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1. 发明专利

JP2003255162A OPTICAL WAVEGUIDE USING PHOTONIC CRYSTAL AND METHOD OF MANUFACTURING THE WAVEGUIDE 审中-公开
公开(公告)号：JP2003255162A
公开(公告)日：2003-09-10
申请号：JP2002051641
申请日：2002-02-27
申请人： HITACHI CABLE , KAWAKAMI SHOJIRO , ODERA YASUO
发明人： OKUBO HIROYUKI , KAWAKAMI SHOJIRO , ODERA YASUO
IPC分类号： G02B6/12 , G02B5/18 , G02B6/13
摘要： PROBLEM TO BE SOLVED: To provide an optical waveguide with a low transmission loss using a photonic crystal which is easily manufactured and to provide a method of manufacturing the optical waveguide. SOLUTION: In the optical waveguide 1 in which a core 4 and a clad 5 are formed on the substrate 2, at least a part of the core 4 is formed with a photonic crystal 3, and the clad 5 is formed with a single layer film. The optical waveguide is manufactured by a self-cloning method, in which the ratio of the deposition to that of the etching is optimized, when the core or a part of the core formed with a dielectric multilayer type photonic crystal is sputter etched simultaneously or alternately sputter deposited. COPYRIGHT: (C)2003,JPO

2. 发明专利

JP2001091701A PHOTONIC CRYSTAL WITH MODULATED GRATING 失效
公开(公告)号：JP2001091701A
公开(公告)日：2001-04-06
申请号：JP30980499
申请日：1999-09-25
申请人： KAWAKAMI SHOJIRO , AUTOCLONING TECHNOLOGY KK
发明人： KAWAKAMI SHOJIRO , ODERA YASUO , SAKAI YOSHITAKE
IPC分类号： G02B5/04 , G02B1/00 , G02B1/02 , G02B5/18 , G02B5/28 , G02B6/12
摘要： PROBLEM TO BE SOLVED: To solve such problems that the latitude for the design of an optical circuit is low and designing a circuit having less sensitivity to manufacture errors is difficult because of the conventional assumption that the basic periodical length and direction of the basic period in the structure of a photonic crystal as the structural material of optical circuit parts are basically constant in the plane or volume of the crystal on the analogy of a natural crystal such as a semiconductor. SOLUTION: In a two-dimensional or three-dimensional photonic crystal having the feature that it is produced by depositing layers of substances on a substrate, the basic periodical length or the direction of the period of the crystal are not uniform in the relation of the position in the crystal, but are gradually varied or varied stepwise with the position and if necessary, varied in the perpendicular direction to the substrate. Namely, the crystal features a modulated grating. By this technique, wide latitude of processing and latitude of functions are obtained in photonic crystal optical circuit parts.

3. 发明专利

JP2001074954A PRODUCTION OF THREE DIMENSIONAL PHOTONIC CRYSTAL STRUCTURE 失效
公开(公告)号：JP2001074954A
公开(公告)日：2001-03-23
申请号：JP24652299
申请日：1999-08-31
申请人： NIPPON TELEGRAPH & TELEPHONE , KAWAKAMI SHOJIRO
发明人： NOTOMI MASAYA , TAMAMURA TOSHIAKI , TAKAHASHI CHIHARU , KAWAKAMI SHOJIRO , ODERA YASUO , KAWASHIMA TAKAYUKI
IPC分类号： G02B6/122
摘要： PROBLEM TO BE SOLVED: To obtain a structural body in which a three-dimensional full-band gap can be formed by a vertical hole process method by alternately laminating layers on a substrate having a pattern formed on which a shape-holding multilayer can be easily formed by self cloning. SOLUTION: A medium 30 (SiO2) and a medium 29 (a-Si) are alternately laminated by bias sputtering on a substrate having a pattern formed. By using a laminating mode to completely keep the form of the base (self cloning mode), a two-dimensional periodical laminated structure can be produced. Then, a two-dimensional periodical hole resist pattern is formed again by a lithographic process in this structural body. By using the resist pattern and by vertical dry etching, vertical holes 32 are formed in the structure. As a result, a three- dimensional photonic crystal structural body 34 having the high refractive index medium 29, high refractive index medium 30 and low refractive index medium 33 can be produced.

4. 发明专利

JP2000284227A OPTICAL CIRCULATOR AND OPTICAL SWITCH 失效
公开(公告)号：JP2000284227A
公开(公告)日：2000-10-13
申请号：JP8622299
申请日：1999-03-29
申请人： TOKIN CORP , KAWAKAMI SHOJIRO
发明人： HONMA HIROSHI , MASUMOTO TOSHIAKI , TSUCHIYA HARUHIKO , SATO TAKASHI , KAWAKAMI SHOJIRO
IPC分类号： G02B5/30 , G02B27/28
摘要： PROBLEM TO BE SOLVED: To provide a device of a low price without decreasing optical characteristics by constituting from a small number of parts. SOLUTION: The optical circulator is a 3-port or 4-port optical circulator independent from polarized light. The circulator is equipped with reflection type first and second polarizers 1, 2, at least one 45 deg. Faraday rotator 5 disposed between the first and second polarizers 1, 2, and further, a first total reflection mirror 3 which wholly reflects the exiting light from either the first polarizer 1 or the Faraday rotator 5 to allow the light to enter the other, and a second total reflection mirror 4 which wholly reflects the exiting light from either the second polarizer 2 or the Faraday rotator 5 to allow the light to enter the other.

5. 发明专利

JPH04349402A PRODUCTION OF OPTICAL ISOLATOR AND OPTICAL FIBER FOR OPTICAL ISOLATOR 失效
公开(公告)号：JPH04349402A
公开(公告)日：1992-12-03
申请号：JP12148091
申请日：1991-05-27
申请人： SUMITOMO ELECTRIC INDUSTRIES , KAWAKAMI SHOJIRO
发明人： HIRAI SHIGERU , ISHIGURO YOICHI , KAWAKAMI SHOJIRO , SHIRAISHI KAZUO
IPC分类号： G02B6/00 , G02B6/02 , G02B6/10 , G02F1/09
摘要： PURPOSE:To prevent the deterioration in isolation by the excessively oblique disposition of respective elements by forming the optical isolator in such a manner that the specific refractive index difference between the core part and clad part at the end face parts of the optical fibers to be mounted to both sides of a body is lower than in the other parts. CONSTITUTION:The optical isolator is so formed that the specific refractive index difference n2 of the core part 10 and clad part 11 in the end face parts of the optical fibers to be mounted to both sides of an optical isolator function part (optical isolator body) is lower than the specific refractive index difference n1 in the core part 10 and clad part 11 in the other ordinary part ( n2

6. 发明专利

JPH04307512A OPTICAL ISOLATOR 失效
公开(公告)号：JPH04307512A
公开(公告)日：1992-10-29
申请号：JP7176991
申请日：1991-04-04
申请人： SUMITOMO ELECTRIC INDUSTRIES , KAWAKAMI SHOJIRO
发明人： ISHIGURO YOICHI , HIRAI SHIGERU , HATTORI YASUJI , KAWAKAMI SHOJIRO , SHIRAISHI KAZUO
IPC分类号： G02B27/28 , G02F1/09
摘要： PURPOSE:To eliminate the generation of the angle deviation between the optical fibers on an incident side and an exit side and to allow the assembly without adjustment by diagonally cutting a groove at the intermediate of one piece of the optical fiber embedded in a substrate and disposing polarization beam splitters and a Faraday rotor in this groove. CONSTITUTION:The groove 8 to accommodate an optical element 6 is diagonally cut at a prescribed angle theta at the intermediate of one piece of the optical fiber 4 embedded in the substrate 2. The parallel flat plate-shaped polarization beam splitters 10, 12, 14 constituting the optical element 6 and the Faraday rotor 16 are disposed in this groove 8. Further, a cylindrical magnet is built to cover the rotor 16. The angle theta at which the groove 8 becomes the optical axis of the optical fibers 4 and the thicknesses of the beam splitters 10, 12, 14 are previously designed in such a manner that the refractive angle of the optical fibers 4 and the lateral deviation by the polarization beam splitters are offset. The light emitted from the beam splitter 14 on the output end side can, therefore, be made incident on the exit side optical fiber 4B existing in the same optical axis as the optical axis of the incident side optical fiber 4A.

7. 发明专利

JPH0322962B2 失效
公开(公告)号：JPH0322962B2
公开(公告)日：1991-03-28
申请号：JP4017484
申请日：1984-03-01
申请人： KAWAKAMI SHOJIRO , SUMITOMO DENKI KOGYO KK
发明人： KAWAKAMI SHOJIRO , SHIRAISHI KAZUO
IPC分类号： G02B6/00 , G02B5/30 , G02B6/26 , G02B6/42 , G02B27/28 , G02F1/09

8. 发明专利

JPS6360412A METHOD FOR MAKING LIGHT INCIDENT UPON SIDE OF OPTICAL FIBER AND METHOD FOR PHOTODETECTING LIGHT RADIATED FROM SIDE OF OPTICAL FIBER 失效
公开(公告)号：JPS6360412A
公开(公告)日：1988-03-16
申请号：JP20381086
申请日：1986-09-01
申请人： NIPPON TELEGRAPH & TELEPHONE , KAWAKAMI SHOJIRO
发明人： TATSUTA MITSUHIRO , KAWAKAMI SHOJIRO , MURATA HISASHI , FURUKAWA SHINICHI , YAMASHITA KATSUYA
IPC分类号： G02B6/28 , G02B6/42
摘要： PURPOSE:To focus light beams which have been made incident upon the outside of a fiber, into a core, and to focus light beams radiated to the outside from a bend part of the fiber, to a light receiving optical fiber, by compensating a scattering phenomenon effect of a clad part and a covered layer by a hologram. CONSTITUTION:When a reference luminous flux 11 and a radiation luminous flux 12 have been superposed on a photosensitive material 13a, if an optical path difference of these luminous fluxes is below an intrinsic coherent distance which a light source 6 has, an interference fringe is formed on the photosensitive material 13a. The optical path length is given by the product of a distance through which light beams have passed and a refractive index of its medium. In this case, a passing distance of the reference luminous flux 11 is longer than a passing distance of the radiation luminous flux 12. On the other hand, a refractive index of an optical fiber is about 1.5, and higher than a refractive index (about 1) of air, therefore, the optical path lengths of the reference luminous flux 11 and the radiation luminous flux 12 can be allowed to coincide enough within a range of a coherent distance, and by developing the photosensitive material 13a to which a suitable exposure quantity has been given, a hologram is made. Also, by a type of the hologram, power can be concentrated on a main diffracted luminous flux.

9. 发明专利

JPS6319621A OPTICAL SWITCH 失效
公开(公告)号：JPS6319621A
公开(公告)日：1988-01-27
申请号：JP16449186
申请日：1986-07-11
申请人： KAWAKAMI SHOJIRO , SUMITOMO SPEC METALS
发明人： KAWAKAMI SHOJIRO , MINAKATA MAKOTO , TAKADA MITSUHIRO , TOYODA YUKIO
IPC分类号： G02F1/055
摘要： PURPOSE:To make a switching speed extremely fast and to enable low-voltage driving by laminating a thin metallic film and a dielectric thin film which is thicker than it alternately many times at right angles to an axis and thus arranging a polarizer which contacts the overall sectional area of a core. CONSTITUTION:A rectangular prismatic PLZT (Pb, La, Zr, and Ti) 5 which has electrodes 6 and 7 on its opposite surfaces is fitted and arranged in a groove part 8, but the depth direction of the groove 8 is set to the direction between the electrodes 6 and 7 of the PLZT 5 and one electrode 7 is arranged in contact with the bottom surface of the groove part 8; and a couple of groove parts 8 are provided at specific distance from the PLZT 5 and polarizers 9 whose lamination direction is in a necessary direction to constitute an optical switch. Further, the PLZT 5 and polarizers 9 are embedded in the grooves parts 4 and 8 and a contacting surface which is large enough to cover the entire sectional area of the core 4 is provided between the groove parts and core 3. Consequently, the low-voltage driving is possible, the switching speed is extremely high, and transmission circuit simplification and size reduction become possible.

10. 发明专利

JPS60191208A Optical circuit element and its production 失效
标题翻译：光电元件及其生产
公开(公告)号：JPS60191208A
公开(公告)日：1985-09-28
申请号：JP4798084
申请日：1984-03-12
申请人： Kawakami Shojiro , Sumitomo Electric Ind Ltd
发明人： BABA KAZUTAKA , SHIRAISHI KAZUO , KAWAKAMI SHIYOUZABUROU
IPC分类号： G02B6/13 , G02B1/08 , G02B6/12 , G02B6/134
CPC分类号： G02B6/1342
摘要： PURPOSE:To obtain an optical waveguide which has optional spread from a visible part to an IR region with less light loss by diffusing potassium as a dopant on a glass substrate and forming a glass film thereon then diffusing again the potassium. CONSTITUTION:An Al layer 4 including a groove 6 is formed on a glass substrate 1 contg. Na ion and is immersed in molten KNO3 7 to diffuse K ions into the part of the groove 6. A glass film 2 is formed by RF sputtering on the substrate 1. The substrate 1 is heated to diffuse again the K ion, thus forming a diffused region 3 having a high refractive index. The diffused region 3a having ununiform spread is also formable by using a carbon dioxide laser and performing locally distributed heating. The optical waveguide having optional spread from the visible part to IR part with less light loss is thus obtd.
摘要翻译：目的：通过在玻璃基板上扩散作为掺杂剂的钾并在其上形成玻璃膜，获得具有从可见部分到IR区域的可选扩散的光波导，并且再次扩散钾。构成：在玻璃基板1上形成包括槽6的Al层4。并将其浸入熔融的KNO 3 7中以将K离子扩散到槽6的一部分中。通过RF溅射在衬底1上形成玻璃膜2.衬底1被再次扩散K离子，从而形成具有高折射率的扩散区域3。具有不均匀扩散的扩散区域3a也可以通过使用二氧化碳激光器并且执行局部分布的加热而形成。因此，具有从可见部分扩散到具有较少光损失的IR部分的光波导因此被实现。

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