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1. 发明专利

JP2004233686A Light transmission method 审中-公开
公开(公告)号：JP2004233686A
公开(公告)日：2004-08-19
申请号：JP2003022565
申请日：2003-01-30
申请人： Mitsubishi Cable Ind Ltd , Nippon Telegr & Teleph Corp , 三菱電線工業株式会社 , 日本電信電話株式会社
发明人： SUZUKI AKIHITO , FUJITA MORIYUKI , TANAKA MASATOSHI , KUBOTA HIROKAZU , SUZUKI KAZUNOBU , KAWANISHI SATOKI
IPC分类号： G02B6/00 , G02B6/032 , G02B6/20
摘要： PROBLEM TO BE SOLVED: To provide a method of transmitting light in a single mode to a photonic crystal fiber. SOLUTION: With the photonic crystal fiber 10 comprising a solid core 11 which extends in the longitudinal direction and a clad 12 which is formed with a prescribed grid pattern in the fiber cross section by means of a plurality of fine holes 12a installed in a manner covering and extending along the core 11, and which is thus formed with a photonic crystal structure in the radial direction of the fiber; the core 11 is made to transmit light so that normalized frequency V eff defined in the following relational expression becomes 4.1-12.0: V eff =2π×(Λ/λ)×√ä(refractive index of core) 2 -(effective refractive index of clad) 2 } where Λ is the hole pitch of the fine holes 12a of the photonic crystal fiber 10 and λ is the wavelength of light to be transmitted to the core 11. COPYRIGHT: (C)2004,JPO&NCIPI

2. 发明专利

JP2004077891A Photonic crystal fiber and its design method 有权
标题翻译：光子晶体纤维及其设计方法
公开(公告)号：JP2004077891A
公开(公告)日：2004-03-11
申请号：JP2002239310
申请日：2002-08-20
申请人： Mitsubishi Cable Ind Ltd , Nippon Telegr & Teleph Corp , 三菱電線工業株式会社 , 日本電信電話株式会社
发明人： YAMAMOTO TETSUYA , YAMATORI SHINYA , FUJITA MORIYUKI , SUZUKI KAZUNOBU , KUBOTA HIROKAZU , KAWANISHI SATOKI
IPC分类号： G02B6/032 , H01S3/06 , H01S3/10 , G02B6/20
摘要： PROBLEM TO BE SOLVED: To provide a photonic crystal fiber having a large numerical aperture (NA). SOLUTION: The photonic crystal fiber 10 comprises: a core 11 extended in the longitudinal direction; and a clad 13 in which a specified lattice pattern is formed at the fiber cross section by a plurality of narrow holes 13a provided to cover the core 11 and extended along the core 11 to constitute a photonic crystal structure in a radial direction of the fiber. In each of the narrow holes 13a of the clad 13, a hole diameter (d) and a hole pitch (A) at the fiber cross section are set, respectively so that the numerical aperture (NA) with respect to a light at a wavelength of 630 nm of a portion surrounded by the clad 13 may be 0.2 or higher. COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：提供具有大数值孔径（NA）的光子晶体光纤。解决方案：光子晶体光纤10包括：沿纵向方向延伸的芯11; 以及包覆层13，其中通过多个窄孔13a在纤维横截面处形成指定的格子图案，所述多个窄孔13a设置成覆盖芯11并且沿芯11延伸以在纤维的径向方向上构成光子晶体结构。在包层13的每个窄孔13a中，分别设置纤维横截面处的孔直径（d）和孔间距（A），使得相对于波长的光的数值孔径（NA）由包层13包围的部分的630nm可以为0.2以上。版权所有（C）2004，JPO

3. 发明专利

JP2004053625A Method and device for splicing optical fibers 审中-公开
公开(公告)号：JP2004053625A
公开(公告)日：2004-02-19
申请号：JP2002206631
申请日：2002-07-16
申请人： Mitsubishi Cable Ind Ltd , Nippon Telegr & Teleph Corp , 三菱電線工業株式会社 , 日本電信電話株式会社
发明人： YAMATORI SHINYA , TANAKA MASATOSHI , KAWANISHI SATOKI , SUZUKI KAZUNOBU , KUBOTA HIROKAZU
IPC分类号： G02B6/255
摘要： PROBLEM TO BE SOLVED: To provide a method and a device for splicing optical fibers by which an optical fiber having many pores at a clad part like a photonic crystal fiber (PCF) and another optical fiber are spliced in a state where their core positions are easily aligned. SOLUTION: Two PCFs 1 and 1 are fixed and held in holding members 21 so that their end faces 5 may face to each other. The end faces 5 are reflected on a mirror 22 and observed through a camera 24, and their images are processed by an image processing device 25 so that the core positions of both of them may be confirmed. By finely moving respective 1st driving parts 26 in accordance with the information of the core positions, the PCFs are adjusted so that the cores exist on the same axis. Then, the end faces 5 are made to approach and butted, and then melted and spliced. COPYRIGHT: (C)2004,JPO

4. 发明专利

JP2004053624A Single polarization optical fiber 有权
公开(公告)号：JP2004053624A
公开(公告)日：2004-02-19
申请号：JP2002206625
申请日：2002-07-16
申请人： Mitsubishi Cable Ind Ltd , Nippon Telegr & Teleph Corp , 三菱電線工業株式会社 , 日本電信電話株式会社
发明人： TANAKA MASATOSHI , YAMAMOTO TETSUYA , KOYANAGI SHIGEKI , FUJITA MORIYUKI , KAWANISHI SATOKI , SUZUKI KAZUNOBU , KUBOTA HIROKAZU
IPC分类号： G02B6/032 , G02B6/024 , G02B6/17 , G02B6/20
摘要： PROBLEM TO BE SOLVED: To provide a single polarization optical fiber having a wide wavelength band where it holds linear polarization, and easily manufactured. SOLUTION: The core 2 of the optical fiber 1 made of quartz glass is surrounded by six 1st pores 3a. Then, three 2nd pores 3b are respectively arranged at two parts opposed each other while putting the core in between on the outside of the surrounding part. Wavelength regions where propagated light is not outputted because it leaks out to the outside are different between an up-and-down direction singly surrounded by the pores 3a and a right-and-left direction doubly surrounded by the pores 3a and 3b, whereby the optical fiber 1 functions as the single polarization optical fiber. COPYRIGHT: (C)2004,JPO

5. 发明专利

JP2004067438A Method of manufacturing optical fiber 有权
公开(公告)号：JP2004067438A
公开(公告)日：2004-03-04
申请号：JP2002228336
申请日：2002-08-06
申请人： Mitsubishi Cable Ind Ltd , Nippon Telegr & Teleph Corp , 三菱電線工業株式会社 , 日本電信電話株式会社
发明人： YAMATORI SHINYA , SUZUKI AKIHITO , FUJITA MORIYUKI , KAWANISHI SATOKI , SUZUKI KAZUNOBU , KUBOTA HIROKAZU
IPC分类号： G02B6/00 , C03B37/012 , G02B6/024 , G02B6/17
CPC分类号： C03B37/01211 , C03B37/01217 , C03B2201/31 , C03B2201/32 , C03B2203/31
摘要： PROBLEM TO BE SOLVED: To provide a method of manufacturing an optical fiber by which the optical fiber used as a polarizer is inexpensively and simply manufactured. SOLUTION: A core rod 3 formed by doping Ge on the center axis of a quartz pipe 2 is arranged and an optical attenuation rod 4, 4 formed by doping Al which is an optical attenuating material on both sides in a high concentration is arranged. An optical fiber preform 1 is formed by packing a clad rod 5 into the residual part of holes of the quartz pipe 2. The optical Fiber is the polarizer emitting polarized light in the oscillation direction vertical in the figure. COPYRIGHT: (C)2004,JPO

6. 发明专利

JP2004101565A Dispersion compensation fiber 审中-公开
公开(公告)号：JP2004101565A
公开(公告)日：2004-04-02
申请号：JP2002259139
申请日：2002-09-04
申请人： Mitsubishi Cable Ind Ltd , Nippon Telegr & Teleph Corp , 三菱電線工業株式会社 , 日本電信電話株式会社
发明人： SUZUKI AKIHITO , TANAKA MASATOSHI , FUJITA MORIYUKI , KAWANISHI SATOKI , KUBOTA HIROKAZU , SUZUKI KAZUNOBU
IPC分类号： G02B6/00 , G02B6/032 , G02B6/20
摘要： PROBLEM TO BE SOLVED: To provide a dispersion compensation fiber having a high negative wavelength dispersion by a simple and low-cost method. SOLUTION: First bores 2, 2, etc., are arranged around a core 1 and second bores 3, 3, etc., of the bore diameter smaller than the bore diameter of the first bores 2 are arranged around the same. Further, a multiplicity of the first bores 2, 2, etc., are periodically arranged around the same. The light propagating in the fiber advances through the core 1 and the portion of a second clad section where the second bores 3, 3, etc., are arranged. A super mode phenomenon is brought about by the synergistic effect of these modes and therefore the optical fiber turns to the dispersion compensation fiber having the high negative wavelength dispersion. COPYRIGHT: (C)2004,JPO

7. 发明专利

JP2003337239A Dispersion-shifted optical fiber 有权
标题翻译：分散透镜光纤
公开(公告)号：JP2003337239A
公开(公告)日：2003-11-28
申请号：JP2002143758
申请日：2002-05-17
申请人： Mitsubishi Cable Ind Ltd , Nippon Telegr & Teleph Corp , 三菱電線工業株式会社 , 日本電信電話株式会社
发明人： SUZUKI KAZUNOBU , KAWANISHI SATOKI , KUBOTA HIROKAZU , TANAKA MASATOSHI , FUJITA MORIYUKI
IPC分类号： G02B6/032 , G02B6/02 , G02B6/20
CPC分类号： G02B6/02338 , G02B6/02042 , G02B6/02242 , G02B6/02276 , G02B6/02347 , G02B6/02361 , G02B6/0281 , G02B6/03627 , G02B6/03644 , G02B6/03688
摘要： PROBLEM TO BE SOLVED: To provide a dispersion-shifted optical fiber having a low loss, low dispersion slope and 1.55 micron region. SOLUTION: The core region (a) is one with GeO 2 added in a high concentration. The core region (b) is composed of pure SiO 2 glass. The clad part 3 is arranged in the periphery of the core regions. The clad part 3 is formed with a large number of air holes 4 extending in the longitudinal direction of the optical fiber. The position of the air holes 4 in the clad part 3 is not in disorder but forms a honeycomb shape with a hexagon having a side length Λ as the basic grid. In the center of the core regions 1, 2, there is a region 3 with a refractive index higher than in the periphery of the core regions 1, 2. The refractive index distribution of the core regions 1, 2 is such that the group velocity dispersion in the operating wavelength of this region 3 becomes a normal dispersion. COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：提供具有低损耗，低色散斜率和1.55微米区域的色散位移光纤。解决方案：核心区域（a）是以高浓度添加的GeO 2 的区域。核心区域（b）由纯SiO 2 玻璃构成。包层3设置在芯区域的周边。包层部3形成有沿着光纤的长度方向延伸的大量气孔4。包层部3中的空气孔4的位置不是无序的，而是形成具有侧长为Λ的六边形作为基本格栅的蜂窝形状。在芯区域1,2的中心，存在折射率高于芯区域1,2周边的区域3.芯区域1,2的折射率分布使得群体速度该区域3的工作波长的色散成为正常色散。版权所有（C）2004，JPO

8. 发明专利

JP2003081656A Method of manufacturing photonic crystal fiber 有权
标题翻译：制造光子晶体纤维的方法
公开(公告)号：JP2003081656A
公开(公告)日：2003-03-19
申请号：JP2001272870
申请日：2001-09-10
申请人： Mitsubishi Cable Ind Ltd , Nippon Telegr & Teleph Corp , 三菱電線工業株式会社 , 日本電信電話株式会社
发明人： YAMAMOTO TETSUYA , ITO HIDEAKI , FUJITA MORIYUKI , KAWANISHI SATOKI , KUBOTA HIROKAZU , SUZUKI KAZUNOBU
IPC分类号： G02B6/00 , C03B37/012 , G02B6/02
CPC分类号： G02B6/02333 , C03B37/0122 , C03B37/0124 , C03B2203/14 , C03B2203/42 , G02B6/02347
摘要： PROBLEM TO BE SOLVED: To provide a method of manufacturing a photonic crystal fiber which is good in productivity and is enhanced in the degree of freedom of design. SOLUTION: The method of manufacturing the photonic crystal fiber having a fiber body formed with a solid core at the center of the fiber and provided with a clad having a plurality of fine pores extending along the core so as to enclose the core and a coating section for coating the fiber body is constituted to have a boring process step of forming a plurality of pores 1a extending in the axial direction of a rod material 1 made of quartz so as to correspond to the pore patterns of the cross section of the fiber body, a preform body forming process step of forming a preform body 3 casting the fiber body by reducing the diameter of the rod material 1 formed with a plurality of pores 1a by heating and stretching the rod material in the axial direction of the rod and a drawing process step of constituting the preform by the preform body 3 and the coating section forming material made of the quartz to constitute the above coating section and reducing the diameter of this preform by drawing.
摘要翻译：要解决的问题：提供一种制造生产率好且增强设计自由度的光子晶体光纤的方法。解决方案：制造光纤晶体纤维的方法，该光子晶体纤维在纤维的中心形成有实心芯的纤维体，并且具有包层，该包层具有沿核心延伸的多个细孔，从而包围芯部，为了使纤维体的涂布构成为具有形成沿着由石英制成的杆材1的轴向延伸的多个孔1a以对应于纤维体的截面的孔图案的多孔孔的步骤，预成型体本体形成工序，形成预成型体3，通过在杆的轴向上加热拉伸棒材而使多个孔1a形成的棒材1的直径缩小而铸造纤维体;拉伸工序通过预成型体3和由石英制成的涂布部形成材料构成预成型体的步骤，以构成上述涂布部分，并通过拉伸减小该预成型件的直径。

9. 发明专利

JP2006162634A Single mode photonic crystal optical fiber 有权
标题翻译：单模光电晶体光纤
公开(公告)号：JP2006162634A
公开(公告)日：2006-06-22
申请号：JP2002359871
申请日：2002-12-11
申请人： Mitsubishi Cable Ind Ltd , Nippon Telegr & Teleph Corp , 三菱電線工業株式会社 , 日本電信電話株式会社
发明人： KUBOTA HIROKAZU , KAWANISHI SATOKI , SUZUKI KAZUNOBU , SUZUKI AKIHITO , TANAKA MASATOSHI , FUJITA MORIYUKI
IPC分类号： G02B6/032 , G02B6/00 , G02B6/02
CPC分类号： G02B6/02347 , B82Y20/00 , G02B6/02357
摘要： PROBLEM TO BE SOLVED: To provide a single mode photonic crystal optical fiber which has high design flexibility of optical characteristics and hardly causes a bending optical loss. SOLUTION: A clad part 12 in which a plurality of columnar voids 14 each having a diameter (d) are periodically arranged at a center-to-center spacing Λ is provided around a core part 11 having a geometrical radius ρ, wherein the center-to-center spacing Λ of the holes 14 is set to be ≥1.5 times of wavelength λ of propagation light and a V value given by following expression (1) is set to be >2.4 and eff is effective refractive index at the clad part and n core is refractive index at the core part. At least one of geometric placement of the voids 14 at the clad part 12 and optical constant distribution of the clad part 12 or the core part 11 is set less than trigonal-axis symmetry with respect to the central axis of the core part 11 and polarization mode degeneracy of the propagation light is released. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供具有高设计灵活性的光学特性并且几乎不引起弯曲光学损耗的单模光子晶体光纤。解决方案：在具有几何半径ρ的芯部11的周围，围绕具有几何半径ρ的芯部11设置多个具有直径（d）的柱状空隙14以中心间隔Λ周期性排列的包层部12，孔14的中心间距Λ设定为传播光的波长λ的1.5倍，并且由下式（1）给出的V值设定为> 2.4和<3.3。在表达式（1）中，n eff 是包层部分的有效折射率，n 芯是芯部的折射率。在包层部分12处的空隙14的几何放置和包层部分12或芯部11的光学恒定分布中的至少一个被设置为小于相对于芯部11的中心轴线的三角轴对称性和极化传播光的模式退化被释放。版权所有（C）2006，JPO＆NCIPI

10. 发明专利

JP2004101864A Polarization holding photonic crystal fiber 有权
标题翻译：极化保持光子晶体光纤
公开(公告)号：JP2004101864A
公开(公告)日：2004-04-02
申请号：JP2002263572
申请日：2002-09-10
申请人： Mitsubishi Cable Ind Ltd , Nippon Telegr & Teleph Corp , 三菱電線工業株式会社 , 日本電信電話株式会社
发明人： TANAKA MASATOSHI , SUZUKI AKIHITO , FUJITA MORIYUKI , KAWANISHI SATOKI , KUBOTA HIROKAZU , SUZUKI KAZUNOBU
IPC分类号： G02B6/00 , G02B6/024 , G02B6/17
摘要： PROBLEM TO BE SOLVED: To provide a polarization holding photonic crystal fiber having high characteristics of holding polarization. SOLUTION: The photonic crystal fiber 1 has an optical propagation region 3 surrounded by many holes periodically arranged, and has a core 2 having an elliptic cross section and a higher refractive index than that of the surrounding area in the optical propagation region 3. The optical propagation region 3 is formed into an elliptic form by two large holes 6 in the upper and lower positions and four small holes 5 on either side, with the major axial direction of the ellipse same as that of the core 2. Thereby, the polarization holding functions of the both are superposed to give high polarization holding characteristics. COPYRIGHT: (C)2004,JPO

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