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31. 发明授权

US5745283A Method and apparatus for controlling optical amplifier used for optically amplifying wavelength-division multiplexed signal 失效
标题翻译：用于控制用于光学放大波分复用信号的光放大器的方法和装置
公开(公告)号：US5745283A
公开(公告)日：1998-04-28
申请号：US697252
申请日：1996-08-21
申请人： Shinya Inagaki , Kenji Tagawa , Norifumi Shukunami , Nobuhiro Fukushima
发明人： Shinya Inagaki , Kenji Tagawa , Norifumi Shukunami , Nobuhiro Fukushima
IPC分类号： G02F1/35 , H01S3/06 , H01S3/067 , H01S3/07 , H01S3/10 , H01S3/13 , H01S3/131 , H04B10/077 , H04B10/079 , H04B10/11 , H04B10/29 , H04J14/02 , H01S3/00
CPC分类号： H04B10/2912 , H01S3/1301 , H04B10/291 , H04B10/2942 , H04B10/296 , H04J14/0221 , H01S3/06754 , H01S3/094096
摘要： A method and apparatus for controlling gain differences between optical signals, and hence an output of each individual optical signal, in an optical amplifier including a rare-earth-doped fiber for optically amplifying a wavelength-division multiplexed signal. Pumping light is injected into an erbium-doped fiber that is also supplied with additional pumping light that gives a different gain characteristic to the erbium-doped fiber. The output of each signal light is detected by a photodetector and, based on the detected output, injection power is controlled individually for each pumping light.
摘要翻译：一种用于在包括用于光学放大波分复用信号的稀土掺杂光纤的光放大器中控制光信号之间的增益差，从而控制每个单独光信号的输出的方法和装置。泵浦光被注入到掺铒光纤中，该掺铒光纤也被提供附加的泵浦光，这给掺铒光纤提供不同的增益特性。每个信号光的输出由光电检测器检测，并且基于检测到的输出，针对每个泵浦光分别控制喷射功率。

32. 发明授权

US08687982B2 OSNR measuring device and optical communication system 失效
标题翻译： OSNR测量装置和光通信系统
公开(公告)号：US08687982B2
公开(公告)日：2014-04-01
申请号：US13160294
申请日：2011-06-14
申请人： Kentaro Nakamura , Norifumi Shukunami
发明人： Kentaro Nakamura , Norifumi Shukunami
IPC分类号： H04J14/02 , H04B10/079
CPC分类号： H04B10/07953
摘要： An OSNR measuring device n OSNR measuring device includes an input port to which a signal light is given; a wavelength filter which includes a variable passband, and selectively takes out an optical component corresponding to a signal optical wavelength to be measured from the signal light; a wavelength control circuit which controls the passband of the wavelength filter; a delay interferometer which branches a light output from the wavelength filter and delays one of the branched lights with respect to the other branched light and in which the branched lights are made to interfere with each other; a photodetector which detects a power of a delay interference light output; and an OSNR calculation circuit which calculates, based on a bandwidth of a passband of the wavelength filter and the power of the delay interference light, an optical signal to noise ratio of a signal optical wavelength to be measured.
摘要翻译： OSNR测量装置n OSNR测量装置包括给予信号光的输入端口; 包括可变通带的波长滤波器，并且从所述信号光中选择性地取出与要测量的信号光波长对应的光学分量; 波长控制电路，其控制所述波长滤波器的通带; 延迟干涉仪，其分支来自所述波长滤波器的光输出，并且相对于所述另一分支光延迟所述分支光中的一个，并且使所述分支光彼此干涉; 光检测器，其检测延迟干涉光输出的功率; 以及OSNR计算电路，其基于波长滤波器的通带的带宽和延迟干扰光的功率，计算要测量的信号光波长的光信噪比。

33. 发明授权

US07924499B2 Gain and signal level adjustments of cascaded optical amplifiers 有权
公开(公告)号：US07924499B2
公开(公告)日：2011-04-12
申请号：US12822797
申请日：2010-06-24
申请人： Shinya Inagaki , Norifumi Shukunami , Susumu Kinoshita , Hiroyuki Itou , Taiki Kobayashi
发明人： Shinya Inagaki , Norifumi Shukunami , Susumu Kinoshita , Hiroyuki Itou , Taiki Kobayashi
IPC分类号： H01S3/00
CPC分类号： H04B10/2942 , H01S3/06758 , H01S3/1301 , H01S3/1305 , H04B10/2912 , H04B10/2941 , H04B2210/003
摘要： An optical amplification device which includes first and second optical amplifiers, and a controller. The first optical amplifier receives a light and amplifies the received light. The second optical amplifier receives the light amplified by the first optical amplifier, and amplifies the received light. When a level of the light received by the first optical amplifier changes by Δ, the controller controls a level of the light received by the second optical amplifier to change by approximately −Δ. In various embodiments, the controller causes the sum of the gains of the first and second optical amplifiers to be constant. In other embodiments, the optical amplification device includes first and second optical amplifier and a gain adjustor. The gain adjustor detects a deviation in gain of the first optical amplifier from a target gain, and adjusts the gain of the second optical amplifier to compensate for the detected deviation.

34. 发明授权

US07899296B2 Optical fiber reel 有权
标题翻译：光纤卷轴
公开(公告)号：US07899296B2
公开(公告)日：2011-03-01
申请号：US12143341
申请日：2008-06-20
申请人： Norifumi Shukunami , Kazunori Miura , Hiroki Horiuchi
发明人： Norifumi Shukunami , Kazunori Miura , Hiroki Horiuchi
IPC分类号： G02B6/00
CPC分类号： G02B6/4457 , H01S3/06704 , H01S3/06754 , H01S3/1608
摘要： An optical fiber reel storing a plurality of optical fibers having an annular frame; a first reel portion provided around an radially outer peripheral surface of the annular frame and receiving at least one of the plurality of optical fibers wound up around the radially outer peripheral surface; and, a second reel portion provided radially inside the annular frame and housing at least one of the plurality of optical fiber therein.
摘要翻译：一种存储多个具有环形框架的光纤的光纤卷筒; 第一卷轴部分，设置在所述环形框架的径向外周表面周围并且容纳围绕所述径向外周表面缠绕的所述多根光纤中的至少一个; 以及第二卷轴部分，其设置在所述环形框架的径向内部并且容纳所述多根光纤中的至少一个光纤。

35. 发明授权

US07296940B2 Optical fiber connecting portion structure and light monitor apparatus 有权
标题翻译：光纤连接部分结构和光监测装置
公开(公告)号：US07296940B2
公开(公告)日：2007-11-20
申请号：US11583107
申请日：2006-10-19
申请人： Norifumi Shukunami , Hiroyuki Furukawa , Keiko Sasaki
发明人： Norifumi Shukunami , Hiroyuki Furukawa , Keiko Sasaki
IPC分类号： G02B6/255 , G02B5/02
CPC分类号： G02B6/2551 , G02B6/2558 , G02B6/266 , G02B6/4286
摘要： An optical apparatus of the invention has a fusion splice portion where respective ends of two optical fibers each having a core, a cladding, and a UV coat portion provided on the outside of the cladding are fusion spliced, and a re-coat portion which re-coats a portion where the UV coat portion is removed in the vicinity of the fusion splice portion is formed using a material capable of absorbing light radiated from the fusion splice portion. As a result light which is radiated from the fusion splice portion can be reliably prevented from coupling into another optical fiber adjacent to an outside of the re-coat portion.
摘要翻译：本发明的光学装置具有熔接部分，其中两个光纤的各个端部分别具有设置在包层外侧的芯，包层和UV涂层部分，熔接部分和再涂覆部分 - 使用能够吸收从熔接部辐射的光的材料形成在熔接部附近除去UV涂层部分的部分。结果，可以可靠地防止从熔接部辐射的光与再次涂布部的外侧相邻的光纤耦合。

36. 发明授权

US07209284B2 Optical amplifier using reflection-type variable optical attenuator for feedback 有权
标题翻译：光放大器采用反射型可变光衰减器进行反馈
公开(公告)号：US07209284B2
公开(公告)日：2007-04-24
申请号：US11185874
申请日：2005-07-21
申请人： Norifumi Shukunami , Norihisa Naganuma , Yuichi Suzuki , Takashi Ishiwada
发明人： Norifumi Shukunami , Norihisa Naganuma , Yuichi Suzuki , Takashi Ishiwada
IPC分类号： H01S4/00 , G02B26/02 , G02B5/30 , G02F1/19
CPC分类号： H04B10/2931 , G02F1/0123 , G02F1/093 , H01S3/005 , H01S3/0064 , H01S3/06754 , H01S3/06758 , H01S3/094015 , H01S3/10015 , H01S3/10023 , H01S3/1305 , H01S3/1608 , H04B10/2941
摘要： An optical apparatus which is reduced in the number of optical devices arranged on a main optical signal transmission path, thereby reducing the size and cost of the device, and which is improved in optical transmission quality. An optical amplifier includes an amplification medium, which is doped with an active material for optical amplification and to which pump light is introduced, for amplifying an optical signal to be output. A reflection-type variable optical attenuator includes a reflecting mirror for reflecting an input light to generate a reflected light, and a magneto-optical crystal arranged in a position where the input and reflected lights pass. The magneto-optical crystal is applied with a magnetic field to induce a Faraday rotation angle therein and thereby vary an attenuation amount of the amplified optical signal, and part of light transmitted through the reflecting mirror is converted, as input monitor light, into an electrical signal.
摘要翻译：减少了布置在主光信号传输路径上的光学装置的数量的光学装置，从而减小了装置的尺寸和成本，并提高了光传输质量。光放大器包括一个放大介质，其被掺入用于光放大的有源材料并被引入泵浦光，用于放大要输出的光信号。反射型可变光衰减器包括用于反射输入光以产生反射光的反射镜和布置在输入和反射光通过的位置的磁光晶体。磁光晶体被施加有磁场以在其中诱发法拉第旋转角度，从而改变放大的光信号的衰减量，并且透射通过反射镜的光的一部分作为输入监视光转换成电信号。

37. 发明授权

US06891662B2 Optical amplifier and method for amplifying wavelength multiplexed transmission signal light 有权
标题翻译：光放大器和放大波长复用传输信号光的方法
公开(公告)号：US06891662B2
公开(公告)日：2005-05-10
申请号：US10013839
申请日：2001-12-13
申请人： Yasushi Sugaya , Etsuko Hayashi , Terumi Chikama , Sinya Inagaki , Norifumi Shukunami
发明人： Yasushi Sugaya , Etsuko Hayashi , Terumi Chikama , Sinya Inagaki , Norifumi Shukunami
IPC分类号： H01S3/10 , H01S3/06 , H01S3/067 , H01S3/094 , H04B10/29 , H04B10/296 , H04J14/00 , H04J14/02 , H01S3/00
CPC分类号： H01S3/06758 , H01S3/094003 , H01S2301/04
摘要： A rare earth element doped fiber forming an optical amplifier is pumped with a plurality of pumping lights to prevent drop of the inversion population ratio in the length direction of the rare earth element doped fiber.
摘要翻译：用多个泵浦光泵浦形成光放大器的稀土元素掺杂光纤，以防止稀土元素掺杂光纤的长度方向上的反转种群比例下降。

38. 发明授权

US06856455B2 Light source apparatus, optical amplifier and optical communication system 有权
标题翻译：光源装置，光放大器及光通讯系统
公开(公告)号：US06856455B2
公开(公告)日：2005-02-15
申请号：US10214311
申请日：2002-08-08
申请人： Norihisa Naganuma , Norifumi Shukunami
发明人： Norihisa Naganuma , Norifumi Shukunami
IPC分类号： H01S3/10 , H01S3/06 , H01S3/067 , H01S3/0933 , H01S3/094 , H01S5/00 , H04B10/2537 , H04B10/294 , H04B10/40 , H04B10/50 , H04B10/60 , H01S3/00
CPC分类号： H01S3/06754 , H01S3/0933 , H01S3/094011 , H01S3/094096
摘要： An apparatus has first and second light sources, a plurality of filters, and an optical switch. The light sources output a light beam having a spectrum determined by a gain band thereof. The plurality of filters each have a reflection band included in the gain band. The optical switch selectively couples the filters to the light source. The first and second light sources provide pumping light to a single transmission line. The first and second filters are configured so as to not reflect signal light to be amplified.
摘要翻译：一种装置具有第一和第二光源，多个滤光器和光开关。光源输出具有由其增益带确定的光谱的光束。多个滤光器各自具有包括在增益带中的反射波段。光开关选择性地将滤光片耦合到光源。第一和第二光源向单个传输线提供泵浦光。第一滤波器和第二滤波器被配置为不反射要被放大的信号光。

39. 发明授权

US06452720B1 Light source apparatus, optical amplifier and optical communication system 失效
标题翻译：光源装置，光放大器及光通讯系统
公开(公告)号：US06452720B1
公开(公告)日：2002-09-17
申请号：US08889875
申请日：1997-07-08
申请人： Norihisa Naganuma , Norifumi Shukunami
发明人： Norihisa Naganuma , Norifumi Shukunami
IPC分类号： H01S300
CPC分类号： H01S3/06754 , H01S3/0933 , H01S3/094011 , H01S3/094096
摘要： A light source apparatus suitable for use for evaluation of an optical device and for production of pump light for an optical amplifier. The apparatus includes a light emitting element having a gain band and a band reflection filter optically connected to the light emitting element. The light emitting element outputs a light beam having a spectrum which is determined by the gain band. The filter produces, from the light beam outputted from the light emitting element, a transmission beam and a reflection beam which returns to the light emitting element. The filter has a reflection band included in the gain band of the light emitting element and narrower than the gain band, and the transmission beam of the filter has a maximum power higher than the maximum power of the light beam to be outputted from the light emitting element. With the construction, pump light having a maximum power higher than the maximum power of the light to be outputted from the light emitting element can be obtained. Further, since the center wavelength of the light beam to be obtained is determined by the reflection band of the filter, even if the gain band or spectrum of the light emitting element has some dispersion, a light beam having a desired center wavelength can be obtained, and this allows evaluation of an optical device.
摘要翻译：一种光源装置，适用于光学装置的评估和用于生产用于光放大器的泵浦光。该装置包括具有增益带的光发射元件和与发光元件光学连接的带反射滤光器。发光元件输出具有由增益带决定的光谱的光束。滤光器从发光元件输出的光束产生透射光束和返回到发光元件的反射光束。滤光器具有包括在发光元件的增益带中并且比增益带窄的反射带，并且滤光器的透射束具有比从发光的光束输出的光束的最大功率高的最大功率元件。通过这种结构，可以获得具有高于从发光元件输出的光的最大功率的最大功率的泵浦光。此外，由于要获得的光束的中心波长由滤光器的反射带确定，所以即使发光元件的增益带或光谱具有某种色散，也可以获得具有期望的中心波长的光束，并且这允许评估光学装置。

40. 发明授权

US6061173A Wavelength-division-multiplexing optical amplifier 有权
标题翻译：波分复用光放大器
公开(公告)号：US6061173A
公开(公告)日：2000-05-09
申请号：US207829
申请日：1998-12-07
申请人： Kazuo Yamane , Michikazu Shima , Yumiko Kawasaki , Kenji Tagawa , Shinya Inagaki , Norifumi Shukunami
发明人： Kazuo Yamane , Michikazu Shima , Yumiko Kawasaki , Kenji Tagawa , Shinya Inagaki , Norifumi Shukunami
IPC分类号： H01S3/094 , H01S3/13 , H04B10/17 , H04J14/02 , G02B6/26
CPC分类号： H04B10/296 , H01S3/1301 , H04J14/0221 , H01S2302/00 , H01S2303/00 , H01S3/094096
摘要： An optical amplifier amplifies a wavelength-division-multiplexed optical input signal composed of optical signals having different wavelengths such that the output level of each of the optical signal is always optimized and such that the difference between the gains of the amplifier on the optical signals is minimized when the number of optical signals is two. The output level of the amplifier is controlled according to the number of the optical signals, to optimize the output level of each of the optical signals.
摘要翻译：光放大器放大由具有不同波长的光信号组成的波分复用光输入信号，使得每个光信号的输出电平始终被优化，并且使得放大器在光信号上的增益之间的差为光信号数为2时最小化。根据光信号的数量控制放大器的输出电平，以优化每个光信号的输出电平。

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