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。

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。

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。

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。

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。

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。