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    • 11. 发明授权
    • Optical device and a making method thereof
    • 光学装置及其制造方法
    • US06650821B1
    • 2003-11-18
    • US09477561
    • 2000-01-04
    • Yasushi KoyanoEisuke SasaokaShigeru TanakaKohei KobayashiMasashi OnishiKenji TamanoTakashi Fujii
    • Yasushi KoyanoEisuke SasaokaShigeru TanakaKohei KobayashiMasashi OnishiKenji TamanoTakashi Fujii
    • G02B600
    • G02B6/4457G02B6/02214G02B6/02261G02B6/02395G02B6/03627Y10T428/2933
    • After a wide-band DCF is wound around a bobbin to form an optical fiber coil 32, the latter is removed from the bobbin and placed into a bundle state (the state where the increase in transmission loss in the wavelength band of 1.55 &mgr;m caused by distortions in winding is reduced by 0.1 dB/km or more) released from distortions in winding. A resin 42 is used as a coil-tidying member so as to secure the optical fiber coil 32 to a storage case 40 at four positions. Both ends of the optical fiber coil 32 are connected to pigtail fibers at fusion-splicing parts 44, respectively. Even when the storage case 40 is closed with a lid after the optical fiber coil 32 is secured to the storage case 40 with the resin 42, there remain interstices within the bundle of the optical fiber coil 32 and a space between the optical fiber coil 32 and the storage case 40. As a result, even when the optical fiber coil 32 in a bundle state is accommodated in the storage case 40, transmission loss and the like would not increase.
    • 在宽带DCF缠绕在线轴上以形成光纤线圈32之后,将其从线轴上取下并放置成捆状态(由1.55μm的波长带的传输损耗的增加引起的状态 绕组失真减少了0.1 dB / km以上)。 树脂42用作线圈整理构件,以将光纤线圈32固定在四个位置处的存储盒40上。 光纤线圈32的两端分别在熔接部分44处连接到尾纤。 即使当光纤线圈32用树脂42固定在存储盒40上之后,当用盖子封闭存储盒40时,在光纤线圈32的束内仍然有空隙,并且光纤线圈32之间的空间 结果,即使束状态的光纤线圈32被容纳在收容箱40中,传输损耗等也不会增加。
    • 12. 发明授权
    • Optical fiber, method of making the same, and optical transmission system including the same
    • 光纤,其制造方法以及包括该光纤的光传输系统
    • US06567597B2
    • 2003-05-20
    • US09899020
    • 2001-07-06
    • Eisuke SasaokaMasashi OnishiKatsuya NagayamaKaoru OkunoKazuya Kuwahara
    • Eisuke SasaokaMasashi OnishiKatsuya NagayamaKaoru OkunoKazuya Kuwahara
    • G02B602
    • G02B6/03644C03B37/0253C03B37/027C03B37/02745C03B37/032C03B2203/19C03B2203/36C03B2205/06G02B6/02247G02B6/02285G02B6/278
    • The present invention provides an optical fiber and the like comprising a structure making it possible to realize optical communications with a higher speed and a larger capacity as compared with conventional optical transmission systems. The optical fiber according to the present invention is an optical fiber in which at least one first portion having a positive chromatic dispersion at a predetermined wavelength within a wavelength band in use and at least one second portion having a negative chromatic dispersion at the predetermined wavelength are arranged adjacent each other along the longitudinal direction thereof. In particular, the optical fiber comprises a polarization coupling structure for inducing coupling between polarization modes of propagating light. This polarization coupling structure randomly causes coupling between polarization modes of the propagating light, whereby polarization mode dispersion decreases at the predetermined wavelength. As a consequence, transmission characteristics are effectively restrained from deteriorating due to polarization mode dispersion. Specifically, the polarization coupling structure is a twist applied to the optical fiber.
    • 本发明提供一种光纤等,其包括与常规光传输系统相比可以实现具有更高速度和更大容量的光通信的结构。 根据本发明的光纤是一种光纤,其中在使用中的波长带内的预定波长具有正色散的至少一个第一部分和在预定波长处具有负色散的至少一个第二部分是 沿着其纵向彼此相邻布置。 特别地,光纤包括用于在传播光的偏振模式之间引起耦合的偏振耦合结构。 该偏振耦合结构随机引起传播光的偏振模式之间的耦合,从而偏振模色散在预定波长处降低。 结果,由于偏振模式色散,传输特性被有效地抑制为劣化。 具体地,偏振耦合结构是施加到光纤上的扭转。
    • 13. 发明授权
    • Dispersion Managed optical fiber transmission-line
    • 色散管理光纤传输线
    • US06377740B1
    • 2002-04-23
    • US09637872
    • 2000-08-15
    • Masashi OnishiEisuke Sasaoka
    • Masashi OnishiEisuke Sasaoka
    • G02B602
    • G02B6/29377H04B10/25253
    • A dispersion-managed optical fiber transmission-line with which the formation of side bands around the optical signal wavelength can be suppressed even when carrying out high-speed signal transmission. An optical fiber transmission-line 1 constitutes one repeater span installed between a transmitter (or repeater) 2 and a receiver (or repeater) 3 and is made up of N sections 41 through 4N in sequence from the transmitter 2 to the receiver 3. The chromatic dispersion at the wavelength 1.55 &mgr;m is positive in the sections 4n where the value of n is odd and is negative in the sections 4n where the value of n is even. The ratio between the maximum value and the minimum value of the average chromatic dispersions Dn of the sections 4n is at least 1.3 and not greater than 10.0.
    • 即使进行高速信号传输,也能够抑制光信号波长周围的边带的形成的色散管理的光纤传输线。 光纤传输线1构成安装在发射机(或中继器)2和接收机(或中继器)3之间的一个中继器阵列,并且由发射机2到接收机3依次由N个部分41至4N组成。 波长1.55μm处的色散在n为奇数的区间4n中为正,在n的值为n的区间4n为负。 区间4n的平均色散Dn的最大值和最小值之间的比例为至少1.3且不大于10.0。
    • 14. 发明授权
    • Optical transmission line including a connected part of optical fibers and connecting method
    • 光传输线包括光纤的连接部分和连接方法
    • US06661954B2
    • 2003-12-09
    • US10061210
    • 2002-02-04
    • Eisuke SasaokaTakemi HasegawaShinji IshikawaMasashi Onishi
    • Eisuke SasaokaTakemi HasegawaShinji IshikawaMasashi Onishi
    • G02B642
    • G02B6/02328G02B6/02333G02B6/02357G02B6/02361G02B6/02366G02B6/02385G02B6/262G02B6/3801
    • Provided are an optical transmission line including a connected part of the optical fibers having different refractive index profiles, wherein at least one of the optical fibers has a hollow region, and a method for connecting such optical fibers, wherein connection loss in a connection of such optical fibers is reduced. In the case of connecting an optical fiber 1, which does not have a hollow region and which consists of a core region 3 and a cladding region 4, and an optical fiber 2, which consists of a hollow core region 5 and a cladding region 6 having a plurality of refractive index variation parts 7 which extend along optical fiber 2, matching oil M is first injected into the connecting end portion of the hollow core region 5 to be connected with the optical fiber 1. The matching oil M is a substance that has a matched refractive index greater than the refractive index of the material which forms the cladding region 6. Subsequently, one end portion of the optical fiber 1 and the connecting end portion of the optical fiber 2, wherein the matching oil M is injected, are inserted into the glass pipe 8, and the optical fiber 1 and the optical fiber 2 are connected.
    • 提供一种光传输线,其包括具有不同折射率分布的光纤的连接部分,其中至少一个光纤具有中空区域,以及连接这种光纤的方法,其中连接这种光纤的连接损耗 光纤减少。 在连接不具有由芯区域3和包层区域4构成的中空区域的光纤1和由中空芯区域5和包层区域6构成的光纤2的情况下 具有沿着光纤2延伸的多个折射率变化部7,首先将匹配油M注入到与光纤1连接的中空芯区域5的连接端部。匹配油M是 具有大于形成包层区域6的材料的折射率的匹配折射率。随后,光纤1的一个端部和光纤2的连接端部(其中注入匹配油M)是 插入玻璃管8中,并且光纤1和光纤2连接。
    • 15. 发明授权
    • Optical fiber transmission-line
    • 光纤传输线
    • US06473550B1
    • 2002-10-29
    • US10126608
    • 2002-04-22
    • Masashi OnishiEisuke Sasaoka
    • Masashi OnishiEisuke Sasaoka
    • G02B602
    • G02B6/29377H04B10/25253
    • A dispersion-managed optical fiber transmission-line with which the formation of side bands around the optical signal wavelength can be suppressed even when carrying out high-speed signal transmission. An optical fiber transmission-line 1 constitutes one repeater span installed between a transmitter (or repeater) 2 and a receiver (or repeater) 3 and is made up of N sections 41 through 4N in sequence from the transmitter 2 to the receiver 3. The chromatic dispersion at the wavelength 1.55 &mgr;m is positive in the sections 4n where the value of n is odd and is negative in the sections 4n where the value of n is even. The ratio between the maximum value and the minimum value of the average chromatic dispersions Dn of the sections 4n is at least 1.3 and not greater than 10.0.
    • 即使进行高速信号传输,也能够抑制光信号波长周围的边带的形成的色散管理的光纤传输线。 光纤传输线1构成安装在发射机(或中继器)2和接收机(或中继器)3之间的一个中继器阵列,并且由发射机2到接收机3依次由N个部分41至4N组成。 波长1.55μm处的色散在n为奇数的区间4n中为正,在n的值为n的区间4n为负。 区间4n的平均色散Dn的最大值和最小值之间的比例为至少1.3且不大于10.0。
    • 17. 发明申请
    • Imaging system
    • 成像系统
    • US20090012405A1
    • 2009-01-08
    • US11664979
    • 2006-11-17
    • Takemi HasegawaTakashi IwasakiToshiaki OkunoMasashi Onishi
    • Takemi HasegawaTakashi IwasakiToshiaki OkunoMasashi Onishi
    • A61B6/00
    • A61B5/0086A61B5/0084A61B90/36A61B2090/373
    • An imaging system 1 comprises: an illumination light source unit 10 that emits an illumination light having a wavelength in a near-infrared range; an illumination optical system 20 that illuminates an observed object 90 with the illumination light emitted from the illumination light source unit 10; an imaging optical system 30 that guides as a physical body light the illumination light that has been illuminated by the illumination optical system 20 onto the observed object 90 and has been scattered, reflected, or refracted thereby; and an imaging unit 40 that has an imaging sensitivity in a wavelength band of a near-infrared range, receives the physical body light arrived after being guided by the imaging optical system 30, and images the image of the observed object 90. The imaging unit 40 receives the physical body light after the light has passed through water and hemoglobin.
    • 成像系统1包括:照射光源单元10,其发射具有近红外范围的波长的照明光; 照明光学系统20,其利用从照明光源单元10发射的照明光照亮被观察物体90; 作为物理体引导的成像光学系统30将由照明光学系统20照射的照明光照射到被观察物体90上并被散射,反射或折射; 以及在近红外范围的波长带中具有成像灵敏度的成像单元40接收在被成像光学系统30引导之后到达的物理体光,并对观察对象90的图像进行成像。成像单元 40在光线通过水和血红蛋白后接收身体的光线。