公开(公告)号：US5905827A

公开(公告)日：1999-05-18

申请号：US801808

申请日：1997-02-14

申请人： Norihisa Naganuma ,  Teruhiro Kubo ,  Nobuhiro Fukushima

发明人： Norihisa Naganuma ,  Teruhiro Kubo ,  Nobuhiro Fukushima

IPC分类号： G02B6/293 ,  G02B6/34 ,  G02B6/32

CPC分类号： G02B6/2938 ,  G02B6/29365

摘要： A wavelength division multiplexing module capable of multiplexing or demultiplexing a plurality of optical signals having close wavelengths with less crosstalk. The wavelength division multiplexing module includes a housing having a bottom wall, a first side wall, and a second side wall inclined a predetermined angle with respect to the first side wall, and a common port assembly fixed to the bottom wall of the housing so as to emit a collimated beam substantially perpendicular to the first side wall. One or more filter port assemblies are fixed to the first side wall in the condition that the pass wavelength characteristic and optical axis of each assembly have been adjusted. Similarly, one or more filter port assemblies are fixed to the second side wall in the condition that the pass wavelength characteristic and optical axis of each assembly have been adjusted. Each filter port assembly includes an optical film holder rotatable in a hole having a center axis inclined a predetermined angle .theta.1 with respect to the optical axis, and a band-pass filter mounted in the optical film holder so as to be inclined a predetermined angle .theta.2 with respect to a plane normal to the center axis of the hole of the optical film holder.

摘要翻译： 一种波分复用模块，其能够对具有较小串扰的近波长的多个光信号进行多路复用或解复用。 波分复用模块包括具有底壁，第一侧壁和相对于第一侧壁倾斜预定角度的第二侧壁的壳体，以及固定到壳体底壁的公共端口组件，以便 以发射基本上垂直于第一侧壁的准直光束。 在每个组件的通过波长特性和光轴被调整的条件下，一个或多个过滤器端口组件固定到第一侧壁。 类似地，在调整每个组件的通过波长特性和光轴的条件下，一个或多个过滤器端口组件固定到第二侧壁。 每个过滤器端口组件包括光学膜保持器，其可旋转在具有相对于光轴倾斜预定角度θ1的中心轴的孔中;以及带通滤光器，其安装在光学膜保持器中以倾斜预定角度 θ2相对于垂直于光学保持器的孔的中心轴的平面。

公开(公告)号：US5812707A

公开(公告)日：1998-09-22

申请号：US797204

申请日：1997-02-11

申请人： Takashi Yamane ,  Nobuhiro Fukushima ,  Shinya Sawae

发明人： Takashi Yamane ,  Nobuhiro Fukushima ,  Shinya Sawae

IPC分类号： G02B6/126 ,  G02B6/30 ,  G02B6/42 ,  G02B7/00 ,  G02B6/00

CPC分类号： G02B7/00 ,  G02B6/30 ,  G02B6/4213 ,  G02B6/4244

摘要： An apparatus, such as an optical modulator, which includes an optical waveguide and a polarizer housing device. The optical waveguide has an input end to receive light, and the polarizer housing device is connected to the input end of the optical waveguide. The polarizer housing device includes a polarizer which polarizes light, and a lens. A propagation space is in the polarizer housing device between the polarizer and the lens. The light polarized by the polarizer travels through the propagation space to the lens and is guided by the lens to the input end of the optical waveguide. The polarizer is bonded to the polarizer housing device with an adhesive so that no excess adhesive flows into the propagation space. Therefore, it is not necessary to use an optical adhesive to bond the polarizer to the polarizer housing device.

摘要翻译： 一种诸如光调制器的装置，其包括光波导和偏振器容纳装置。 光波导具有用于接收光的输入端，并且偏振器容纳装置连接到光波导的输入端。 偏振器壳体装置包括使光偏振的偏振器和透镜。 传播空间位于偏振器与透镜之间的偏振器壳体中。 由偏振器偏振的光通过传播空间传播到透镜，并被透镜引导到光波导的输入端。 偏振器用粘合剂粘合到偏振器壳体装置，使得没有多余的粘合剂流入传播空间。 因此，不需要使用光学粘合剂将偏振器粘合到偏振器容纳装置。

公开(公告)号：US5798865A

公开(公告)日：1998-08-25

申请号：US831341

申请日：1997-03-31

申请人： Hiroaki Matsuda ,  Hideki Noda ,  Nobuhiro Fukushima

发明人： Hiroaki Matsuda ,  Hideki Noda ,  Nobuhiro Fukushima

IPC分类号： G02B5/08 ,  G02B1/10 ,  G02B5/28 ,  G02B27/10 ,  G02B27/14 ,  G02B27/28

CPC分类号： G02B27/142 ,  G02B1/10 ,  G02B27/283

摘要： A beam splitter formed by laminating a plurality of optical films on a glass substrate having a refractive index of 1.51.+-.0.10. The optical films are first, second, third, fourth, and fifth layers laminated in this order from the glass substrate. The first layer has a refractive index of 1.44.+-.0.10 and an optical film thickness of 0.05-0.15; the second layer has a refractive index of 1.68.+-.0.10 and an optical film thickness of 0.01-0.10; the third layer has a refractive index of 1.44.+-.0.10 and an optical film thickness of 0.50-0.60; the fourth layer has a refractive index of 2.23.+-.0.10 and an optical film thickness of 0.25-0.35; and the fifth layer has a refractive index of 1.44.+-.0.10 and an optical film thickness of 0.25-0.35. The optical film thickness means a relative value represented by n.times.d/.lambda. where n denotes a refractive index; d denotes an actual film thickness, and .lambda. denotes a wavelength deciding the center of a wavelength band. The beam splitter can reduce the polarization dependency of a branching ratio with a beam incident angle of 22.5.degree..

公开(公告)号：US5781347A

公开(公告)日：1998-07-14

申请号：US699041

申请日：1996-08-19

申请人： Nobuhiro Fukushima

发明人： Nobuhiro Fukushima

IPC分类号： G02B6/32 ,  G02B6/28 ,  G02B6/42 ,  G02B6/26

CPC分类号： G02B6/2817 ,  G02B6/2848 ,  G02B6/4244 ,  G02B6/4246 ,  G02B6/4286

摘要： An optical device including a lens located between a first port and a second port, and a photodetector having a photodetecting surface located in the vicinity of the second port. The first port and the second port have a first aperture and a second aperture, respectively. The lens has a converging portion for converting a light beam so as to couple the first aperture and the second aperture, and a deflecting portion for deflecting a part of a light beam from the first port to make the part incident on the photodetecting surface. The converging portion and the deflecting portion are integral with each other, for example. By using this optical device, light power can be monitored stably with no polarization dependence.

摘要翻译： 一种光学装置，包括位于第一端口和第二端口之间的透镜以及具有位于第二端口附近的光电检测面的光电检测器。 第一端口和第二端口分别具有第一孔径和第二孔径。 透镜具有用于转换光束以便耦合第一孔径和第二孔眼的会聚部分，以及用于偏转来自第一端口的光束的一部分以使部件入射在光电检测表面上的偏转部分。 会聚部分和偏转部分例如彼此成一体。 通过使用该光学装置，可以稳定地监视光功率，而不会偏振依赖。

公开(公告)号：US5402509A

公开(公告)日：1995-03-28

申请号：US50143

申请日：1993-05-03

申请人： Nobuhiro Fukushima

发明人： Nobuhiro Fukushima

IPC分类号： G02B5/30 ,  G02B6/26 ,  G02B6/42 ,  G02B27/28 ,  G02F1/09 ,  G02B6/32

CPC分类号： G02B6/2746 ,  G02B27/283 ,  G02B5/3083 ,  G02B6/4209 ,  G02F1/093 ,  G02F2203/06

摘要： An optical device which optically connects a first and a second optical fiber with an optical path provided therebetween and has two or more functions including the function of an optical isolator. A beam of parallel rays obtained by having a beam from an excitation end of a first optical fiber collimated by a lens is passed through a double refraction element, a magnetooptic element, and a double refraction element in order of mention and converged by a lens to be introduced to a second optical fiber through its excitation end, while a beam from the second optical fiber is not coupled to the first optical fiber. Meanwhile, a beam from an excitation port is coupled to the first optical fiber. The optical device is suitable for use in an optical amplification system and a two-way optical transmission system.

摘要翻译： PCT No.PCT / JP92 / 01138 Sec。 371日期：1993年5月3日 102（e）日期1993年5月3日PCT提交1992年9月4日PCT公布。 公开号WO93 / 05429 日期1993年3月18日。一种光学连接第一和第二光纤与其间设置的光路的光学装置，具有包括光隔离器功能的两个或多个功能。 通过使来自由透镜准直的第一光纤的激发端的光束获得的平行光束通过双折射元件，磁光元件和双折射元件，依次由透镜提供并收敛 通过其激发端引入第二光纤，而来自第二光纤的光束不耦合到第一光纤。 同时，来自激励端口的光束耦合到第一光纤。 光学装置适用于光放大系统和双向光传输系统。

公开(公告)号：US20100284076A1

公开(公告)日：2010-11-11

申请号：US11976076

申请日：2007-10-19

申请人： Kohei Shibata ,  Nobuhiro Fukushima

发明人： Kohei Shibata ,  Nobuhiro Fukushima

IPC分类号： G02B27/28 ,  G02B1/10 ,  G02B26/00

CPC分类号： G02B6/29358 ,  G02B6/29394 ,  G02B6/29395

摘要： A wavelength dispersion compensation device includes an etalon 100 having a slab shape. Reflective films are formed on each side of the etalon 100. The reflective films respectively have predetermined reflectance. Reflectance of one of the reflective films differs according to a light incident angle by using a portion of light within a wavelength range to be used with which a filter characteristic in which transmittance rapidly changes is obtained.

摘要翻译： 波长色散补偿装置包括具有板状的标准具100。 在标准具100的每一侧上形成反射膜。反射膜分别具有预定的反射率。 通过使用透射率快速变化的滤光器特性所使用的波长范围内的光的一部分，可以根据光入射角反射一个反射膜的反射率。

公开(公告)号：US07792436B2

公开(公告)日：2010-09-07

申请号：US11391414

申请日：2006-03-29

申请人： Takeshi Hoshida ,  Nobuhiro Fukushima

发明人： Takeshi Hoshida ,  Nobuhiro Fukushima

IPC分类号： H04B10/06

CPC分类号： H04L27/22 ,  H04B10/60

摘要： A small size and low cost optical receiving apparatus, which can stably demodulate the signal, lights in accordance with the differential M-phase shift keying (DMPSK) system. An optical receiving apparatus comprises a light branching unit for branching the differential M-phase shift keying signal beam into four signal light beams, a delay adjusting unit giving a delay time difference of one symbol between a first signal light beam and a second signal light beam and between a third signal light beam and a fourth signal light beam, a demodulating unit for outputting a least two demodulated light signals through respective interferences between the first signal light beam and the second signal light beam, and between the third signal light beam and the fourth signal light beam on one plane which is not parallel to any signal light beam, and at least two optical detectors for converting at least two light signals into electrical signals.

摘要翻译： 可以稳定地解调信号的小尺寸和低成本的光接收装置根据差分M相移键控（DMPSK）系统点亮。 光接收装置包括用于将差分M相移键控信号光束分支为四个信号光束的光分支单元，延迟调整单元，其给出第一信号光束和第二信号光束之间的一个符号的延迟时间差 并且在第三信号光束和第四信号光束之间，解调单元，用于通过第一信号光束和第二信号光束之间的相应干扰以及第三信号光束和第二信号光束之间的相应干扰输出至少两个解调光信号; 在不平行于任何信号光束的一个平面上的第四信号光束，以及用于将至少两个光信号转换为电信号的至少两个光学检测器。

公开(公告)号：US07330617B2

公开(公告)日：2008-02-12

申请号：US11320973

申请日：2005-12-30

申请人： Hirofumi Aota ,  Kohei Shibata ,  Tamotsu Akashi ,  Shinji Yamashita ,  Tsuyoshi Yamamoto ,  Shinichi Takeuchi ,  Yoshinobu Kubota ,  Nobuhiro Fukushima ,  Hiroyuki Furukawa ,  Toshiya Kishida

发明人： Hirofumi Aota ,  Kohei Shibata ,  Tamotsu Akashi ,  Shinji Yamashita ,  Tsuyoshi Yamamoto ,  Shinichi Takeuchi ,  Yoshinobu Kubota ,  Nobuhiro Fukushima ,  Hiroyuki Furukawa ,  Toshiya Kishida

IPC分类号： G02B6/26

CPC分类号： G02B6/29395 ,  G02B6/2931 ,  G02B6/29313 ,  G02B6/3512 ,  G02B6/4215

摘要： A wavelength selective optical switch of the present invention separates a WDM light emitted from an input port of an input and output optical system, according to wavelengths, by a diffraction grating, and thereafter, condenses the lights of respective wavelengths on MEMS mirrors respectively corresponding to the respective wavelengths, in a mirror array, to reflect them by a condenser optical system, to thereby switch optical paths for the respective lights. The condenser optical system is configured by combining a plurality of lenses whose focal distances are different from each other, and positions in an optical axis direction of the lenses are adjustable by a slide mechanism. Thus, despite an error in the focal distances of the condenser lenses, in a mounting angle of a spectral element or the like, a beam pitch at the condensing positions of the lights of respective wavelengths can be coincident with a mirror pitch in the mirror array.

摘要翻译： 本发明的波长选择性光开关根据波长通过衍射光栅分离从输入和输出光学系统的输入端口发射的WDM光，然后将分别对应于 反射镜阵列中的各个波长通过聚光器光学系统反射，从而切换各个光的光路。 聚光器系统通过组合焦距彼此不同的多个透镜来构成，透镜的光轴方向的位置通过滑动机构来调节。 因此，尽管聚光透镜的焦距存在误差，但是在光谱元件等的安装角度，各波长的光的聚光位置处的光束间距可以与镜阵列中的镜间距一致 。

公开(公告)号：US06753997B2

公开(公告)日：2004-06-22

申请号：US10342302

申请日：2003-01-15

申请人： Seimi Sasaki ,  Nobuhiro Fukushima ,  Satoshi Tachibana

发明人： Seimi Sasaki ,  Nobuhiro Fukushima ,  Satoshi Tachibana

IPC分类号： G02F109

CPC分类号： G02F1/09 ,  G02F2203/48

摘要： A small-sized magnetic field generator which is suitable for mass production and provides better output stability. A plurality of coils are formed on a non-magnetic insulating material by depositing at least one layer of conductive film in a spiral pattern. A hollow is made in the center of each coil, so that a plurality of main magnetic cores are arranged on the insulating substrate, with their ends fit into those hollows. By supplying appropriate electrical signals to drive the coils individually, their combined magnetic field can be controlled to have an arbitrary distribution. This combined magnetic field is applied to a magneto-optical target device held on the insulating material.

摘要翻译： 一种小尺寸磁场发生器，适用于批量生产，提供更好的输出稳定性。 通过以螺旋图案沉积至少一层导电膜，在非磁性绝缘材料上形成多个线圈。 在每个线圈的中心形成有中空部，从而在绝缘基板上配置有多个主磁芯，其端部配合在这些中空部中。 通过提供适当的电信号来单独驱动线圈，它们的组合磁场可被控制成具有任意分布。 该组合磁场被施加到保持在绝缘材料上的磁光目标器件。

公开(公告)号：US06407836B1

公开(公告)日：2002-06-18

申请号：US09106897

申请日：1998-06-30

申请人： Nobuhiro Fukushima

发明人： Nobuhiro Fukushima

IPC分类号： H04J1402

CPC分类号： G02F1/09 ,  G02F2201/16 ,  G02F2203/04 ,  G02F2203/48

摘要： The present invention relates to an optical attenuator comprising first and second attenuator units cascaded on an optical path, and a control circuit connected to the first and second attenuator units. Each of the first and second attenuator units includes a Faraday rotator provided on the optical path. The Faraday rotator generates a Faraday rotation angle given as a function of wavelength. Each of the first and second attenuator units further includes polarizing unit for generating an attenuation determined by the Faraday rotation angle on the optical path. The control circuit, for example, controls the Faraday rotation angle in each of the first and second attenuator units so that a wavelength characteristic of attenuation in the first attenuator unit is substantially canceled by a wavelength characteristic of attenuation in the second attenuator unit. With this configuration, although each Faraday rotator generates a Faraday rotation angle given as a function of wavelength, a wavelength characteristic of total attenuation is substantially flattened by the operation of the control circuit.

摘要翻译： 本发明涉及一种光衰减器，包括在光路上级联的第一和第二衰减器单元，以及连接到第一和第二衰减器单元的控制电路。 第一和第二衰减器单元中的每一个包括设置在光路上的法拉第旋转器。 法拉第旋转器产生作为波长的函数给出的法拉第旋转角度。 第一衰减器单元和第二衰减器单元中的每个还包括用于产生由光路上的法拉第旋转角度确定的衰减的偏振单元。 例如，控制电路控制第一衰减器单元和第二衰减器单元中的每一个中的法拉第旋转角度，使得第一衰减器单元中的衰减的波长特性基本上被第二衰减器单元中的衰减的波长特性抵消。 利用这种配置，虽然每个法拉第旋转器产生作为波长的函数给出的法拉第旋转角，但总的衰减的波长特性通过控制电路的操作基本上变平。