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51. 发明授权

US5512383A Wavewength converting element and method of manufacturing the same 失效
标题翻译：波长转换元件及其制造方法
公开(公告)号：US5512383A
公开(公告)日：1996-04-30
申请号：US266629
申请日：1994-06-28
申请人： Kiyofumi Chikuma , Atsushi Onoe
发明人： Kiyofumi Chikuma , Atsushi Onoe
IPC分类号： G02B6/13 , G02B6/12 , G02B6/134 , G02F1/37 , G02F1/377 , B32B9/00 , G02B6/00
CPC分类号： G02B6/1345 , G02F1/377 , G02B2006/1204 , G02B2006/12045
摘要： A method of manufacturing a wavelength converting element forms an optical waveguide having a substantially uniform thickness and a desired size. A thin film of lithium niobate is formed on a substrate of lithium tantalate, and a mask corresponding to an optical waveguide is formed on the thin film. A proton exchange is performed on a predetermined area of the thin film through the mask. A potassium ion exchange is further performed on the proton-exchanged area, thus yielding the optical waveguide. The mode of light that propagates in the optical waveguide can be set to a low-order mode, so that the efficiency of converting the incident light to the second harmonic is improved.
摘要翻译：制造波长转换元件的方法形成具有基本均匀厚度和期望尺寸的光波导。在钽酸锂的基板上形成铌酸锂薄膜，在薄膜上形成与光波导对应的掩模。通过掩模在薄膜的预定区域上进行质子交换。在质子交换区进一步进行钾离子交换，从而产生光波导。可以将在光波导中传播的光的模式设定为低阶模式，从而提高将入射光转换为二次谐波的效率。

52. 发明授权

US5283777A Three-dimensional optical recording medium and optical information recording apparatus using the same 失效
标题翻译：三维光学记录介质和使用其的光学信息记录装置
公开(公告)号：US5283777A
公开(公告)日：1994-02-01
申请号：US800133
申请日：1991-11-29
申请人： Naohiro Tanno , Teruo Toma , Kiyofumi Chikuma
发明人： Naohiro Tanno , Teruo Toma , Kiyofumi Chikuma
IPC分类号： G11B7/00 , G11B7/0045 , G11B7/135 , G11B7/24
CPC分类号： G11B7/00455 , G11B7/24 , G03H1/0248 , G03H2001/026 , G03H2222/33 , G03H2223/26 , G03H2250/42 , G03H2270/54
摘要： A three-dimensional optical recording medium is made of a photo-induced refractive index-changing material or two-photons absorbing material, which is based on photo-dissociation or photopolymerization. An optical information recording apparatus comprises a device for loading a three dimensional recording medium; a device for generating a high coherent optical pulse or a train of partially-coherent optical waves; a device for splitting the optical pulse into two pulse components and causing the two pulse components to propagate in the recording medium from opposite directions to meet at a predetermined three-dimensional position; a device for converging a light beam in the recording medium into a parallel beam; and a device for discretely scanning the meeting position of the pulse components to ensure three-dimensional recording in accordance with information to be recorded. Optical pulses or a train of optical waves are permitted to meet at a predetermined three-dimensional position in such a three-dimensional recording medium whose refractive index changes according to light intensity, thus ensuring three-dimensionally information recording as a discrete distribution of refractive indices at high density.
摘要翻译：三维光学记录介质由基于光解离或光聚合的光致折射率变换材料或双光子吸收材料制成。光信息记录装置包括用于装载三维记录介质的装置; 用于产生高相干光脉冲或部分相干光波的装置; 用于将光脉冲分成两个脉冲分量并使两个脉冲分量从相反方向在记录介质中传播以在预定三维位置相遇的装置; 用于将记录介质中的光束会聚成平行光束的装置; 以及用于离散地扫描脉冲分量的会议位置以确保根据要记录的信息的三维记录的装置。允许光脉冲或一串光波在其折射率根据光强度变化的三维记录介质中的预定三维位置相遇，从而确保作为折射率的离散分布的三维信息记录高密度。

53. 发明授权

US5191591A Laser wavelength converter 失效
标题翻译：激光波长转换器
公开(公告)号：US5191591A
公开(公告)日：1993-03-02
申请号：US729349
申请日：1991-07-12
申请人： Sota Okamoto , Kiyofumi Chikuma
发明人： Sota Okamoto , Kiyofumi Chikuma
IPC分类号： G02B6/00 , G02B5/00 , G02F1/37 , G02F1/383 , H01S3/108
CPC分类号： G02B5/001 , G02F1/383 , G02F2001/372
摘要： A stable wavelength converting apparatus comprising an axicon having a convex conical surface on that side where a second harmonics enters and a concave conical surface on the light-leaving side. This design feature can reduce the deviation of the collimation by the axicon.

54. 发明授权

US5173962A Optical wavelength conversion device with high alignment accuracy 失效
标题翻译：具有高对准精度的光波长转换装置
公开(公告)号：US5173962A
公开(公告)日：1992-12-22
申请号：US790526
申请日：1991-11-12
申请人： Sota Okamoto , Kiyofumi Chikuma
发明人： Sota Okamoto , Kiyofumi Chikuma
IPC分类号： G02B6/32 , G02B6/42 , G02B27/09 , G02F1/35 , G02F1/377 , H01S5/00
CPC分类号： G02B6/4214 , G02F1/377
摘要： The optical wavelength conversion device according to the present invention comprises a light source for emitting a fundamental wave, a waveguide type optical wavelength conversion element having an optical coupler to receive said fundamental wave and an optical waveguide made of non-linear optical material for converting the fundamental wave to a secondary harmonic, and a light-focused optical system having an objective lens for converging the fundamental wave to the optical coupler, wherein the light-focused optical system includes an optical tilting means for tilting the optical axis of the fundamental wave with respect to the optical axis of the objective lens. The wavelength conversion device having a simple arrangement of an optical system can guide the fundamental wave to the wavelength conversion element at a high accuracy.
摘要翻译：根据本发明的光波长转换装置包括用于发射基波的光源，具有用于接收所述基波的光耦合器的波导型光波长转换元件和由非线性光学材料制成的光波导，用于将具有用于将基波会聚到光耦合器的物镜的光聚焦光学系统，其中，所述光聚焦光学系统包括用于使基波的光轴倾斜的光学倾斜装置，相对于物镜的光轴。具有光学系统的简单布置的波长转换装置可以高精度地将基波引导到波长转换元件。

55. 发明授权

US5138686A Fiber type wavelength converter 失效
标题翻译：光纤类型波长转换器
公开(公告)号：US5138686A
公开(公告)日：1992-08-11
申请号：US667638
申请日：1991-03-11
申请人： Kiyofumi Chikuma , Sota Okamoto
发明人： Kiyofumi Chikuma , Sota Okamoto
IPC分类号： G02F1/37 , G02F1/383
CPC分类号： G02F1/383
摘要： A fiber type optical wavelength converter comprising a core, and a clad. The core is made of nonlinear optical crystal that converts the primary light or straight polarization of a frequency of .omega., which enters and propagates in the direction of the center axis of the core, into a second harmonics having a vibrating surface normal to a vibrating surface of the primary light and having a frequency of 2.omega.. The nonlinear optical crystal also satisfies n.sup..omega. .gtoreq.n.sup.2.omega. where n.sup..omega. is a refractive index to the primary light and n.sup.2.omega. is a refractive index to the second harmonics.
摘要翻译：一种光纤型光波长转换器，包括芯和包层。芯由非线性光学晶体制成，其将以芯的中心轴方向进入和传播的ω的频率的初级光或直线偏振转换成具有与振动表面垂直的振动表面的二次谐波的原始光，并具有2ω的频率。非线性光学晶体还满足nω=n2ω，其中nω是与初级光的折射率，而n2ω是相对于二次谐波的折射率。

56. 发明授权

US5119384A Optical wavelength converter and method of manufacturing the same 失效
标题翻译：光波长转换器及其制造方法
公开(公告)号：US5119384A
公开(公告)日：1992-06-02
申请号：US699582
申请日：1991-05-14
申请人： Kiyofumi Chikuma
发明人： Kiyofumi Chikuma
IPC分类号： G02F1/37 , G02F1/065 , G02F1/377 , G02F1/383
CPC分类号： G02F1/065 , G02F1/377 , G02F1/383 , G02F2001/374
摘要： An optical wavelength converter comprises a waveguide passage made of nonlinear optical crystal, and a substrate provided in contact with the waveguide passage, all dielectric main axes of the nonlinear optical crystal being inclined with respect to an extending direction of the waveguide passage. According to a method of manufacturing an optical wavelength converter, a fluid consisting of an organic nonlinear optical crystal material introduced in a bending groove in a substrate is crystallized in order starting from the side of one portion of the bending groove to thereby form an organic nonlinear optical crystal in the other portion of the groove, which has the crystal axis and dielectric main axis both inclined with respect to the extending direction of the other groove portion.

57. 发明授权

US07315506B2 Information recording medium, information recording apparatus, information recording method, information playback apparatus, information playback method, recording program recording medium, and playback program recording medium 失效
标题翻译：信息记录介质，信息记录装置，信息记录方法，信息重放装置，信息重放方法，记录程序记录介质和重放程序记录介质
公开(公告)号：US07315506B2
公开(公告)日：2008-01-01
申请号：US10901303
申请日：2004-07-29
申请人： Kiyofumi Chikuma
发明人： Kiyofumi Chikuma
IPC分类号： G11B7/00
CPC分类号： G11B7/24065 , G11B7/0045 , G11B7/00455 , G11B7/005 , G11B7/0052
摘要： An optical disk from which information is played back when the optical disk is irradiated with a playback light beam which does not pass through a photochromic layer before its transparency is changed by irradiation with a recording light beam, but passes through the photochromic layer after its transparency is changed, including: the photochromic layer which is initialized with initialization light and also maintains a change in its transparency caused by irradiation with a recording light beam after end of the irradiation; and a fluorescent layer for emitting, as detection light, light of a frequency different from the frequency of the playback light beam when the fluorescent layer is irradiated with the playback light beam, wherein the photochromic layer and the fluorescent layer are formed in order in the direction in which the recording light beam and the playback light beam are irradiated.
摘要翻译：当光盘在通过照射记录光束而改变其透明度之前不通过光致变色层的重放光束照射光盘时，再通过光致变色层再透过信息的光盘包括：用初始化光初始化的光致变色层，并且在照射结束后也保持由记录光束照射引起的透明度的变化; 以及荧光层，用于当荧光层被重放光束照射时，作为检测光发射与重放光束的频率不同的频率的光，其中光致变色层和荧光层在记录光束和回放光束照射的方向。

58. 发明授权

US06795466B1 Distributed feedback type semiconductor laser device 失效
标题翻译：分布式反馈型半导体激光器件
公开(公告)号：US06795466B1
公开(公告)日：2004-09-21
申请号：US09482099
申请日：2000-01-13
申请人： Kiyoshi Takei , Nong Chen , Yoshiaki Watanabe , Kiyofumi Chikuma
发明人： Kiyoshi Takei , Nong Chen , Yoshiaki Watanabe , Kiyofumi Chikuma
IPC分类号： H01S500
CPC分类号： H01S5/1231 , H01S5/0202 , H01S5/0421 , H01S5/0425 , H01S5/0655 , H01S5/2004 , H01S5/22 , H01S5/3202 , H01S5/3235
摘要： A DFB type semiconductor laser device including a laser substrate, a grating layer, an insulating layer and an electrode layer, which are laminated in the given order. The insulating layer includes a through groove or grooves extending to the grating layer in a direction in which a resonator of the laser device is formed, and the electrode layer contacts the grating layer and a clad layer.
摘要翻译：一种DFB型半导体激光器件，其包括以给定顺序层叠的激光器基板，光栅层，绝缘层和电极层。绝缘层包括在形成激光器件的谐振器的方向上延伸到光栅层的沟槽或沟槽，并且电极层接触光栅层和覆盖层。

59. 发明授权

US06515311B1 Gallium nitride based semiconductor light emitting device 失效
标题翻译：基于氮化镓的半导体发光器件
公开(公告)号：US06515311B1
公开(公告)日：2003-02-04
申请号：US09576859
申请日：2000-05-22
申请人： Mitsuru Nishitsuka , Kiyofumi Chikuma
发明人： Mitsuru Nishitsuka , Kiyofumi Chikuma
IPC分类号： H01L3300
CPC分类号： H01S5/32341 , H01S5/2004 , H01S5/2231
摘要： A GaN based semiconductor laser device which can prevent guided mode light emitted from the active layer from leaking through the cladding layer to the underlying layer without making the cladding layer excessively thick is provided. The device is characterized in that if an n-type cladding layer, a waveguide layer and a p-type cladding layer are collectively defined as a first three-layer waveguide path and a substrate, an underlying layer and an n-type cladding layer are collectively defined as a second three-layer waveguide path, then effective refractive indices of light propagating through the first and second three-layer waveguide paths are set different from each other.
摘要翻译：提供了一种能够防止从有源层发射的引导模式的光透过包覆层泄漏到下层而不使覆层过厚的GaN基半导体激光器件。该装置的特征在于，如果将n型包覆层，波导层和p型包覆层共同定义为第一三层波导路径和基板，则下层和n型包覆层为共同定义为第二三层波导路径，则传播通过第一和第二三层波导路径的光的有效折射率被设定为彼此不同。

60. 发明授权

US06381258B1 Ridge-structure DFB semiconductor laser and method of manufacturing the same 失效
公开(公告)号：US06381258B1
公开(公告)日：2002-04-30
申请号：US09481940
申请日：2000-01-13
申请人： Kiyoshi Takei , Nong Chen , Yoshiaki Watanabe , Kiyofumi Chikuma
发明人： Kiyoshi Takei , Nong Chen , Yoshiaki Watanabe , Kiyofumi Chikuma
IPC分类号： H01S308
CPC分类号： B82Y20/00 , H01S5/0425 , H01S5/12 , H01S5/1228 , H01S5/22 , H01S5/34373
摘要： A description is provided of a ridge-structure DFB semiconductor laser and a method of manufacturing the laser wherein an optical absorption loss by a metal electrode formed on a grating can be avoided. The DFB semiconductor laser includes: a ridge protruding from flat portions of a cladding layer which is formed on an active layer, the ridge includes a cladding layer and a contact layer sequentially formed on the active layer; a plurality of metal strips having a predetermined periodicity along a longitudinal direction of the ridge and extending from a surface of at least one of the flat portions to a top of the ridge; and an insulating layer formed on the plurality of metal strips at the top of the ridge.

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