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公开(公告)号：KR100496640B1
公开(公告)日：2005-06-20
申请号：KR1020020080826
申请日：2002-12-17
Applicant: 한국전자통신연구원
IPC: H04J14/02
CPC classification number: H04J14/0227 , H04J14/02 , H04J14/0246 , H04J14/0279
Abstract: A channel allocation method of channels having different transmission speeds in a wavelength division multiplexing (WDM) system is provided. The channel allocation method in a multirate optical transmission system includes selecting a channel having the lowest transmission speed from not allotted channels, allotting the selected channel to the longest wavelength band of empty wavelength bands, and determining whether not allotted channels exist in order to repeatedly perform selecting the channel having the lowest transmission speed from the not allotted channels and allotting the selected channel to the longest wavelength band of the empty wavelength bands, until all the channels are allotted.
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62.发明公开
公开(公告)号：KR1020050006614A
公开(公告)日：2005-01-17
申请号：KR1020030046491
申请日：2003-07-09
Applicant: 한국전자통신연구원
IPC: H01S3/00
CPC classification number: H01S3/06758 , H01S3/1301 , H01S3/302 , H01S2301/04
Abstract: PURPOSE: An apparatus and a method for compensating the gain spectrum in response to the temperature change of an optical amplifier and a long-wavelength band dispersion-compensating hybrid optical amplifier provided with the same are provided to easily compensate the change of gain spectrum in response to the temperature change by changing the intensity of the DCF pump. CONSTITUTION: An apparatus for compensating the gain spectrum in response to the temperature change of an optical amplifier includes a dispersion compensating fiber(DCF)(50), at least one pumping units(30-34), a first and a second temperature detection units(60,61) and a controller(70). The DCF is positioned between the first amplifying terminal and the second amplifying terminal to compensate the distribution of the optical signal outputted from the first amplifying terminal. The DCF performs the Raman amplification for the inputted pumping light. The pumping units supply the forward and backward pumping lights to the DCF. The first and the second temperature detection units detect the temperature changes of the detected first and the second amplifying terminals. And, the controller controls the intensity of the pumping light in response to the temperature changes of the detected first and the second amplifying terminals.
Abstract translation: 目的：提供一种用于补偿响应于光放大器的温度变化的增益谱的装置和方法以及具有该放大器的长波长带色散补偿混合光放大器，以便容易地补偿响应中的增益谱的变化 通过改变DCF泵的强度来改变温度。 构成：用于响应于光放大器的温度变化补偿增益谱的装置包括色散补偿光纤（DCF）（50），至少一个泵送单元（30-34），第一和第二温度检测单元 （60,61）和控制器（70）。 DCF位于第一放大端和第二放大端之间，以补偿从第一放大端输出的光信号的分布。 DCF对输入的泵浦光进行拉曼放大。 泵送单元向DCF提供前向和后向泵浦灯。 第一和第二温度检测单元检测检测到的第一和第二放大端子的温度变化。 并且，控制器响应于检测到的第一和第二放大端子的温度变化来控制泵浦光的强度。
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公开(公告)号：KR100462029B1
公开(公告)日：2004-12-18
申请号：KR1020030016113
申请日：2003-03-14
Applicant: 한국전자통신연구원
IPC: G02B6/00
CPC classification number: H04B10/296 , H01S3/06758 , H01S3/0941 , H01S3/10015 , H01S3/10069 , H01S3/1301 , H01S3/1305 , H01S3/1608 , H01S3/2375 , H01S3/302 , H01S2301/04 , H04B2210/003
Abstract: A method for realizing, in a fiber amplifier with three stages of amplifiers (100,200,300), automatic gain control (530) in which a constant gain is obtained when channels are varied, and automatic level control in which a constant output per channel is obtained when a light power is varied because of variations in span loss. A light power (L1) or another light power of a specific wavelength is monitored (520) to determine when variations in these light powers take place, current values of pump laser diodes appropriate for an input is read from a lookup table (540), and pump laser diodes are driven. During this operation, a pump power of the first stage amplifier (100) is constantly maintained, and those of the second or third stage amplifier are controlled (530).
Abstract translation: 一种用于在具有三级放大器（100,200,300）的光纤放大器中实现当在改变通道时获得恒定增益的自动增益控制（530）以及在通道被改变时获得每通道恒定输出的自动电平控制的方法 光功率因跨度损耗的变化而变化。 监视（520）光功率（L1）或特定波长的另一光功率以确定何时发生这些光功率的变化，从查找表（540）读取适合于输入的泵浦激光二极管的电流值， 并驱动泵浦激光二极管。 在此操作期间，第一级放大器（100）的泵功率被恒定地保持，并且第二或第三级放大器的泵功率被控制（530）。 ＆lt;图像＆GT;
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公开(公告)号：KR1020040092759A
公开(公告)日：2004-11-04
申请号：KR1020030027068
申请日：2003-04-29
Applicant: 한국전자통신연구원
IPC: H01S3/10
Abstract: PURPOSE: A long-wavelength erbium-doped fiber amplifier and a method for compensating temperature thereof are provided to obtain a flattened gain spectrum by compensating the gain flatness of optical signals. CONSTITUTION: A first amplifier(100) is used for amplifying inputted optical signals as much as the intensity of first and second gain control signals, converting partially the inputted optical signals and the amplified optical signals to first and second electric signals, and detecting the internal temperature as first temperature data. A temperature compensator(300) is used for controlling the intensity of the amplified optical signals in response to control voltages. A second amplifier(200) is used for amplifying the inputted optical signals as much as the intensity of third and fourth gain control signals, converting partially the inputted optical signals and the amplified optical signals to third and fourth electric signals, and detecting the internal temperature as second temperature data. A controller(400) is used for generating a first to a fourth gain control signal, obtaining the internal temperature of the amplifier, and outputting a control voltage.
Abstract translation: 目的：提供长波长掺铒光纤放大器及其温度补偿方法，通过补偿光信号的增益平坦度来获得平坦的增益谱。 构成：第一放大器（100）用于与第一和第二增益控制信号的强度一样放大输入的光信号，将输入的光信号和放大的光信号部分地转换成第一和第二电信号，并检测内部 温度作为第一温度数据。 温度补偿器（300）用于响应于控制电压来控制放大的光信号的强度。 第二放大器（200）用于放大输入的光信号，与第三和第四增益控制信号的强度一样，将输入的光信号和放大的光信号部分地转换为第三和第四电信号，并检测内部温度 作为第二温度数据。 控制器（400）用于产生第一至第四增益控制信号，获得放大器的内部温度并输出控制电压。
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公开(公告)号：KR1020040081586A
公开(公告)日：2004-09-22
申请号：KR1020030016113
申请日：2003-03-14
Applicant: 한국전자통신연구원
IPC: G02B6/00
CPC classification number: H04B10/296 , H01S3/06758 , H01S3/0941 , H01S3/10015 , H01S3/10069 , H01S3/1301 , H01S3/1305 , H01S3/1608 , H01S3/2375 , H01S3/302 , H01S2301/04 , H04B2210/003
Abstract: PURPOSE: An optical fiber amplifier and a fabricating method thereof are provided to form constantly each output of channels regardless of channel number and input power by using a simplified circuit. CONSTITUTION: A first stage amplifier(100) includes a first optical fiber and a first pump laser diode, and it amplifies an input optical signal. A second stage amplifier(200) includes a second optical fiber and a second pump laser diode, and, it receives the output of the first stage amplifier and generate a Raman gain. A third stage amplifier(300) includes a third optical fiber and a third pump laser diode, and it amplifies an output signal of the second stage amplifier by a predetermined gain. An automatic gain controller(500) is used for obtaining the predetermined gain by controlling the pump power of the second and the third pump laser diodes after fixing the pump beam of the first pump laser diode.
Abstract translation: 目的：提供一种光纤放大器及其制造方法，通过使用简化的电路，不管通道数量和输入功率如何，不断地形成每个通道的输出。 构成：第一级放大器（100）包括第一光纤和第一泵浦激光二极管，并且其放大输入光信号。 第二级放大器（200）包括第二光纤和第二泵激光二极管，并且其接收第一级放大器的输出并产生拉曼增益。 第三级放大器（300）包括第三光纤和第三泵激光二极管，并且以预定的增益放大第二级放大器的输出信号。 通过在固定第一泵浦激光二极管的泵浦光束之后控制第二和第三泵浦激光二极管的泵浦功率，使用自动增益控制器（500）来获得预定的增益。
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Patent Agency Ranking
公开(公告)号：KR100319745B1
公开(公告)日：2002-02-19
申请号：KR1019980049112
申请日：1998-11-16
IPC: G02B6/02
Abstract: 1. 청구범위에 기재된 발명이 속하는 기술분야
본 발명은 광전송 시스템에서 광증폭기의 광학적 특성항목 측정 장치 및 그 방법에 관한 것임.
2. 발명이 해결하고자하는 과제
본 발명은 광증폭기를 이용하여 중계하는 광전송 시스템에서 실제 운용중인 광증폭기의 광학적 신호대잡음비 및 잡음지수를 측정함에 있어, 광신호의 파장영역에서 광신호와 광신호의 증폭 과정에서 필연적으로 증폭된 자연방출광을 효율적으로 분리하여 측정함으로서, 광증폭기의 구조에 무관하게 실제 시스템의 운용 상태에서 광증폭기의 성능을 정확하게 측정하고 감시할 수 있으며, 또한 다채널 광전송 시스템에도 용이하게 적용할 수 있는 광증폭기의 광학적 특성항목 측정 장치 및 그 방법을 제공함에 목적이 있다.
3. 발명의 해결방법의 요지
본 발명은, 자연방출광신호 성분을 갖는 입력 광신호를 전송을 위하여 증폭하기 위한 광증폭수단; 상기 자연방출광신호 성분과 상기 광증폭수단에 의해 발생된 자연방출광신호 성분을 갖는 상기 광증폭수단의 출력 광신호를, 광신호와 자연방출광신호로 분리하여, 상기 자연방출광신호의 세기와 상기 광증폭수단의 출력 광신호의 세기를 검출하기 위한 신호세기 검출수단; 및 상기 신호세기 검출수단에 의해 검출된 광신호의 세기와 자연방출광신호의 세기를 이용하여 신호대잡음비를 계산하기 위한 신호대잡음비 계산수단을 포함한다.
4. 발명의 중요한 용도
본 발명은 광증폭기를 이용하여 중계하는 광전송 시스템 등에 이용됨.-
公开(公告)号：KR100315421B1
公开(公告)日：2001-11-26
申请号：KR1019990059758
申请日：1999-12-21
Applicant: 한국전자통신연구원
IPC: G02B6/00
Abstract: 본발명은넓은영역의파장을조절할수 있으며손실이적고파장및 파장간격을용이하게가변시킬수 있는두파장광필터및 그를이용한레이저에관한것으로, 특정파장의빛을반사하는광학필터와임의의파장을투과시키는광학필터로이루어져파장간격이가변되는두 파장광섬유광학필터및 이를이용하여서로다른두개의파장을발진시키는동시에두개의발진파장간격을조절할수 있는두 파장레이저를제공한다. 본발명에따른광학필터는파장이고정되었거나또는좁은범위에서파장을가변시킬수 있는 FBG 필터와넓은범위에걸쳐투과파장을가변시킬수 있는필터및 파장의존성이없는반사수단으로이루어지며가변광 감쇄기를통해두 파장의상대적인세기를조절할수 있다. 또한, 이러한광섬유광학필터를레이저공진기에적용하여두개의파장에서출력을냄과동시에파장간격이가변되는레이저를구현할수 있다.
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公开(公告)号：KR1020000032607A
公开(公告)日：2000-06-15
申请号：KR1019980049112
申请日：1998-11-16
IPC: G02B6/02
Abstract: PURPOSE: A device for measuring optical property items of an optical amplifier in an optical transmission system, and a method therefor are provided to exactly evaluate the performance of the optical amplifier in the system operation state, regardless of its structure, by individually measuring an optical signal and amplified spontaneous emission (ASE) during an amplification process of the optical signal, in a wavelength region of the optical signal. CONSTITUTION: A device for measuring optical property items of an optical amplifier in an optical transmission system comprises an optical amplification unit(410) for amplifying an inputted optical signal; a signal strength meter(420) for dividing the inputted optical signal amplified by the optical amplification unit(410) and an ASE signal generated from the optical amplification unit(410), and detecting strength of each signal; and a unit(430) for calculating an optical signal-to-noise ratio (OSNR) by using the strength of the optical signal and the ASE signal. The device is used for the optical transmission system using the optical amplifier.
Abstract translation: 目的：一种用于测量光传输系统中的光放大器的光学性质的装置及其方法，其方法是通过分别测量光学系统的光学特性来精确评估光放大器在系统运行状态下的性能，而不管其结构如何 在光信号的波长区域中在光信号的放大处理期间信号和放大的自发发射（ASE）。 构成：用于测量光传输系统中的光放大器的光学属性项的装置，包括用于放大所输入的光信号的光放大单元（410） 用于分割由光放大单元（410）放大的输入光信号的信号强度计（420）和从光放大单元（410）产生的ASE信号，并检测各信号的强度; 以及通过使用光信号和ASE信号的强度来计算光信噪比（OSNR）的单元（430）。 该装置用于使用光放大器的光传输系统。
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公开(公告)号：KR1019970008302B1
公开(公告)日：1997-05-22
申请号：KR1019940033165
申请日：1994-12-07
Abstract: Optical signal add/drop apparatus optically embodies an add/drop function, removes the necessity of a light-to-electricity or electricity-to-light conversion, and simplifies a system construction. The apparatus includes: a optical circulator(10) for circulating a signal only toward an I/O terminal adjacent to one direction; a first optical filter(21) which is connected to one terminal(B) of the circulator(10), permeates an optical signal of a predetermined wavelength band, and reflexes the remaining signals; and a second optical filter(22) which is connected to th other terminal(C) of the circulator(10), permeates an optical signal of a predetermined wavelength band, and reflexes the remaining signals.
Abstract translation: 光学信号分插装置以光学方式体现了加/减功能，消除了光对电或电 - 光转换的必要性，并且简化了系统构造。 该装置包括：用于使信号仅向与一个方向相邻的I / O端子循环的光循环器（10）; 连接到所述循环器（10）的一个端子（B）的第一滤光器（21）渗透预定波长带的光信号，并反射剩余的信号; 和与循环器（10）的其他端子（C）连接的第二滤光器（22）透过预定波长带的光信号，反射剩余的信号。
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