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1.发明公开Optical device with photonic crystal and associated method 有权Optische Vorrichtung mit photonischem Kristall undzugehörigesVerfahren
公开(公告)号：EP1293809A2
公开(公告)日：2003-03-19
申请号：EP02020830.2
申请日：2002-09-17
发明人： Hamada, Hidenobu
IPC分类号： G02B6/12
CPC分类号： B82Y20/00 , G02B6/12007 , G02B6/1225 , G02B6/13 , G02B6/30 , G02B2006/12164 , G02B2006/12176
摘要： An optical device includes: a complex photonic crystal in which a plurality of materials with different refractive indices are placed periodically, whereby a plurality of photonic crystals 6c 1 to 6C n with a periodic refractive index distribution are arranged in a column in a direction of a common primitive lattice vector; ingoing optical waveguides 1c and 2c 1 to 2c n for allowing light to be incident upon the complex photonic crystal; and an outgoing optical waveguide 3c for receiving light output from the complex photonic crystal.
摘要翻译： 光学装置包括：复数光子晶体，其中多个具有不同折射率的材料周期性地放置，由此具有周期性折射率分布的多个光子晶体6c 1至6C n沿着 共同原始晶格矢量 导入光波导1c和2c 1至2c n以允许光入射到复数光子晶体上; 以及用于接收从复数光子晶体输出的光的输出光波导3c。
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公开(公告)号：EP0696739B1
公开(公告)日：2002-11-20
申请号：EP95112609.3
申请日：1995-08-10
发明人： Hamada, Hidenobu
IPC分类号： G01R15/24
CPC分类号： G01R15/247
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公开(公告)号：EP1168008A2
公开(公告)日：2002-01-02
申请号：EP01113654.6
申请日：2001-06-19
发明人： Hamada, Hidenobu
IPC分类号： G02B6/16
CPC分类号： G02B6/02309 , B82Y20/00 , C03B2203/42 , G02B6/02338 , G02B6/0239 , G02F1/0955 , G02F2202/32 , Y02P40/57
摘要： An optical device includes, in a predetermined section of an optical fiber (1), a first functional part (7) having a plurality of Faraday crystal columns (5) that are parallel to each other and almost penetrating perpendicularly to an optical axis (2) of an optical fiber (1) through a core thereof, and a second functional part (8) having a plurality of holes (6) that are parallel to each other and almost penetrating perpendicularly to the optical axis (2) of the optical fiber (1) through the core thereof. A longitudinal direction of the Faraday crystal columns (5) and a longitudinal direction of the holes (6) form an angle of 45 degrees along a plane perpendicular to the optical axis (2). Thus, the optical device can be realized only by processing the optical fiber.
An aspect of the present invention is directed to a method of fabricating a photonic crystal. The method includes the step of forming the photonic crystal by making, in a predetermined section along an optical axis of an optical fiber composed of a core through which light propagate and a clad surrounding the core, a plurality of columns penetrate through the core.摘要翻译： 光学装置在光纤（1）的预定部分中包括具有彼此平行且几乎垂直于光轴（2）的多个法拉第晶体柱（5）的第一功能部件（7） ）和具有多个孔（6）的第二功能部件（8），所述第二功能部件（8）彼此平行且几乎垂直于所述光纤的光轴（2）穿透 （1）通过其核心。 法拉第晶体柱（5）的纵向方向和孔（6）的纵向方向沿垂直于光轴（2）的平面形成45度的角度。 因此，只能通过处理光纤来实现光学装置。 本发明的一个方面涉及一种制造光子晶体的方法。 该方法包括通过沿着由光传播的芯和围绕芯的包层构成的光纤的光轴在预定的部分中形成多个柱，该多个柱穿过芯。
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4.发明公开Polarization state detector and current sensor using it 失效Polarisationszustands-Detektor und ihn verwendender Stromsensor。
公开(公告)号：EP0598356A3
公开(公告)日：1995-03-08
申请号：EP93118355.2
申请日：1993-11-12
发明人： Hamada, Hidenobu
IPC分类号： G01R15/07 , G01R33/032
CPC分类号： G01R15/246 , G01R33/0322
摘要： The objective of the present invention is to provide a current sensor that does not depend on the frequency of a current to be measured. A current sensor of the present invention is composed by arranging along the optic axis, successively from the side of incident light, a first polarizer (17), a Faraday cell for detection (18), a Faraday cell for modulation (1), and a second polarizer (2). A magnetic field proportional to a current to be measured is impressed on the Faraday cell for detection (18), and a periodic magnetic field for modulation that varies the angle of Faraday rotation by nπ radians, where n is a positive integer, during each period and that has a frequency higher than the magnetic field impressed on the Faraday cell for detection is impressed on the Faraday cell for modulation (17), and the current to be measured is determined based on a phase change in the intensity of the light emitted from the second polarizer of said polarization state detector. A current to be measured is determined accurately from DC to high frequency without being influenced by the external environment.
摘要翻译： 本发明的目的是提供一种不依赖于待测电流的频率的电流传感器。 本发明的电流传感器通过从入射光侧依次沿着光轴布置，第一偏振器，用于检测的法拉第单元，用于调制的法拉第单元和第二偏振器构成。 与要测量的电流成比例的磁场施加在法拉第电池上用于检测，以及用于调制的周期磁场，其在每个周期期间改变法拉第旋转的角度n pi弧度，其中n是正整数，并且 具有高于施加在法拉第电池上的用于检测的磁场的频率被施加在法拉第电池上用于调制，并且待测量的电流基于从所述第二偏振器发射的光的强度的相位变化来确定 极化状态检测器。 要测量的电流从DC到高频准确地确定，而不受外部环境的影响。
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公开(公告)号：EP1394579B1
公开(公告)日：2008-01-16
申请号：EP03019006.0
申请日：2003-08-21
发明人： Hamada, Hidenobu
IPC分类号： G02B6/124
CPC分类号： G02B6/12002 , B82Y20/00 , G02B6/1225 , G02B6/13 , G02B6/132 , G02B6/136 , G02B6/4214
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6.发明公开Optical demultiplexer, optical multi-/demultiplexer, and optical device 审中-公开Optischer解复用器，Optischer多路复用器/解复用器，并且选择Vorrichtung
公开(公告)号：EP1426799A3
公开(公告)日：2005-05-18
申请号：EP03026396.6
申请日：2003-11-18
发明人： Hamada, Hidenobu
CPC分类号： G02B6/2938 , G02B6/12007 , G02B6/2813 , G02B2006/12164 , G02F1/313 , G02F2001/217 , G02F2203/055
摘要： The present invention provides an optical demultiplexer and an optical multi-/demultiplexer at low cost without reducing performance capabilities. An optical demultiplexer (100a) includes: a multi-mode waveguide (102a) having such an optical path length as to cause a difference between first and second wavelengths with respect to a phase difference between zero- and first-order modes to become an integral multiple of π; an input waveguide (105a) optically connected to the input side of the multi-mode waveguide (102a) such that the optical axis thereof is offset from the center line of the multi-mode waveguide (102a); and two output waveguides (103a and 104a) optically coupled to the multi-mode waveguide (102a) at different positions of the output side of the multi-mode waveguide (102a). The two output waveguides (103a and 104a) are located in such a manner as to maximize the extinction ratio.
摘要翻译： 本发明以低成本提供光解复用器和光多路复用器，而不降低性能。 光解复用器（100a）包括：多模波导（102a），其具有相对于零阶和一阶模之间的相位差使第一和第二波长之间的差异的光程长度成为积分 pi的倍数 光学连接到多模波导（102a）的输入侧的输入波导（105a），使得其光轴偏离多模波导（102a）的中心线; 以及在多模波导（102a）的输出侧的不同位置处光耦合到多模波导（102a）的两个输出波导（103a和104a）。 两个输出波导（103a和104a）以最大化消光比的方式定位。
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公开(公告)号：EP1394579A3
公开(公告)日：2005-03-23
申请号：EP03019006.0
申请日：2003-08-21
发明人： Hamada, Hidenobu
IPC分类号： G02B6/124
CPC分类号： G02B6/12002 , B82Y20/00 , G02B6/1225 , G02B6/13 , G02B6/132 , G02B6/136 , G02B6/4214
摘要： A slab-type photonic crystal arranged to reduce the coupling loss in coupling to an optical fiber and to satisfy single-mode conditions. The photonic crystal has a slab having a plurality of slab refractive index portions and vacancies formed between the slab refractive index portions. The number, shape, size and refractive index of the slab refractive index portions and the number and shape of the vacancies are selected so that when a beam of light entering the waveguide expands to a maximum extent, the size of the beam in the slab thickness direction does not exceed the slab thickness.
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公开(公告)号：EP1231488A2
公开(公告)日：2002-08-14
申请号：EP02002026.9
申请日：2002-02-07
发明人： Hamada, Hidenobu
CPC分类号： G02F1/093 , B82Y20/00 , G02B6/12007 , G02B6/1225 , G02B6/126 , G02B2006/12157 , G02F2202/32 , G02F2203/06
摘要： The invention provides a small optical device with which incident light can be demultiplexed. The optical device includes a demultiplexing portion (4) (first optical member) separating TE waves and TM waves of incident light of a wavelength λ and an optical fiber (1) (optical input portion) inputting incident light into the demultiplexing portion (4). The demultiplexing portion (4) has a periodically changing refractive index. The angle defined by the first reciprocal lattice vector α 1 and the second reciprocal lattice vector α 2 of the demultiplexing portion (4) at the wavelength λ is not greater than 90°. In the direction of the first reciprocal lattice vector α 1 the wave number of the TE wave is larger than the wave number of the TM wave. In the direction of the second reciprocal lattice vector α 2 the wave number of the TE wave is smaller than the wave number of the TM wave. The optical fiber (1) inputs the incident light in a direction that is parallel to a plane including the first reciprocal lattice vector α 1 and the second reciprocal lattice vector α 2 . The device can also be used in a wavelength interleaver or a polarisation-dependent or polarisation-independent optical isolator.
摘要翻译： 本发明提供了一种能够将入射光解复用的小型光学装置。 该光学装置包括分离波长λ的入射光的TE波和TM波的解复用部（4）（第一光学部件）和将入射光输入到解复用部（4）的光纤（1）（光学输入部） 。 解复用部分（4）具有周期性变化的折射率。 由波长λ处的解复用部分（4）的第一倒易晶格矢量α1和第二倒易晶格矢量α2限定的角度不大于90°。 在第一倒易晶格矢量α1的方向上，TE波的波数大于TM波的波数。 在第二倒易晶格矢量α2的方向上，TE波的波数小于TM波的波数。 光纤（1）在与包含第一往复格子矢量α1和第二往复格子矢量α2的平面平行的方向上输入入射光。 该器件还可用于波长交织器或偏振相关或偏振无关光学隔离器。
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公开(公告)号：EP0599181A2
公开(公告)日：1994-06-01
申请号：EP93118477.4
申请日：1993-11-16
发明人： Hamada, Hidenobu
IPC分类号： G01R15/07
CPC分类号： G01R15/242
摘要： A voltage sensor is composed by arranging along the optic axis, successively from the side of incident light, a first polarizer (1), a Pockels cell for detection (2), a Pockels cell for modulation (3), and a second polarizer (4) wherein an electric field proportional to a voltage to be measured is applied to the Pockels cell for detection (2), and a periodic electric field for modulation that varies the phase difference by 2nπ radians, where n is a positive integer, during each period and that has a frequency higher than the electric field applied to the Pockels cell for detection is applied to the Pockels cell for modulation (3), and the voltage to be measured is determined based on a phase change in the intensity of the light output from the second polarizer.
摘要翻译： 电压传感器由入射光侧依次沿光轴布置，第一偏振器，用于检测的普克尔斯单元，用于调制的普克尔斯单元和第二偏振器组成，其中与电压成比例的电场 测量应用于普克尔斯单元进行检测，以及用于调制的周期性电场，其在每个周期期间将相位差改变2n pi个弧度，其中n是正整数，并且具有高于施加到 用于检测的普克尔斯单元被应用于普克尔斯单元进行调制，并且基于从第二偏振器输出的光的强度的相位变化来确定要测量的电压。
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公开(公告)号：EP1248124A3
公开(公告)日：2004-11-03
申请号：EP02007670.9
申请日：2002-04-04
发明人： Hamada, Hidenobu
IPC分类号： C30B33/00 , G02B6/12 , G02B6/124 , G02B6/28 , G02B6/125 , G02B6/136 , G02B6/138 , G02B6/293 , G02B6/42 , C30B29/00
CPC分类号： G02B6/1225 , B82Y20/00 , C30B5/00 , C30B29/60
摘要： An optical device of the present invention includes a photonic crystal (4) having a two-dimensional or three-dimensional lattice structure in which a plurality of materials with different refractive indexes are arranged periodically, wherein a two-dimensional lattice structure composed of a group of primitive lattice vectors has a lattice structure having no rotation axis with more than 3-fold. The optical device shown as an example is an optical separator. In this optical separator, an ingoing side optical fiber (1) is disposed so as to be coupled to one side of a composite photonic crystal (4), and outgoing optical fibers (2,3) are disposed so as to be coupled to the other side of the composite photonic crystal (4). The composite photonic crystal (4) has a structure in which two kinds of photonic crystals (5,6) are bonded to each other with a bonding surface (7). The photonic crystals (5,6) have a two-dimensional structure in which columnar materials (10) are disposed periodically in a first material (9).
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