专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

71. 发明授权

US06344914B1 Gain equalizer which includes a plurality of optical filters for equalizing the gain of an optical amplifier 失效
标题翻译：增益均衡器，其包括用于均衡光放大器的增益的多个滤光器
公开(公告)号：US06344914B1
公开(公告)日：2002-02-05
申请号：US08805825
申请日：1997-02-26
申请人： Naomasa Shimojoh , Takafumi Terahara , Terumi Chikama
发明人： Naomasa Shimojoh , Takafumi Terahara , Terumi Chikama
IPC分类号： H04B1002
CPC分类号： H04B10/2941 , H01S3/10023 , H01S3/1312 , H01S2301/04 , H04B10/2942 , H04J14/0221
摘要： A gain equalizer which equalizes gain versus wavelength characteristics of an optical amplifier. The gain versus wavelength characteristics of the optical amplifier include first, second and third gain peaks in a wavelength band with the second gain peak being between the first and third gain peaks. The optical amplifier amplifies an input signal in accordance with the gain versus wavelength characteristics to produce an output signal. The gain equalizer includes first, second and third optical filters having first, second and third transparency characteristics, respectively. The first, second and third transparency characteristics are periodic waveforms having different periods related to the wavelength difference between the first and third gain peaks. The second transparency characteristic is a periodic waveform having a period equal to 1/(2n) of the period of the waveform of the first transparency characteristic. The third transparency characteristic is a periodic waveform having a period equal to ¼ of the period of the waveform of the first transparency characteristic. For example, the first transparency characteristic is a periodic waveform with ¼ period extending between the first and third gain peaks, the second transparency characteristic is a periodic waveform with one period extending between the first and third gain peaks, and the third transparency characteristic is a periodic waveform with two periods extending between the first and third gain peaks.
摘要翻译：增益均衡器，其均衡光放大器的增益对波长特性。光放大器的增益对波长特性包括波长带中的第一，第二和第三增益峰值，第二增益峰值在第一和第三增益峰值之间。光放大器根据增益对波长特性来放大输入信号以产生输出信号。增益均衡器包括分别具有第一，第二和第三透明特性的第一，第二和第三滤光器。第一，第二和第三透明度特征是具有与第一和第三增益峰值之间的波长差有关的不同周期的周期性波形。第二透明特性是周期等于第一透明特性的波形的周期的1 /（2n）的周期波形。第三透明特性是周期等于第一透明特性的波形周期的1/4的周期波形。例如，第一透明特性是在第一和第三增益峰之间延伸的1/4周期的周期波形，第二透明特性是周期性波形，其中一个周期在第一和第三增益峰之间延伸，第三透明特性是具有在第一和第三增益峰之间延伸的两个周期的周期性波形。

72. 发明授权

US06307656B2 Bi-directional wavelength switching device and wavelength demultiplexing/multiplexing device 有权
标题翻译：双向波长切换装置和波长解复用/多路复用装置
公开(公告)号：US06307656B2
公开(公告)日：2001-10-23
申请号：US09778774
申请日：2001-02-08
申请人： Takafumi Terahara
发明人： Takafumi Terahara
IPC分类号： H04J1402
CPC分类号： H04J14/021 , H04J14/0206 , H04J14/0209 , H04J14/0212 , H04J14/0213 , H04J14/0216 , H04J14/0217 , H04J14/0221
摘要： An optical device has an optical switching unit and a variable filter, the optical switching unit connects a pair of single direction optical transmission lines to a bi-directional optical transmission line carrying optical signals of different wavelengths in different directions relative to the optical switching unit. The single direction optical transmission lines carry optical signals in single different directions relative to the optical switching unit. The variable filter has first and second opposing terminal pairs such that optical signals of different wavelengths input to one terminal of one terminal pair are filtered with a portion of the different wavelengths being output to one terminal of the opposing terminal pair and the remainder of the different wavelengths being output to the other terminal of the opposing terminal pair. The bi-directional optical transmission line is coupled to one terminal of the variable filter. The optical switching unit may include an optical circulator. The variable filter may be an acousto-optic tunable filter. The optical device have a pair of optical switching units respectively connecting two pairs of single direction optical transmission lines to two opposing terminals of the variable filter through two bi-directional optical transmission lines.
摘要翻译：光学装置具有光学开关单元和可变滤波器，光开关单元将一对单向光传输线连接到双向光传输线路，该双向光传输线路相对于光开关单元在不同方向上携载不同波长的光信号。单向光传输线相对于光开关单元在单个不同方向上携带光信号。可变滤波器具有第一和第二相对端子对，使得输入到一个端子对的一个端子的不同波长的光信号被不同波长的一部分输出到相对端子对的一个端子并且其余的不同的波长输出到相对端子对的另一个端子。双向光传输线耦合到可变滤波器的一个端子。光开关单元可以包括光循环器。可变滤波器可以是声光可调滤波器。该光学器件具有一对光开关单元，其通过两个双向光传输线分别将两对单向光传输线路连接到可变滤波器的两个相对端子。

73. 发明授权

US06271945B1 Apparatus and method for controlling power levels of individual signal lights of a wavelength division multiplexed signal light 有权
标题翻译：用于控制波分复用信号光的各信号光的功率电平的装置和方法
公开(公告)号：US06271945B1
公开(公告)日：2001-08-07
申请号：US09395168
申请日：1999-09-14
申请人： Takafumi Terahara
发明人： Takafumi Terahara
IPC分类号： H04J1402
CPC分类号： H04J14/0221 , H04B10/505 , H04B10/506 , H04B10/564
摘要： An apparatus and method for controlling power levels of individual signal lights of a wavelength division multiplexed (WDM) signal light. The apparatus includes an optical fiber, a coupler and a controller. The WDM signal light travels through the optical fiber. The WDM signal light includes a plurality of individual signal lights which each have a corresponding power level. The coupler decouples a portion of the WDM signal light from the optical fiber. The controller determines the spectrum of the WDM signal light from the decoupled portion and controls the power levels of the plurality of individual signal lights in accordance with the determined spectrum. More specifically, the controller can control the relative power levels of the plurality of individual signal lights with respect to each other. In addition, the controller can control the power levels of the plurality of individual signal lights to perform preemphasis on the WDM signal light. The controller can control the power levels of the plurality of individual signal lights to obtain substantially equal signal to noise ratios of the plurality of individual signal lights as received by a receiver through the optical fiber. The method includes the steps of (a) decoupling a portion of a WDM signal light travelling through an optical fiber (b) determining the spectrum of the WDM signal light from the decoupled portion, and (c) controlling the power levels of individual signal lights of the WDM signal light in accordance with the determined spectrum.
摘要翻译：一种用于控制波分复用（WDM）信号光的各信号光的功率电平的装置和方法。该装置包括光纤，耦合器和控制器。 WDM信号光穿过光纤。 WDM信号灯包括多个单独的信号灯，每个信号灯具有相应的功率电平。耦合器将WDM信号光的一部分与光纤分离。控制器确定来自解耦部分的WDM信号光的光谱，并根据所确定的光谱来控制多个单独信号光的功率电平。更具体地，控制器可以相对于彼此控制多个个体信号光的相对功率电平。此外，控制器可以控制多个单独的信号光的功率电平来对WDM信号光进行预加重。控制器可以控制多个单独的信号光的功率电平，以获得由接收机通过光纤接收的多个单独的信号光的信噪比。该方法包括以下步骤：（a）将通过光纤传播的WDM信号光的一部分去耦（b），以确定来自解耦部分的WDM信号光的光谱，以及（c）控制各信号光的功率电平的WDM信号光。

74. 发明授权

US06222655B1 Wavelength division multiplex optical amplification transmission system and optical amplifier 失效
标题翻译：波分复用光放大传输系统和光放大器
公开(公告)号：US06222655B1
公开(公告)日：2001-04-24
申请号：US09007655
申请日：1998-01-15
申请人： Takafumi Terahara
发明人： Takafumi Terahara
IPC分类号： H04J1402
CPC分类号： H04B10/2941 , H04J14/0221
摘要： A wavelength division multiplex optical amplification transmission system has a broad signal wavelength band and can be easily constructed. A transmission line provided between a lightwave transmitting terminal station and a lightwave receiving terminal station is constructed of optical amplifiers, optical filters and a transmission line. Structuring the transmission line involves the use of an optical amplifier utilizing high-concentration Al added EDFA, thereby proving a module excluding the optical filters with a gain wavelength characteristic in which a gain peak exists within a target wavelength range that should be a signal wavelength band, and there is an ill-balanced symmetry with respect to the gain peak in the target wavelength range. Used is the optical filter given a loss wavelength characteristic in which a loss maximum wavelength with a maximum loss exists in the target wavelength range, a gain simply decreases as a distance from the loss maximum wavelength increases within the target wavelength range, and a characteristic obtained by adding the loss wavelength characteristics is relatively coincident in values with the gain wavelength characteristic.
摘要翻译：波分复用光放大传输系统具有宽的信号波长带，并且可以容易地构造。设置在光波发射终端站和光波接收终端站之间的传输线由光放大器，光滤波器和传输线构成。构造传输线包括使用利用高浓度Al添加的EDFA的光放大器，从而证明除了具有增益波长特性的滤光器之外的模块，其中增益峰值存在于应当是信号波长带的目标波长范围内并且相对于目标波长范围内的增益峰值存在不平衡的对称性。使用的是具有损耗波长特性的滤光器，其中在目标波长范围内存在具有最大损耗的损耗最大波长，随着距离损耗最大波长的距离在目标波长范围内增加，增益简单地减小，并且获得的特性通过添加损耗波长特性在具有增益波长特性的值中相对一致。

75. 发明授权

US6061172A Active optical fiber and optical fiber amplifier 失效
标题翻译：有源光纤和光纤放大器
公开(公告)号：US6061172A
公开(公告)日：2000-05-09
申请号：US162144
申请日：1998-09-29
申请人： Takao Naito , Naomasa Shimojoh , Takafumi Terahara
发明人： Takao Naito , Naomasa Shimojoh , Takafumi Terahara
IPC分类号： G02B5/18 , G02B6/02 , H01S3/06 , H01S3/067 , H01S3/07 , H01S3/094 , H01S3/10 , H01S3/16 , H01S3/00
CPC分类号： H01S3/094003 , H01S3/0675 , H01S3/1608
摘要： The present invention aims at providing an active optical fiber and an optical fiber amplifier, in which a conversion efficiency of pumping light to be input into the active optical fiber is increased to thereby improve optical amplification characteristic. To this end, the active optical fiber of the present invention is formed with fiber gratings arranged over a predetermined region along the longitudinal direction within the optical fiber doped with a rare earth element, and transmitting signal light and reflecting pumping light. Further, the optical fiber amplifier of the present invention is constituted to comprise a pumping light source for generating pumping light, and a multiplexer for multiplexing signal light and the pumping light to thereby output them into one end of the active optical fiber. Thus, the pumping light is reflected by the fiber gratings so as to go and return within the active optical fiber, thereby improving the conversion efficiency of the pumping light.
摘要翻译：本发明的目的在于提供一种有源光纤和光纤放大器，其中增加输入有源光纤的泵浦光的转换效率，从而提高光放大特性。为此，本发明的有源光纤由掺杂有稀土元素的光纤内沿着长度方向的预定区域配置的光纤光栅形成，并且传输信号光并反射泵浦光。此外，本发明的光纤放大器构成为包括用于产生泵浦光的泵浦光源和用于复用信号光的多路复用器和泵浦光，从而将其输出到有源光纤的一端。因此，泵浦光被光纤光栅反射，从而在有源光纤内返回，从而提高了泵浦光的转换效率。

76. 发明授权

US09031418B2 Communication system, measuring apparatus, transmitting apparatus, and measurement method 有权
标题翻译：通信系统，测量装置，发送装置和测量方法
公开(公告)号：US09031418B2
公开(公告)日：2015-05-12
申请号：US13292430
申请日：2011-11-09
申请人： Masahiro Yuki , Takafumi Terahara , Norifumi Shukunami
发明人： Masahiro Yuki , Takafumi Terahara , Norifumi Shukunami
IPC分类号： H04B10/077 , H04B10/564 , H04B10/2507 , H04J14/06 , H04B10/50 , H04B10/532 , H04J14/02
CPC分类号： H04B10/0779 , H04B10/0775 , H04B10/2572 , H04B10/5057 , H04B10/532 , H04B10/564 , H04B2210/075 , H04J14/0204 , H04J14/0205 , H04J14/022 , H04J14/0275 , H04J14/0276 , H04J14/0283 , H04J14/06
摘要： A communication system including: a transmission apparatus configured to modulate a first light by using a first signal to be transferred and a second signal having a frequency different from a frequency of the first signal so as to generate a first optical signal, modulate a second light by using a third signal to be transferred and a fourth signal having a frequency different from a frequency of the third signal so as to generate a second optical signal, polarization-multiplex the first optical signal and the second optical signal, and transmit a polarization-multiplexed optical signal in which the first optical signal and the second optical signal are polarization-multiplexed, each of the first light and the second light being polarized; and a measuring apparatus configured to measure powers of the second signal and the fourth signal which are included in the polarization-multiplexed optical signal transmitted from the transmission apparatus.
摘要翻译：一种通信系统，包括：发送装置，被配置为通过使用要传送的第一信号和具有与所述第一信号的频率不同的频率的第二信号来调制第一光，以产生第一光信号，调制第二光通过使用要传送的第三信号和具有与第三信号的频率不同的频率的第四信号，以产生第二光信号，对第一光信号和第二光信号进行极化复用，第一光信号和第二光信号被偏振复用的多路复用光信号，第一光和第二光中的每一个都被偏振; 以及测量装置，被配置为测量包括在从发送装置发送的偏振复用光信号中的第二信号和第四信号的功率。

77. 发明授权

US08958695B2 Optical adding and dropping device and optical transmission apparatus 有权
标题翻译：光学滴滴装置和光传输装置
公开(公告)号：US08958695B2
公开(公告)日：2015-02-17
申请号：US12338123
申请日：2008-12-18
申请人： Hiroki Ooi , Takafumi Terahara , Kentaro Nakamura , Chihiro Ohshima , Tsuyoshi Yamamoto
发明人： Hiroki Ooi , Takafumi Terahara , Kentaro Nakamura , Chihiro Ohshima , Tsuyoshi Yamamoto
IPC分类号： H04J14/02
CPC分类号： H04J14/0213 , H04J14/0205 , H04J14/0206 , H04J14/0208 , H04J14/0212
摘要： An optical adding and dropping device includes a drop section including an input port and having a through port and a plurality of drop ports set as output ports, a first multiplexer adapted to multiplex light from the through port and light from a plurality of add ports, and a spectrum foot removing section provided on the input side of the first multiplexer and adapted to remove a foot of a spectrum of light to be inputted from the add ports to the first multiplexer. The optical adding and dropping device can be configured at a low cost while it has adding and dropping functions.
摘要翻译：一种光分插装置，包括具有输入端口，具有通孔和设置为输出端口的多个分支端口的放置部分，第一多路复用器，用于复用来自通孔的光和来自多个附加端口的光，以及频谱测量脚移除部分，设置在第一多路复用器的输入侧，并且适于将要从添加端口输入的光谱的一个脚部移除到第一多路复用器。光放大装置可以以低成本配置，具有添加和删除功能。

78. 发明授权

US08131152B2 Optical add/drop multiplexer 有权
标题翻译：光分插复用器
公开(公告)号：US08131152B2
公开(公告)日：2012-03-06
申请号：US12910497
申请日：2010-10-22
申请人： Yuichi Akiyama , Takafumi Terahara , Hiroki Ooi , Jens C. Rasmussen , Akira Miura , Akihiko Isomura
发明人： Yuichi Akiyama , Takafumi Terahara , Hiroki Ooi , Jens C. Rasmussen , Akira Miura , Akihiko Isomura
IPC分类号： H04B10/00
CPC分类号： H04Q11/0005 , H04J14/0204 , H04J14/0205 , H04J14/0206 , H04J14/0208 , H04J14/0209 , H04J14/0212 , H04J14/0213 , H04J14/0217 , H04J14/0219 , H04J14/022 , H04J14/0221 , H04Q2011/0009 , H04Q2011/0016 , H04Q2011/0032 , H04Q2011/0039 , H04Q2011/0075 , H04Q2011/0083
摘要： An optical add/drop multiplexer includes a first optical coupler receiving an optical signal including a plurality of multiplexed wavelengths, a wavelength blocker receiving the optical signal from the first optical coupler, and blocking at least one wavelength of the plurality of multiplexed wavelengths, a first wavelength selective switch, having one input port receiving the outputted optical signal from the first optical coupler and a plurality of output ports, demultiplexing a plurality of arbitrarily selected multiplexed wavelengths from the received optical signal, a second wavelength selective switch, having a plurality of input ports, each input port receiving a different optical signal and one output port, multiplexing a plurality of arbitrarily selected wavelength signals on the plurality of input ports, and a second optical coupler receiving the optical signal output from the wavelength blocker and multiplexed wavelength signal from the second wavelength selective switch.
摘要翻译：光分插复用器包括接收包括多个复用波长的光信号的第一光耦合器，接收来自第一光耦合器的光信号的波长阻挡器，以及阻挡多个复用波长的至少一个波长;第一波长选择开关，具有从所述第一光耦合器接收输出的光信号的一个输入端口和多个输出端口，从所接收的光信号中解复用多个任意选择的复用波长;第二波长选择开关，具有多个输入端口，每个输入端口接收不同的光信号和一个输出端口，在多个输入端口上复用多个任意选择的波长信号，以及接收从波长阻挡器输出的光信号的第二光耦合器和来自第二波长选择开关。

79. 发明授权

US07853148B2 Optical add/drop multiplexer 有权
标题翻译：光分插复用器
公开(公告)号：US07853148B2
公开(公告)日：2010-12-14
申请号：US12371278
申请日：2009-02-13
申请人： Yuichi Akiyama , Takafumi Terahara , Hiroki Ooi , Jens C. Rasmussen , Akira Miura , Akihiko Isomura
发明人： Yuichi Akiyama , Takafumi Terahara , Hiroki Ooi , Jens C. Rasmussen , Akira Miura , Akihiko Isomura
IPC分类号： H04B10/00
CPC分类号： H04Q11/0005 , H04J14/0204 , H04J14/0205 , H04J14/0206 , H04J14/0208 , H04J14/0209 , H04J14/0212 , H04J14/0213 , H04J14/0217 , H04J14/0219 , H04J14/022 , H04J14/0221 , H04Q2011/0009 , H04Q2011/0016 , H04Q2011/0032 , H04Q2011/0039 , H04Q2011/0075 , H04Q2011/0083
摘要： An optical add/drop multiplexer includes a first optical coupler receiving an optical signal including a plurality of multiplexed wavelengths, a wavelength blocker receiving the optical signal from the first optical coupler, and blocking at least one wavelength of the plurality of multiplexed wavelengths, a first wavelength selective switch, having one input port receiving the outputted optical signal from the first optical coupler and a plurality of output ports, demultiplexing a plurality of arbitrarily selected multiplexed wavelengths from the received optical signal, a second wavelength selective switch, having a plurality of input ports, each input port receiving a different optical signal and one output port, multiplexing a plurality of arbitrarily selected wavelength signals on the plurality of input ports, and a second optical coupler receiving the optical signal output from the wavelength blocker and multiplexed wavelength signal from the second wavelength selective switch.
摘要翻译：光分插复用器包括接收包括多个复用波长的光信号的第一光耦合器，接收来自第一光耦合器的光信号的波长阻挡器，以及阻挡多个复用波长的至少一个波长;第一波长选择开关，具有从所述第一光耦合器接收输出的光信号的一个输入端口和多个输出端口，从所接收的光信号中解复用多个任意选择的复用波长;第二波长选择开关，具有多个输入端口，每个输入端口接收不同的光信号和一个输出端口，在多个输入端口上复用多个任意选择的波长信号，以及接收从波长阻挡器输出的光信号的第二光耦合器和来自第二波长选择开关。

80. 发明授权

US07603007B2 Quadrature phase-shift keying modulator and phase shift amount controlling method for the same 有权
标题翻译：正交相移键控调制器及相移量控制方法
公开(公告)号：US07603007B2
公开(公告)日：2009-10-13
申请号：US12234931
申请日：2008-09-22
申请人： Takafumi Terahara , Takeshi Hoshida , Kentaro Nakamura , Yuichi Akiyama , Hiroki Ooi , Jens C. Rasmussen , Akira Miura
发明人： Takafumi Terahara , Takeshi Hoshida , Kentaro Nakamura , Yuichi Akiyama , Hiroki Ooi , Jens C. Rasmussen , Akira Miura
IPC分类号： G02B6/28
CPC分类号： H04B10/5053 , G02F1/0121 , G02F2001/212 , G02F2201/58 , G02F2203/21 , H04B10/505 , H04B10/50577 , H04B10/5561
摘要： The improved quadrature phase shift keying modulator has a structure such that the average light output power of phase-shift keying modulation light output from the combining unit is changed according to the phase difference between the first and the second optical signal after being combined by means of applying driving signals different in eye crossing percentage by the first modulator and the second modulator, respectively, and has a power monitor monitoring the average light output power of quadrature phase-shift keying modulated light and a phase shift controlling unit which performs feedback control of the phase shift amount in the phase shifting unit based on the average light output power monitored by the power monitor.
摘要翻译：改进的正交相移键控调制器具有这样的结构，使得从组合单元输出的相移键控调制光的平均光输出功率根据第一和第二光信号之间的相位差在通过通过第一调制器和第二调制器分别施加与眼睛交叉百分比不同的驱动信号，并且具有监视正交相移键控调制光的平均光输出功率的功率监视器和执行正交相移键控调制光的相位偏移控制单元的反相控制基于由功率监视器监视的平均光输出功率，移相单元中的相移量。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式