一差分信号的检测光信号。 输出元件（18）从检测到的第一差分信号执行预定的输出，以控制发送激光器（22a，22b，...，22n）。
-
公开(公告)号：KR100292808B1
公开(公告)日：2001-06-15
申请号：KR1019990008384
申请日：1999-03-12
Applicant: 한국과학기술원
IPC: H04B10/07 , H04B10/2581
CPC classification number: H04J14/02 , H04B10/0775 , H04B2210/075
Abstract: 본발명은, 파장분할다중광전송시스템에서의필터를이용한주파수감시장치에관한것으로, 특히파장분할다중광전송시스템에서시스템의유지및 관리를효율적으로하기위하여투과특성이서로다른광학필터와각 광신호에인가한서로다른주파수의파일롯톤 신호를이용한주파수감시장치를제공하는데그 목적이있다. 본발명에따르면, 외부로부터입력되는파일럿톤 신호를포함하고있는광신호를분배하기위한광 분배수단; 상기광 분배수단에의해분배된광신호의일정한주파수영역만을통과시키기위한서로투과특성이다른다수의광학필터링수단; 상기광학필터링수단의출력을전기적신호로변환시키기위한광 검출수단; 상기광 검출수단의출력으로부터파일럿톤의세기를감지하여광신호의주파수를측정하기위한광주파수추출수단을포함하여이루어진주파수감시장치가제공된다.
-
公开(公告)号：KR100271206B1
公开(公告)日：2000-11-01
申请号：KR1019980016017
申请日：1998-05-04
Applicant: 한국과학기술원
IPC: H04B10/07 , H04B10/2581
Abstract: PURPOSE: A device for monitoring a frequency and an optical output using a temperature-controlling etalon filter in a WDM(Wavelength Division Multiplexing) optical transmission system is provided to use a solid etalon filter capable of controlling a temperature in the WDM optical transmission system, to monitor a frequency and an optical output of each channel. CONSTITUTION: An optical distributor distributes multiplexed input optical signals. A solid etalon filter having resonant frequencies receives the distributed optical signals, to pass only a predetermined frequency range according to a temperature. A thermistor is fixed on the etalon filter to measure a temperature of the etalon filter). A thermoelectric cooler is coupled to the filter to cool the filter. A temperature controller controls the currents of the thermoelectric cooler, to control a temperature of the filter. An optical output measurer measures the strength of the optical signals passing the etalon filter, to calculate the frequency and optical output of the optical signals. And the resonant frequencies of the etalon filter controls the temperature of the etalon filter through the temperature controller.
Abstract translation: 目的：提供一种在WDM（波分复用）光传输系统中使用温度控制标准具滤波器监测频率和光输出的装置，以使用能够控制WDM光传输系统中的温度的固体标准具滤波器， 以监视每个通道的频率和光输出。 构成：光分配器分配复用的输入光信号。 具有谐振频率的固体标准具滤波器接收分布式光信号，仅根据温度通过预定的频率范围。 热敏电阻固定在标准具过滤器上，以测量标准具过滤器的温度）。 热电冷却器耦合到过滤器以冷却过滤器。 温度控制器控制热电冷却器的电流，以控制过滤器的温度。 光输出测量器测量通过标准具滤波器的光信号的强度，以计算光信号的频率和光输出。 并且标准具滤波器的谐振频率通过温度控制器控制标准具滤波器的温度。
-
公开(公告)号：KR100217427B1
公开(公告)日：1999-09-01
申请号：KR1019970017558
申请日：1997-05-07
IPC: H04B10/2581
Abstract: 가. 청구범위에 기재된 발명이 속한 기술분야 : 파장분할다중(WDM) 광전송 시스템에 관한 것이다.
나. 발명이 해결하려고 하는 기술적 과제 : 전송 레이저들이 자동적으로 표준주파수에서 안정된 광 출력을 발생할 수 있도록 하는 콜드 스타트 방식 파장분할다중(WDM) 광전송 시스템 및 그 표준주파수를 발생시키기 위한 방법을 구현한다.
다. 발명의 해결방법의 요지 : 본 발명은 분포 궤환형(DFB) 레이저와 수동형 광신호 역다중화기를 사용하는 파장분할다중(WDM) 광전송 시스템을 제안한다. 상기 DFB 레이저들은 정상적인 동작조건에서 파장을 측정하여 각 채널별로 표준 주파수로부터 양쪽으로 채널 간격의 절반 이내에서 동작하는 레이저들을 선별한다. 상기 WDM 광전송 시스템은 이렇게 선별된 레이저들이 표준 주파수에서 동작하는 데에 필요한 동작조건을 미리 입력시키지 않더라도 시스템의 스위치만 켜면 자동적으로 표준 주파수에서 동작하는 것은 물론 각 레이저들이 원하는 만큼의 광 출력을 발생하도록 조정되는 것을 특징으로 한다.
라. 발명의 중요한 용도 : 파장분할다중 광전송 시스템.-
公开(公告)号：KR1019980082571A
公开(公告)日：1998-12-05
申请号：KR1019970017558
申请日：1997-05-07
IPC: H04B10/2581
Abstract: 가. 청구범위에 기재된 발명이 속한 기술분야: 파장분할다중(WDM) 광전송시스템에 관한 것이다.
나. 발명이 해결하려고 하는 기술적 과제: 전송 레이저들이 자동적으로 표준주파수에서 안정된 광 출력을 발생할 수 있도록 하는 콜트스타트방식 WDM 광전송시스템 및 그 표준주파수를 발생시키기 위한 방법을 구현한다.
다. 발명의 해결방법의 요지: 본 발명은 분포궤환형(DFB) 레이저와 수동형 광신호 역다중화기를 사용하는 파장분할다중(WDM) 광전송시스템을 제안한다. 상기 DFB 레이저들은 정상적인 동작조건에서 파장을 측정하여 각 채널별로 표준 주파수로부터 채널 간격의 절반 이내에서 동작하는 레이저들을 선별한다. 상기 WDM 광전송 시스템은 이렇게 선별된 레이저들이 표준 주파수에서 동작하는 데에 필요한 동작조건을 미리 입력시키지 않더라도 시스템의 스위치만 켜면 자동적으로 표준 주파수에서 동작하는 것은 물론 각 레이저들이 원하는 만큼의 광 출력을 발생하도록 조정하는 것을 특징으로 한다.
라. 발명의 중요한 용도: 파장분할다중 광전송시스템.
-
-
-
-
-
-
-
Search Results
18
records
(took 0.019 seconds)
