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21. 发明专利

JPS58135157A APPARATUS FOR COATING PLASTIC 失效
公开(公告)号：JPS58135157A
公开(公告)日：1983-08-11
申请号：JP1632182
申请日：1982-02-05
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： SAKAGUCHI SHIGEKI , SENDA KAZUNORI , NAKAHARA MOTOHIRO
IPC分类号： B05C3/15 , B05D7/20 , C03C25/12 , G02B6/44
摘要： PURPOSE:The titled apparatus, having plural spiral grooves or fins in a gap formed by a mandrel and a die, and capable of causing a vortex in a liquid plastic flow and forming a coating layer without the uneven distribution on optical fibers, etc. CONSTITUTION:An optical fiber 6 is passed through an opening 6 of a coating apparatus, and a pressurized liquid plastic material is introduced from a resin feed port 3 into the coating apparatus. The plastic material is made to flow in the form of a spiral by grooves 5 formed on the periphery of the mandrel 2 to form a vortex thereof in an opening part 6 of a die 4. The optical fiber is automatically moved to the center of the opening 6 to form a coating layer without the uneven distribution. The automatic centering action of the optical fiber 1 will not cause the contact of the uncoated optical fiber 1 with the opening part 6 of the mandrel 2. The high-speed coating can be carried out by adjusting the feed pressure of the liquid plastic material, and the thickness of the coating layer can be controlled.

22. 发明专利

JPS58125626A CONJUGATED QUARTZ TUBE FOR OPTICAL FIBER AND ITS PRODUCTION 失效
公开(公告)号：JPS58125626A
公开(公告)日：1983-07-26
申请号：JP674582
申请日：1982-01-21
申请人： NIPPON TELEGRAPH & TELEPHONE , SUMITOMO ELECTRIC INDUSTRIES
发明人： SAKAGUCHI SHIGEKI , KUWABARA TOORU , SATOU HISAO , YOSHIDA MASAAKI
IPC分类号： C03B37/01 , C03B37/014 , G02B6/00
摘要： PURPOSE:Fine particles of quartz glass are formed by the flame hydrolysis process and deposited on the outer surface of a glass tube, then the particles are converted into glass to produce the titled conjugated quartz tube with high tensile strength in low costs. CONSTITUTION:A heating gas (H2, O2) and a starting material gas (SiCl4, SiH4) are fed to the burner 3 to effect oxidation or flame hydrolysis and the resultant fine particles of synthetic quartz glass are deposited on the outer surface of a glass tube which is kept at about 600-1,600 deg.C on its surface to form a layer of the fine particles 6. Then, the resultant tube is heated in an electric resistance furnace to convert the particles into transparent glass to produce the objective conjugated quartz tube 12 that is composed of a glass tube 1 coated with the synthetic quartz layer 2.

23. 发明专利

JPS57196735A DRAWING METHOD FOR OPTICAL FIBER 失效
公开(公告)号：JPS57196735A
公开(公告)日：1982-12-02
申请号：JP7912481
申请日：1981-05-27
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： SAKAGUCHI SHIGEKI , SENDA KAZUNORI , NAKAHARA MOTOHIRO
IPC分类号： C03B37/027 , C03B37/029 , G02B6/00
摘要： PURPOSE:To prevent impurity particles in a heating furnace from sticking to the surface of a rodlike glass base material for an optical fiber and to obtain a high purity optical fiber with high mechanical strength by grounding the base material when it is softened in the furnace and drawn. CONSTITUTION:A base material 1 is gradually fed into a furnace 4 and softened by heating with a heating element 6. The diameter of the material 1 is made smaller, and the material 1 is drawn into an optical fiber 2. At this time, in the base material heating region, that is, the region where the material 1 is made fine and drawn into the fiber 2, the material 1 is kept at a temp. above the softening temp., so it is charged by the volatilization of SiO2 and the friction with gaseous Ar from an inlet 7. Quartz glass in the region is converted into an electric conductor. Accordingly, by grounding the material 1 through a terminal 3 for ground attached to the position where the material 1 reaches the softening temp., the material 1 can be kept electrically neutral. Thus, particles produced in the furnace 4 can be prevented from sticking electrically to the surface of the material 1.

24. 发明专利

JPS57191248A COVERING OF OPTICAL FIBER 失效
公开(公告)号：JPS57191248A
公开(公告)日：1982-11-25
申请号：JP7643381
申请日：1981-05-22
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： SENDA KAZUNORI , SAKAGUCHI SHIGEKI , KIMURA TAKAO , NAKAHARA MOTOHIRO
IPC分类号： C03C25/42 , C03B37/10 , G02B6/44
摘要： PURPOSE:To obtain a metal-clad optical fiber having high strength, by connecting the chamber for the heating and spinning of optical fiber integrally with the chamber for the covering of the fiber with a metal layer, evacuating both chambers, and applying a metal layer to the surface of the spun optical fiber. CONSTITUTION:The heating chamber 4 for spinning is connected integrally with the covering chamber 7. The heating chamber 4 is furnished with the heat source 2, and the covering chamber 7 is furnished with the metal coating material generator 5. The covering chamber 7 is connected with a vacuum pump 8 to enable the evacuation of the heating chamber 4 and the covering chamber 7. The lower end of the optical fiber perform 1 is fused by the heat source 2 of the heating chamber 4, spun to an optical fiber 3, and introduced into the covering chamber 7, in which metal deposited to the outer circumference of the optical fiber 3 by evaporation, sputtering, CVD, etc. using the metal coating material generator 5.

25. 发明专利

JPS57100937A MANUFACTURING OF OPTICAL FIBER 失效
公开(公告)号：JPS57100937A
公开(公告)日：1982-06-23
申请号：JP17310180
申请日：1980-12-10
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： SAKAGUCHI SHIGEKI , KIMURA TAKAO , NAKAHARA MOTOHIRO
IPC分类号： C03C25/10 , C03B37/12 , G02B6/44
摘要： PURPOSE:To increase the spinning speed of an optical fiber without deteriorating the light-transmitting characteristics and mechanical characteristics of the fiber, by introducing a thermosetting resin between an optical fiber and a thermoplastic resin covering its surface simultaneously with the spinning of the optical fiber and the coating with the thermoplastic resin. CONSTITUTION:An optical fiber 1 is passed through the silicone-supplying nozzle 4 cooled with cooling water supplied through the water inlet 5. Then a polyester elastomer tube 6 is extruded with the extruder 8 through the cross-head 7 arranged coaxially with the nozzle 4. The elastomer 6 is heated with the heater 9 arranged coaxially with the head 7, softened, shrank, and brought into close contact with the fiber 1. During the above process, silicone 3 is introduced between the fiber 1 and the elastomer 6 through the nozzle 4. The introduced silicone 3 is heated and cured during the heating of the elastomer 6 with the heater 9. An optical fiber coated with silicone and polyester elastomer can be manufactured by this process.

26. 发明专利

JPS5735283A Electric furnace employing resistance heating body 失效
公开(公告)号：JPS5735283A
公开(公告)日：1982-02-25
申请号：JP11120880
申请日：1980-08-13
申请人： Nippon Telegraph & Telephone
发明人： SAKAGUCHI SHIGEKI , KIMURA TAKAO , NAKAHARA MOTOHIRO
IPC分类号： H05B3/40 , F27B17/00 , F27D11/02

27. 发明专利

JPS56155828A DETECTOR FOR FAULT OF OPTICAL FIBER 失效
公开(公告)号：JPS56155828A
公开(公告)日：1981-12-02
申请号：JP5949480
申请日：1980-05-07
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： SAKAGUCHI SHIGEKI , KIMURA TAKAO , SENDA KAZUNORI , SUDOU SHIYOUICHI
IPC分类号： G01M11/00
摘要： PURPOSE:To detect even a fault of size equivalent to a low-intensity area sufficiently by detecting light scattered due to a fault and emitted outward and by measuring the intensity of the scattered light. CONSTITUTION:A couple of integral balls 4 and 4' having the same characteristics are located under heater 2 and wire-drawn optical fiber 3 runs through them. Light emitted from the heating area of base material 1 passes through optical fiber 3 and is detected by photodetectors 5 and 5'. Outputs of detectors 5 and 5' are supplied to differential amplifier 7 via amplifiers 6 and 6' to amplify the difference in light intensity between the detection outputs and the difference is supplied to and recorded on recorder 8. Thus, only the intensity of scattered light due to a fault is detected and the size of the fault is made to correspond to the intensity of the scattered light, thereby finding the size of the fault from the intensity of scattered light.

28. 发明专利

JPS53125857A OPTICAL FIBER DRAWING APPARATUS 失效
公开(公告)号：JPS53125857A
公开(公告)日：1978-11-02
申请号：JP4114477
申请日：1977-04-11
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： NAKAHARA MOTOHIRO , SAKAGUCHI SHIGEKI
IPC分类号： C03B37/027 , C03B37/029 , G02B6/00
摘要： PURPOSE:To prevent an optical fiber from being damaged by abruptly cooling the fiber in a manner to blow gases to the fiber.

29. 发明专利

JP2001021852A MULTILAYERED FILM OPTICAL WAVELENGTH FILTER 失效
公开(公告)号：JP2001021852A
公开(公告)日：2001-01-26
申请号：JP18905199
申请日：1999-07-02
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： SAKAGUCHI SHIGEKI
IPC分类号： G02F1/03
摘要： PROBLEM TO BE SOLVED: To provide a variable wavelength filter having the wavelength characteristics in a narrow band by periodically and repeatedly laminating an electro-optic material and a dielectric material to obtain a multilayered film and varying the filtering wavelength with an electric field applied. SOLUTION: The variable wavelength filter has a multilayered film structure produced by periodically and repeatedly laminating an electro-optical material P and a dielectric material G. The structure of the multilayered film is expressed by [PG]m[2P][GP]m, wherein (m) is the number of repetition. In this structure, the period of laminated layers is symmetric for the [2P] part which is the center of lamination. As for the material P, barium titanate(BT) is used, and as for the material G, silicon dioxide is used. An optical axis of BT is aligned along a lamination direction (z axis), an electric field is applied in the x-axis direction perpendicular to the optical axis, and light waves with the electric field oscillating in the xz plane are used. When the electric field is applied in the x-axis direction, the refractive index of BT changes according to the intensity of the electric field applied and to the crystalline direction.

30. 发明专利

JP2000019474A MULTILAYERED FILM FARADAY ROTATOR 失效
公开(公告)号：JP2000019474A
公开(公告)日：2000-01-21
申请号：JP19157798
申请日：1998-07-07
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： SAKAGUCHI SHIGEKI , SUGIMOTO NAOTO
IPC分类号： G02F1/09
摘要： PROBLEM TO BE SOLVED: To make reducible the diffraction loss of an optical waveguide circuit, to facilitate hybrid high density integration with a plan a optical circuit and to reduce the thickness, by using a multilayered film having a periodic structure of a magneto-optical material thin film and a dielectric material thin film, in which the repeating period of them is reversed symmetrically with respect to the center of a film. SOLUTION: The multilayered film Faraday rotator has a laminated structure unit obtd. by laminating plural thin films of more than two kinds selected from between a magneto-optical material thin film and a dielectric material thin film in a periodically repeating manner. The laminated structure unit is the multilayered film having a periodic structure, in which the repeating period of them is reversed symmetrically with respect to the center of the film. And, the Faraday rotator has a multilayered film obtd. by laminating plural laminated structure unit, which is selected from a homogeneous or a heterogeneous laminated structure unit, in plural steps so that repeating period of each laminated structure unit maintains continuity in laminated boundary part. A high performance Faraday rotator can be realized in about 10 μm thickness by this method.

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