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。

公开(公告)号：US06993217B2

公开(公告)日：2006-01-31

申请号：US11180526

申请日：2005-07-14

申请人： Shinji Maruyama ,  Norihisa Naganuma

发明人： Shinji Maruyama ,  Norihisa Naganuma

IPC分类号： G02B6/26 ,  G02B6/42

CPC分类号： G02B6/12019 ,  G02B6/29328

摘要： In an optical switch device: output waveguides are arranged with such a pitch as to realize a split wavelength gap equal to or smaller than half of a gap between operating wavelengths of optical signals; at least two input waveguides are arranged with the same pitch; at least one slab waveguide spreads light from the input waveguides to be outputted to a grating element, condenses first light from the grating element to be outputted into the input waveguides, condenses second light from the grating element for each wavelength to be outputted into the output waveguides, and spreads light from the output waveguides to be outputted to the grating element; and the optical switch unit selects signals at an identical wavelength in adjacent output waveguides, and performs 2×2 switching of the signals so as to output the signals from the input waveguides.

摘要翻译： 在光开关装置中：输出波导以这样的间距排列，以实现等于或小于光信号工作波长之间的间隙的一半的分离波长间隙; 至少两个输入波导以相同的间距排列; 至少一个平板波导将来自输入波导的光展开以输出到光栅元件，将来自光栅元件的第一光凝结输出到输入波导中，将来自光栅元件的第二光从每个波长聚光以输出到输出 波导，并且从输出波导扩散光以输出到光栅元件; 并且光学开关单元选择相邻输出波导中相同波长的信号，并且执行信号的2×2切换，以输出来自输入波导的信号。

公开(公告)号：US20050094272A1

公开(公告)日：2005-05-05

申请号：US10821857

申请日：2004-04-12

申请人： Norihisa Naganuma ,  Nobuaki Mitamura ,  Shinji Maruyama ,  Hiroshi Nagaeda ,  Hirotomo Izumi

发明人： Norihisa Naganuma ,  Nobuaki Mitamura ,  Shinji Maruyama ,  Hiroshi Nagaeda ,  Hirotomo Izumi

IPC分类号： G02B26/00 ,  G02B5/18 ,  G02B5/28 ,  G02B6/34 ,  H04J14/02

CPC分类号： G02B6/29358 ,  G02B6/2937 ,  G02B6/29395 ,  H04B10/25073 ,  H04J14/02

摘要： Light emitted from an optical fiber is collimated by a collimating lens. An optical filter with a slit is placed in the path of the collimated light. The slit can be moved along a direction perpendicular to the path of the collimated light. When the slit is on the center of the collimated beam, because the intensity of light is high at the center, the diffraction loss of the light is high. When the slit is on the edge, because the light intensity is low at the edge, the diffraction loss is low. The diffraction loss has a wavelength characteristic and can be controlled by adjusting the position of the slit in the collimated beam.

摘要翻译： 由光纤发射的光被准直透镜准直。 具有狭缝的滤光器被放置在准直光的路径中。 狭缝可以沿着与准直光的路径垂直的方向移动。 当狭缝位于准直光束的中心时，由于光的中心强度高，所以光的衍射损耗高。 当狭缝在边缘上时，由于边缘处的光强度低，所以衍射损耗低。 衍射损耗具有波长特性，并且可以通过调整准直光束中的狭缝的位置来控制。

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。

公开(公告)号：US06829403B2

公开(公告)日：2004-12-07

申请号：US10290501

申请日：2002-11-08

申请人： Norihisa Naganuma

发明人： Norihisa Naganuma

IPC分类号： G02B635

CPC分类号： G02B6/352 ,  G02B6/3514 ,  G02B6/3546 ,  G02B6/3572

摘要： An optical switch includes a plurality of optical fibers arrayed at equal intervals and in parallel, each optical fiber having a central axis and having an end surface on one side of the optical switch. A single lens has a focal length and a central axis parallel to each fiber central axis, the lens disposed away from the fiber end surface at a distance corresponding to the focal length of the lens. A first mirror has a reflection surface perpendicular to the lens central axis, the first mirror removably disposed at a first position on the other side of the optical switch. A second mirror has a reflection surface inclined from the lens central axis, the second mirror removably disposed at the first position. One of the first and second mirrors is selectively disposed at the first position.

摘要翻译： 一种光开关包括以等间隔和平行布置的多个光纤，每个光纤具有中心轴线，并且在光开关的一侧具有端表面。 单个透镜具有平行于每个光纤中心轴的焦距和中心轴，该透镜以与透镜的焦距相对应的距离远离光纤端面设置。 第一反射镜具有垂直于透镜中心轴的反射表面，第一反射镜可移除地设置在光开关另一侧的第一位置。 第二反射镜具有从透镜中心轴线倾斜的反射面，第二反射镜可移除地设置在第一位置。 第一和第二反射镜中的一个被选择性地设置在第一位置。

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。

公开(公告)号：US6046813A

公开(公告)日：2000-04-04

申请号：US244039

申请日：1999-02-04

申请人： Norihisa Naganuma

发明人： Norihisa Naganuma

IPC分类号： G01J9/02 ,  G01J9/00 ,  G02B6/34 ,  H04B10/079 ,  H04B10/2507 ,  H04B10/293 ,  H04B10/564 ,  H04B10/572 ,  H04J14/00 ,  H04J14/02 ,  G01J3/15

CPC分类号： G02B6/4215 ,  G01J9/00 ,  G02B6/29361 ,  G02B6/2848 ,  G02B6/29307 ,  G02B6/2937 ,  G02B6/29389 ,  H04J14/02

摘要： A wavelength detecting device is used for a wavelength multiplexing optical communication system, is simple and inexpensive, and can strictly control the wavelengths of signal beams that are close to one another. The device has a path splitter and a wavelength selector. The path splitter splits a beam into at least three beams having different path angles. The wavelength selector filters the split beams into beams having predetermined wavelengths. One of the filtered beams is provided as a signal beam and the other beams are provided as monitor beams used to detect the wavelength of the signal beam.

摘要翻译： 波长检测装置用于波长复用光通信系统，简单且便宜，可以严格控制彼此靠近的信号光束的波长。 该设备具有路径分离器和波长选择器。 路径分路器将梁分割成具有不同路径角度的至少三个梁。 波长选择器将分束束滤波成具有预定波长的波束。 被滤波的光束中的一个被提供为信号光束，而另一个光束被提供为用于检测信号光束的波长的监视器光束。

公开(公告)号：US5739951A

公开(公告)日：1998-04-14

申请号：US818033

申请日：1997-03-14

申请人： Norihisa Naganuma

发明人： Norihisa Naganuma

IPC分类号： G02B5/30 ,  G02B6/26 ,  G02B27/28

CPC分类号： G02B6/2746 ,  G02B1/10 ,  G02B27/283 ,  G02B5/3083

摘要： A polarization independent optical device capable of eliminating the apparent polarization dependence of a dielectric multi-layer film and permitting the design of an optical path at an optional angle of incidence of light beam. The polarization independent optical device comprises a tapered double-refractive crystal disposed so that an optic axis thereof is perpendicular to an incident optical path, and a dielectric multi-layer film disposed on an exit side of light beam with respect to the tapered double-refractive crystal.

摘要翻译： 一种偏振无关光学器件，其能够消除电介质多层膜的表观偏振依赖性，并允许在光束的任意入射角设计光路。 偏振无关光学器件包括锥形双折射晶体，其设置成其光轴垂直于入射光路，并且介电多层膜相对于锥形双折射率设置在光束的出射侧 水晶。