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81. 发明专利

JPH07140348A PRODUCTION OF OPTICAL WAVEGUIDE MODULE 失效
公开(公告)号：JPH07140348A
公开(公告)日：1995-06-02
申请号：JP28636293
申请日：1993-11-16
申请人： HITACHI CABLE
发明人： KUROSAWA YOSHINORI , TAKEYA NORIAKI , TERAOKA TATSUO
IPC分类号： G02B6/255 , C09J5/02 , G02B6/30
摘要： PURPOSE:To improve moisture resistance by subjecting both end faces of an optical waveguide element or one point of the adhesive surfaces of an optical fiber to a silane coupling treatment, then adhering and fixing the element and the fiber. CONSTITUTION:A dummy plate 2 is adhered and fixed atop the optical waveguide element 1. On the other hand, a glass fiber-cord 3 is arranged into the V-groove of a single-fiber V-groove plate 4 and is adhered and fixed to a retaining plate 5 by a UV adhesive. A 4-core fiber ribbon 6 is also arranged into the respective V-grooves of a 4-core V-groove plate 7 and the retaining plate 8 is loaded to house the fibers into the respective V-grooves. The fibers are then adhered and fixed by the UV adhesive. Both end faces on the inlet and exit sides of a waveguide block 9 adhered with the dummy plate 2 and the retaining plates 5, 8 and end faces on the waveguide side of the fiber blocks 10, 11 are optically polished. The polished surfaces of the respective block 9 to 11 are again subjected to the silane coupling treatment. Light is made incident from the glass fiber-cord 3 and optical axis adjustment is executed while the power of the exit light from the 4-core fiber ribbon 6 is monitored. The end faces of the respective blocks 9 to 11 are thereafter adhered and fixed.

82. 发明专利

JPH06347646A COATED FIBER SEPARATING TOOL OF RIBBON TYPE MULTIPLE OPTICAL FIBER 失效
公开(公告)号：JPH06347646A
公开(公告)日：1994-12-22
申请号：JP13767593
申请日：1993-06-08
申请人： HITACHI CABLE
发明人： TAKEYA NORIAKI , TERAOKA TATSUO , KUROSAWA YOSHINORI , TAKASUGI SATORU , SAKAMOTO TAKESHI
IPC分类号： G02B6/00 , G02B6/44 , H02G1/12
摘要： PURPOSE:To provide a tool particularly suitable for separating coated fibers of a ribbon type multiple optical fiber by shearing. CONSTITUTION:(1) The coated fiber separating tool is composed of a pair of shearing blade parts 22, 23 for shearing the ribbon type multiple optical fiber 11 and a separating member 14 for tearing the pantly sheared ribbon type multiple optical fiber 11 in the axial direction. (2) The coated fiber separating tool is composed of a pair of rotary shearing rollers respectively having stepped grooves for shearing the ribbon type multiple optical fiber 11 and an upper structural body and lower structural body for supporting these shearing rollers so as to make the rollers separable from each other.

83. 发明专利

JPH06174967A OPTICAL MODULE 失效
公开(公告)号：JPH06174967A
公开(公告)日：1994-06-24
申请号：JP32797892
申请日：1992-12-08
申请人： HITACHI CABLE
发明人： KUROSAWA YOSHINORI , TERAOKA TATSUO , KADOI TAKAYUKI
IPC分类号： G02B6/30
摘要： PURPOSE:To suppress one mis-alignment or optical axes at the time of welding holders and to decrease connection loss so as to assure long-term reliability by forming grooves parallel along a laser welded part of the butt end faces of metallic holders mounted with optical parts to each other. CONSTITUTION:This optical module is formed by butting three pieces of blocks 10a to 10c mounted with the optical parts, such as optical fibers against each other and joining the joint parts thereof by laser welding. The central block 10a is constituted of a metallic holder 11a made of a metal having an approximately U shape in section and a coupler element 12 adhered and fixed to the inner side thereof and is so joined that the optical axes of the single mode optical fiber 14 and the coupler element 12 provided in the right and left blocks 10b, 10c align to each other. The parallel grooves 17a to 17h are, thereupon, formed along the laser welded part 19 at the end faces where the metallic molders butt against each other. Then, through-ports 18a to 18d are formed by these grooves at the time of joining the metallic holders to each other. The heat transmission path from the laser welded part 19 to the optical parts is thus extended and the heat is radiated from the through-ports.

84. 发明专利

JPH05119232A END SPHERING METHOD FOR OPTICAL FIBER 失效
公开(公告)号：JPH05119232A
公开(公告)日：1993-05-18
申请号：JP28124691
申请日：1991-10-28
申请人： HITACHI CABLE , HITACHI LTD
发明人： MURAKAMI KAZUYA , TERAOKA TATSUO , NASUNO KOKI , KATO TAKESHI
IPC分类号： G02B6/32 , G02B6/42
摘要： PURPOSE:To obtain the end sphering method for an optical fiber which can easily from a end spherical lens having the less fluctuations in the radius and high accuracy with good reproducibility. CONSTITUTION:The optical fiber 1 is perpendicularly held to an optical fiber fixing base 3. The front end of the optical fiber 1 cut perpendicularly to the optical axis in a discharge heating part 4 is melted by heating. The front end of the optical fiber 1 is monitored by a television camera 6 at this time and the heating by the discharge is ended by an image processor 8 when the withdrawal quantity at the front end of the optical fiber 11 attains a prescribed value.

85. 发明专利

JPH05119224A STRUCTURE FOR CONNECTING OPTICAL FIBER COVERED WITH METALLIC PIPE 失效
公开(公告)号：JPH05119224A
公开(公告)日：1993-05-18
申请号：JP28146191
申请日：1991-10-28
申请人： HITACHI CABLE , NIPPON KOKAN KK
发明人： HIRAMOTO YOSHIYUKI , SHIGA KOICHI , TERAOKA TATSUO , YOSHIE YASUTETSU
IPC分类号： G02B6/24 , G02B6/44
摘要： PURPOSE:To facilitate connection and to avert the stress concn. to a juncture by subjecting at least a part of the outside surface of a sleeve pipe to waving. CONSTITUTION:Both ends of the sleeve pipe 3 are connected by welding along the outer periphery of a covering metallic pipe 2 to form a welded juncture 4. The sleeve pipe 3 which is bridged in such a manner and is connected by welding at both ends forms the covering of the juncture 11. The metallic pipe 2 and the sleeve pipe 3 overlap on each other and form an overlap part 13 near the welded juncture 4. The overlap part 13 is less flexible than the metallic pipe 2. On the other hand, a corrugated part 12 is formed near the overlap part 13 and, therefore, the juncture 11 is more high flexible in this corrugated part 12. Then, the optical fiber covered with the metallic pipe including the juncture 11 is so constructued that the force to bend the fiber acts as the force to bend the corrugated part 12 and does not concentrate the stresses to the overlap part 13. The bending stresses acting on the welded juncture 4 and the overlap part 13 are absorbed by bending of the corrugated part 12.

86. 发明专利

JPH0461818B2 失效
公开(公告)号：JPH0461818B2
公开(公告)日：1992-10-02
申请号：JP14828287
申请日：1987-06-15
申请人： HITACHI CABLE
发明人： KAJIOKA HIROSHI , YAMADA KIMIMICHI , TAKUMA TAKEYOSHI , TERAOKA TATSUO
IPC分类号： G02B6/00 , C03B9/41 , C03B37/012 , C03B37/014 , C03B37/018 , C03B37/02 , G02B6/024

87. 发明专利

JPH03274006A EQUAL-DIAMETER CONNECTING METHOD FOR MULTI-COATED OPTICAL FIBER 失效
公开(公告)号：JPH03274006A
公开(公告)日：1991-12-05
申请号：JP7404890
申请日：1990-03-23
申请人： ELECTRIC POWER DEV CO , HITACHI CABLE
发明人： FUJII KOICHIRO , SOTODANI SHIGEO , TERAOKA TATSUO , HIRAMOTO YOSHIYUKI
IPC分类号： G02B6/24
摘要： PURPOSE:To improve cutting accuracy by removing the metallic pipe at the outer periphery of an optical fiber unit by specific length and exposing the optical fiber unit by necessary length, fitting a sleeve which grips optical fibers together to its end part, and cutting the sleeve and optical fiber unit together in this state. CONSTITUTION:The metallic pipe 4 at a connection part is cut and removed by the specific length to expose the optical fiber unit 3. Then the sleeve 10 is fitted integrally to the cut end part of the optical fiber unit 3. In this state, the optical fiber unit 3 is cut from on the sleeve 10 together by using a diamond blade 11. Thus, the sleeve 10 is fitted and the unit 3 and sleeve 10 are both cut together, so that respective seven coated optical fibers 1 and 1 in the optical fiber unit 3 are all cut with high accuracy to constant length within a

88. 发明专利

JPH02130504A CONNECTING METHOD FOR OPTICAL FIBER CABLE 失效
公开(公告)号：JPH02130504A
公开(公告)日：1990-05-18
申请号：JP28473588
申请日：1988-11-10
申请人： HITACHI CABLE
发明人： TERAOKA TATSUO , SOTODANI SHIGEO , NARISHIMA KOICHI
IPC分类号： G02B6/24
摘要： PURPOSE:To eliminate the need to form an excessive-length loop, to process an excessive-length optical fiber cable in a short time, and to reduce the size of a connection part by a method wherein a specific length of optical coated fibers exposed from the connection end part thereof are woven to a specific length and the connected. CONSTITUTION:Optical coated fibers 6 of specific length are exposed from the connection end part of the optical fiber cable 4 and the exposed optical coated fibers 6 are woven to specific length and then connected. Thus, the optical coated fiber woven part 10 is formed to make the woven optical coated fiber 6 extensible. Consequently, the need to form an excessive-length loop is eliminated, and a plate for excessive-length loop storage need not be used; and the excessive-length optical fiber cable is processed in a short time and the connection part 7 is reducible in size.

89. 发明专利

JPH026908A FUSION SPLICING METHOD FOR OPTICAL FIBER 失效
公开(公告)号：JPH026908A
公开(公告)日：1990-01-11
申请号：JP15773288
申请日：1988-06-24
申请人： HITACHI CABLE
发明人： NARISHIMA KOICHI , TERAOKA TATSUO
IPC分类号： G02B6/255 , G02B6/24
摘要： PURPOSE:To enable the best self-alignment of all fibers by monitoring optical fibers nearby a fusion splicing zone by a monitoring device and heating the optical fibers additionally intermittently or periodically so that the optical fibers enters the best fusion splicing state. CONSTITUTION:Cores of a five-core fiber are heated and fused between electrodes 4 and 4 by 1st arc discharge and fusion spliced by being pushed in. Variation in external diameter and axis shifts of those fiber cores 101-105 are monitored on a monitor television and read by a CCD to repeat the additional discharge until their values become smaller than determined values. Consequently, even if their connection states are different or vary at the time of 1st fusion splicing, the heating is carried out while the extent of correction by the additional heating is confirmed at all times, so any excessive heating is not performed by mistake and the welding is carried out with the least connection loss.

90. 发明专利

JPH01279212A BATCH FUSION SPLICING METHOD FOR MULTIFIBER OPTICAL CABLE 失效
公开(公告)号：JPH01279212A
公开(公告)日：1989-11-09
申请号：JP10875788
申请日：1988-04-30
申请人： HITACHI CABLE
发明人： TERAOKA TATSUO , SUZUKI NOBUTAKA
IPC分类号： G02B6/24
摘要： PURPOSE:To prevent an increase in connection loss of multifiber optical cable by arranging the optical fibers to be connected with each other in vertical positions and softening the parts of the upper fibers at positions above the connecting position by heating so that the end sections of the upper side optical fibers can hang down by gravity before performing the splicing work. CONSTITUTION:Optical fibers 2, 2 are set to vertical position in a facing state and, for example, electrodes 12 and 12 are positioned at the positions a little above the splicing and faces 2a and 2a of the fibers 2 and 2 so as to soften the optical fibers 2 and 2 at the positions by performing arc discharges. When the optical fibers 2, 2 are softened at the positions, the end sections of the optical fibers 2, 2 hang down by gravity and the end faces 2a, 2a of the optical fibers 2, 2 on both sides are set to press-contacted states. When the end faces 2a, 2a are press-contacted with each other in such state, the electrodes 12 and 12 are moved to the splicing positions and caused to make arc dischargers. Therefore, the optical fibers 2, 2 are respectively fusion-spliced easily with each other by the end faces 2a, 2a. Thus an increase in splicing loss caused by the variation of the pressing quantity of the optical fibers at the time of fusion can be eliminated even when the cut lengths of the fibers are not uniform in the course of batch splicing of multicore optical fibers.

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