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1. 发明授权

US06292291B1 Optical fiber amplifier having constant output power for each channel and amplifying method thereof 失效
标题翻译：每个通道具有恒定输出功率的光纤放大器及其放大方法
公开(公告)号：US06292291B1
公开(公告)日：2001-09-18
申请号：US09448870
申请日：1999-11-24
申请人： Soo-young Yoon , Rae-sung Jung , Seong-taek Hwang , Sung-jun Kim
发明人： Soo-young Yoon , Rae-sung Jung , Seong-taek Hwang , Sung-jun Kim
IPC分类号： H01S300
CPC分类号： H04B10/2931 , H01S3/10015 , H01S3/1301 , H04B10/077 , H04B10/07955
摘要： An optical fiber amplifier having constant output power for each channel including a first measuring unit for dividing an input light signal into a first light signal and a second light signal, sub-dividing the first light signal into a plurality of light signals and converting the plurality of light signals into electrical signals to output the electrical signals, an optical fiber amplifying unit for amplifying the second light signal according to a predetermined amplification control value, a second measuring unit for converting a light signal of a predetermined wavelength band, output from the optical fiber amplifying unit, into an electrical signal, and an output power controller for controlling the predetermined amplification control value according to a plurality of output values of the first measuring unit and an output value of the second measuring unit, so that the power level of the optical fiber amplifying unit is maintained at a constant level.
摘要翻译： 1.一种光纤放大器，对于每个通道具有恒定的输出功率，包括用于将输入光信号分割为第一光信号的第一测量单元和第二光信号，将第一光信号分为多个光信号，并将多个光信号的光信号输出到电信号中以输出电信号;光纤放大单元，用于根据预定的放大控制值放大第二光信号;第二测量单元，用于转换从光学信号输出的预定波长带的光信号光纤放大单元和电信号;以及输出功率控制器，用于根据第一测量单元的多个输出值和第二测量单元的输出值来控制预定的放大控制值，使得功率电平光纤放大单元保持恒定。

2. 发明授权

US06570701B1 Long-band light source for testing optical elements using feedback loop 失效
标题翻译：用于使用反馈回路测试光学元件的长带光源
公开(公告)号：US06570701B1
公开(公告)日：2003-05-27
申请号：US09624245
申请日：2000-07-24
申请人： Seong-Tank Hwang , Soo-Young Yoon , Rae-Sung Jung , Jeong-Moo Kim , Sung-Jun Kim
发明人： Seong-Tank Hwang , Soo-Young Yoon , Rae-Sung Jung , Jeong-Moo Kim , Sung-Jun Kim
IPC分类号： H04B1012
CPC分类号： H04B10/2537
摘要： A long-band (L-band) light source capable of testing the characteristics of optical elements using a feedback loop in a fiber amplifier of an optical communication system. In the fiber amplifier including (a) a rare earth doped fiber as an amplification medium, (b) forward and backward pump laser diodes, positioned on front and rear ends of the rare earth doped fiber, for generating and providing pumping lights to the rare earth doped fiber, (c) first wavelength selective couplers for providing the pumping lights from the forward and backward pump laser diodes to the rare earth doped fiber, and (d) optical isolators, inserted between front and rear ends of the first wavelength selective couplers, respectively, for intercepting backward lights reflected from input and output terminals of the fiber amplifier, the L-band light source comprises a feedback loop for making a seed beam incident to the rare earth doped fiber or making an amplified spontaneous emission (ASE) incident again to the rare earth doped fiber to reuse the seed beam or the ASE as the L-band light source for testing the optical elements, second wavelength selective couplers, provided between the optical isolators and the first wavelength selective couplers, respectively, for making the seed beam incident to the feedback loop or extracting and providing the ASE to the feedback loop, and a forward optical isolator, connected to the feedback loop, for intercepting a backward propagation of the seed beam or the ASE. The L-band light source can accurately test the characteristics of various kinds of optical elements used for optical communications.
摘要翻译：一种能够在光通信系统的光纤放大器中使用反馈回路来测试光学元件的特性的长带（L波段）光源。在包括（a）稀土掺杂光纤作为放大介质的光纤放大器中，（b）位于稀土掺杂光纤的前端和后端的前向和后向泵激光二极管，用于产生和提供泵浦光到罕见的（c）第一波长选择耦合器，用于将来自前向和后向泵浦激光二极管的泵浦光提供到稀土掺杂光纤;以及（d）插入在第一波长选择耦合器的前端和后端之间的光隔离器分别用于截取从光纤放大器的输入和输出端子反射的向后光，L波段光源包括用于使种子光束入射到稀土掺杂光纤或进行放大的自发发射（ASE）事件的反馈回路再次将稀土掺杂的光纤重新使用种子束或ASE作为L波段光源进行光学元件的测试，第二波长选择耦合器提供betw 分别使光隔离器和第一波长选择耦合器用于使种子射束入射到反馈回路，或者将ASE提供给反馈回路，以及连接到反馈回路的正向光隔离器，用于截取后向种子束或ASE的传播。 L波段光源可以准确地测试用于光通信的各种光学元件的特性。

3. 发明授权

US06470113B1 Broadband light source using seed-beam 失效
标题翻译：宽带光源采用种子束
公开(公告)号：US06470113B1
公开(公告)日：2002-10-22
申请号：US09612437
申请日：2000-07-07
申请人： Seong-Teak Hwang , Soo-Young Yoon , Rae-Sung Jung , Jeong-Mee Kim , Sung-Jun Kim
发明人： Seong-Teak Hwang , Soo-Young Yoon , Rae-Sung Jung , Jeong-Mee Kim , Sung-Jun Kim
IPC分类号： G02B666
CPC分类号： H01S3/06795 , H01S3/06754
摘要： Disclosed is a broadband light source for measurement using a seed-beam which can reduce the strength difference between the output lights per wavelength by heightening the strength of the output light corresponding to the L-band of the light source, and thus reduce the measurement error per wavelength. The broadband light source includes a seed-beam light source for outputting a seed-beam of a predetermined band of wavelength, a first optical coupler for combining the seed-beam and a pumping light and making a combined light incident to a front of a rare earth ion-doped optical fiber, a first pumping light source for providing the pumping light to the first optical coupler, a second optical coupler for making the input pumping light incident to a rear of the rare earth ion-doped optical fiber, a second pumping light source for providing the pumping light to the second optical coupler, and an output terminal for radiating the light outputted through the rear of the rare earth ion-doped optical fiber.
摘要翻译：公开了一种用于使用种子束进行测量的宽带光源，其可以通过提高对应于光源的L波段的输出光的强度来降低每波长的输出光之间的强度差，并且因此降低测量误差每个波长。宽带光源包括用于输出预定波段波段的种子束的种子束光源，用于组合种子束和泵浦光的第一光耦合器，并将入射到罕见的前面的组合光地球离子掺杂光纤，用于向第一光耦合器提供泵浦光的第一泵浦光源，用于使输入泵浦光入射到稀土离子掺杂光纤的后部的第二光耦合器，第二泵浦用于向第二光耦合器提供泵浦光的光源和用于照射通过稀土离子掺杂光纤的后部输出的光的输出端子。

4. 发明授权

US06353496B1 Wavelength division multiplexing erbium doped fiber amplifier which outputs constant power per channel and amplifying method thereof 失效
标题翻译：波分复用掺铒光纤放大器，每通道输出恒功率及其放大方法
公开(公告)号：US06353496B1
公开(公告)日：2002-03-05
申请号：US09413798
申请日：1999-10-07
申请人： Rae-sung Jung , Seong-taek Hwang , Jeong-mee Kim
发明人： Rae-sung Jung , Seong-taek Hwang , Jeong-mee Kim
IPC分类号： H01S300
CPC分类号： H04B10/296 , H01S3/067 , H01S3/1312
摘要： A wavelength division multiplexing erbium doped fiber amplifier (WDM-EDFA) which outputs constant power per channel, and an amplification method thereof, are provided. The WDM-EDFA for amplifying received signal light of a plurality of channels which are multiplexed, includes a power control unit for generating dummy light whose output power is controlled according to a first control value, and controlling the power of received signal light by coupling the dummy light to the received signal light, an optical fiber amplification unit for amplifying signal light power-controlled by the power control unit, using pumping light generated according to a second control value, and a controller for supplying the first control value to the power control unit to obtain dummy light power corresponding to the difference between the power value of the received signal light and a predetermined target power value, and supplying the second control value to the optical fiber amplification unit to obtain pumping light power required to amplify the received signal light. Thus, a transient effect of the WDM-EDFAs, in which a plurality of channels are multiplexed and amplified, can be eliminated by controlling the power of incident signal light of added/dropped channels.
摘要翻译：提供了输出每通道恒定功率的波分复用掺铒光纤放大器（WDM-EDFA）及其放大方法。用于放大被多路复用的多个信道的接收信号光的WDM-EDFA包括：功率控制单元，用于产生根据第一控制值来控制其输出功率的虚拟光，并通过耦合接收信号光来控制接收信号光的功率对接收到的信号光进行伪光;光纤放大单元，用于使用根据第二控制值产生的泵浦光放大由功率控制单元进行功率控制的信号光;以及控制器，用于将第一控制值提供给功率控制单元，以获得与接收信号光的功率值和预定目标功率值之间的差异相对应的虚拟光功率，并将第二控制值提供给光纤放大单元，以获得放大接收信号光所需的泵浦光功率。因此，可以通过控制添加/丢弃的信道的入射信号光的功率来消除多路复用和放大的WDM-EDFA的瞬态效应。

5. 发明授权

US06437907B1 Wide-band optical fiber amplifier and amplifying method thereof 有权
标题翻译：宽带光纤放大器及其放大方法
公开(公告)号：US06437907B1
公开(公告)日：2002-08-20
申请号：US09610321
申请日：2000-07-05
申请人： Soo-Young Yoon , Seong-Teak Hwang , Rae-Sung Jung , Jeong-Mee Kim , Sung-Jun Kim
发明人： Soo-Young Yoon , Seong-Teak Hwang , Rae-Sung Jung , Jeong-Mee Kim , Sung-Jun Kim
IPC分类号： H04B1012
CPC分类号： H04B10/294
摘要： A method and apparatus for amplifying the optical signals of a C-band (1550 nm wavelength band) and a L-band (1580 nm wavelength band) in a wide-band optical fiber amplifier, wherein the incoming optical signals are separated into the 1550 nm wavelength band and the 1580 nm wavelength band by a WVDM optical coupler and respectively amplified by a C-band EDFA and a L-band EDFA A backward ASE generated by the C-band EDFA is fed back to the L-band EDFA by a circulator as a supplementary pumping light to the amplification of the optical signals of the 1580 nm wavelength band.
摘要翻译：一种用于放大宽带光纤放大器中的C波段（1550nm波长带）和L波段（1580nm波长带）的光信号的方法和装置，其中输入光信号被分离成1550 nm波长带和1580nm波长带，并由C波段EDFA和L波段EDFA A分别放大，由C波段EDFA产生的反向ASE由A波段EDFA反馈回L波段EDFA 循环器作为辅助泵浦光，以放大1580nm波长带的光信号。

6. 发明授权

US06404540B1 L-band optical fiber amplifier using seed beam 有权
标题翻译： L波段光纤放大器采用种子束
公开(公告)号：US06404540B1
公开(公告)日：2002-06-11
申请号：US09597779
申请日：2000-06-20
申请人： Seong-Teak Hwang , Soo-Young Yoon , Rae-Sung Jung , Jeong-Mee Kim , Sung-Jun Kim
发明人： Seong-Teak Hwang , Soo-Young Yoon , Rae-Sung Jung , Jeong-Mee Kim , Sung-Jun Kim
IPC分类号： H01S300
CPC分类号： H04B10/294 , H01S3/06754 , H01S3/1608 , H01S2301/04
摘要： A L-band(long-band) optical fiber amplifier is provided. The L-band optical fiber amplifier includes an optical fiber doped with a rare-earth element, at least one pumping light source for emitting pumping light to the optical fiber, a seed beam source for emitting a seed beam at a predetermined wavelength band, and a seed beam coupler disposed between an input terminal and the optical fiber, for coupling an input optical signal with the seed beam and feeding the coupled light forward to the optical fiber. By use of the seed beam, the L-band optical fiber amplifier improves gain flatness characteristics at wavelengths of an optical signal and increases amplification efficiency when the length of the optical fiber and the intensities of the optical signal and the pumping light are changed.
摘要翻译：提供了一个L波段（长波段）光纤放大器。 L波段光纤放大器包括掺杂有稀土元素的光纤，用于向光纤发射泵浦光的至少一个泵浦光源，用于发射预定波长带的种子束的种束源，以及种子光束耦合器，设置在输入端和光纤之间，用于将输入光信号与种子光耦合并将耦合的光向前馈送到光纤。通过使用种子束，L波段光纤放大器提高光信号的波长处的增益平坦度特性，并且当光纤的长度和光信号和泵浦光的强度改变时，增加放大效率。

7. 发明授权

US06392788B1 Optical fiber amplifier 有权
标题翻译：光纤放大器
公开(公告)号：US06392788B1
公开(公告)日：2002-05-21
申请号：US09196765
申请日：1998-11-20
申请人： Soo-young Yoon , Seong-taek Hwang , Lars Johan Albinsson Nilsson , Jeong-mee Kim , Sung-jun Kim , Rae-sung Jung
发明人： Soo-young Yoon , Seong-taek Hwang , Lars Johan Albinsson Nilsson , Jeong-mee Kim , Sung-jun Kim , Rae-sung Jung
IPC分类号： H01S300
CPC分类号： H04B10/2912 , H01S3/06758 , H01S3/06787 , H01S3/1608 , H01S3/1691 , H01S3/1693 , H01S2301/04 , H04B10/291 , H04B10/294
摘要： An optical fiber amplifier including a first optical fiber doped with erbium and phosphorous, for amplifying signal light excited by the erbium, a second optical fiber connected to one end of the first optical fiber, doped with erbium and aluminum, and having a gain spectrum slope opposite to the first optical fiber according to population inversion of the erbium, for amplifying signal light output by the first optical fiber, a pumping laser source connected to another end of the first optical fiber, for exciting the erbium of the first and second optical fibers, and a light coupler for coupling pumping light from the pumping laser source to the signal light and outputting the resultant light to the first optical fiber. Two types of EDFs (erbium doped fibers) having different gain spectrums are used, such that the gain spectrum of each of the EDFs actively varies with the input signal light power or pumping light power. Thus, an entirely flat gain is kept.
摘要翻译：一种光纤放大器，包括掺杂有铒和磷的第一光纤，用于放大由铒激发的信号光;第二光纤，连接到第一光纤的一端，掺杂有铒和铝，并具有增益谱斜率与第一光纤相对的根据铒的群体反转，用于放大由第一光纤输出的信号光，连接到第一光纤的另一端的激光源，用于激发第一和第二光纤的铒以及用于将来自所述泵浦激光源的泵浦光耦合到所述信号光并将所得光输出到所述第一光纤的光耦合器。使用具有不同增益光谱的两种类型的EDF（掺铒光纤），使得每个EDF的增益谱随输入信号光功率或泵浦光功率而变化。因此，保持完全平坦的增益。

8. 发明授权

US06501594B1 Long-band fiber amplifier using feedback loop 失效
标题翻译：长波段光纤放大器采用反馈回路
公开(公告)号：US06501594B1
公开(公告)日：2002-12-31
申请号：US09624135
申请日：2000-07-21
申请人： Seong-Teak Hwang , Soo-Young Yoon , Rae-Sung Jung , Jeong-Mee Kim , Sung-Jun Kim
发明人： Seong-Teak Hwang , Soo-Young Yoon , Rae-Sung Jung , Jeong-Mee Kim , Sung-Jun Kim
IPC分类号： H04B1017
CPC分类号： H04B10/296 , H01S3/06754 , H01S3/0677 , H01S3/094011 , H01S3/094023 , H01S3/10023 , H01S3/10092 , H01S2301/04
摘要： Disclosed is a long-band (L-band) fiber amplifier using a feedback loop which includes a rare earth doped fiber as an amplification medium, forward and backward pump laser diodes, positioned on front and rear ends of the rare earth doped fiber, respectively, for generating pumping lights, first wavelength selective couplers for providing the pumping lights from the pump laser diodes to the rare earth doped fiber, optical isolators, inserted into front and rear ends of the first wavelength selective couplers, respectively, for intercepting backward propagation of signal lights reflected from input and output terminals of the fiber amplifier, a feedback loop for making a seed beam incident to the rare earth doped fiber or making an amplified spontaneous emission (ASE) incident again to the rare earth doped fiber, second wavelength selective couplers, provided between the optical isolators and the first wavelength selective couplers, respectively, for making the seed beam incident to the feedback loop or extracting and providing the ASE to the feedback loop, and a filter, connected to the feedback loop, for filtering a specified wavelength of the seed beam or the ASE.
摘要翻译：公开了一种使用反馈回路的长波段（L波段）光纤放大器，其包括稀土掺杂光纤作为放大介质，分别位于稀土掺杂光纤的前端和后端的前向和后向激光二极管，用于产生泵浦光的第一波长选择耦合器，用于分别从第一波长选择耦合器插入到第一波长选择耦合器的前端和后端，从泵浦激光二极管分别提供泵浦光到稀土掺杂光纤，光隔离器，用于截取反向传播从光纤放大器的输入和输出端反射的信号光，用于使种子光束入射到稀土掺杂光纤的反馈回路或再次对稀土掺杂光纤进行放大的自发发射（ASE）入射;第二波长选择耦合器分别设置在光隔离器和第一波长选择耦合器之间，用于使种子束入射到该光隔离器反馈回路或提取ASE并将其提供给反馈回路，以及连接到反馈回路的滤波器，用于过滤种子束或ASE的指定波长。

9. 发明授权

US06339494B1 Gain flattened optical fiber amplifier 失效
标题翻译：增益平坦的光纤放大器
公开(公告)号：US06339494B1
公开(公告)日：2002-01-15
申请号：US09482536
申请日：2000-01-14
申请人： Seong-Teak Hwang , Soo-Young Yoon , Rae-Sung Jung
发明人： Seong-Teak Hwang , Soo-Young Yoon , Rae-Sung Jung
IPC分类号： H01S300
CPC分类号： H04B10/2941 , H01S3/06754 , H01S3/06758 , H01S3/094011 , H01S2301/04 , H04B2210/003
摘要： An optical fiber amplifier capable of having a flattened gain irrespective of the intensity of an input signal light. The optical fiber amplifier includes a first amplifying unit for amplifying an input signal light using a first pumping light to obtain a predetermined gain, a second amplifying unit for re-amplifying the signal light amplified by the first amplifying unit, using a second pumping light, to obtain the same gain as the predetermined gain, and a pumping light separating unit for allowing the amplified signal light outputted from the first amplifying unit to enter the second amplifying unit while preventing the first pumping light from reaching the second amplifying unit and preventing the second pumping light from reaching the first amplifying unit, whereby the amplified signal light entering the second amplifying unit is allowed to be amplified only by the second pumping light.
摘要翻译：能够与输入信号光的强度无关地具有扁平增益的光纤放大器。光纤放大器包括：第一放大单元，用于使用第一泵浦光放大输入信号光以获得预定增益;第二放大单元，用于使用第二泵浦光对由第一放大单元放大的信号光进行再放大; 以获得与预定增益相同的增益;以及泵浦光分离单元，用于允许从第一放大单元输出的放大信号光进入第二放大单元，同时防止第一泵浦光到达第二放大单元，并防止第二放大单元泵浦光到达第一放大单元，由此仅允许通过第二泵浦光放大进入第二放大单元的放大信号光。

10. 发明授权

US06337764B1 Optical fiber amplifier for controlling gain flatness 失效
标题翻译：用于控制增益平坦度的光纤放大器
公开(公告)号：US06337764B1
公开(公告)日：2002-01-08
申请号：US09448871
申请日：1999-11-24
申请人： Soo-young Yoon , Rae-sung Jung , Seong-taek Hwang , Sung-jin Kim
发明人： Soo-young Yoon , Rae-sung Jung , Seong-taek Hwang , Sung-jin Kim
IPC分类号： H01S300
CPC分类号： H04B10/296 , H01S3/06754 , H01S3/1301 , H01S2301/04
摘要： An optical fiber amplifier for controlling gain flatness including an optical fiber amplifying unit for amplifying input signal light according to a predetermined amplification control value, a measuring unit for measuring the power level of amplified spontaneous emission (ASE) at a predetermined wavelength band output from the optical fiber amplifying unit, and a gain controller for controlling the amplification control value of the optical fiber amplifying unit according to the measured power level of the ASE to flatten the gain of the optical fiber amplifying unit. The gain flatness of amplified signal light is monitored and controlled, thereby obtaining gain-flattened signal light even when power level of signal light varies from wavelength to wavelength.
摘要翻译：一种用于控制增益平坦度的光纤放大器，包括用于根据预定的放大控制值放大输入信号光的光纤放大单元;测量单元，用于测量从所述放大控制值输出的预定波长带的放大自发发射（ASE）的功率电平光纤放大单元和增益控制器，用于根据测量的ASE的功率电平来控制光纤放大单元的放大控制值，以平滑光纤放大单元的增益。监视和控制放大信号光的增益平坦度，从而即使在信号光的功率电平从波长变化到波长时也获得增益平坦的信号光。

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