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1. 发明专利

JPS6198303A Adhesion of matching oil of optical fiber and aligning mechanism 失效
标题翻译：光纤匹配油和粘合机理的粘合
公开(公告)号：JPS6198303A
公开(公告)日：1986-05-16
申请号：JP22094884
申请日：1984-10-19
申请人： Fujikura Ltd , Furukawa Electric Co Ltd:The , Nippon Telegr & Teleph Corp , Sumitomo Electric Ind Ltd
发明人： USUI YUICHI , KAKII TOSHIAKI , KATO YASUYUKI , UEMATSU YUJI , MINAMIDA ISAO , YAMADA TAKESHI , OSATO KAZUKUNI
IPC分类号： G02B6/24 , G02B6/36
摘要： PURPOSE:To fix the quantity of adhesion of matching oil, to prevent the end surface of optical fibers from the formation of flaws and to make it possible to observe the optical fibers from two directions by allowing a housing to be positioned at four vertical stages and executing the adhesion of the matching oil and aligning at the movement to the 2nd position and the observation of a multimode fiber and its aligning at the movement to the 3rd position. CONSTITUTION:Optical fibers (a), a' are moved backwards by switching operation after fusion, the matching oil 6 is left on the end surfaces of the optical fibers (a), a', a stopper 11 is descended down to a position B, and then the right and left optical fibers a', a are moved forwards again. After moving one optical fiber a' or both of the optical fibers (a), a' forwards and applying the matching oil between the two optical fibers (a), a', the optical fibers (a), a' are aligned, a fusion welder starts to be discharged and one optical fiber a' is moved forwards moreover to execute fusion welding. In this case, the stopper 11 is located on positions A, B, no slit is formed on the adhering position of the matching oil 6, i.e. an abutting position 12 and two optical fibers (a), a', are once moved backwards before the descending of the stopper 11.
摘要翻译：目的：为了固定匹配油的粘附量，防止光纤端面形成缺陷，并且通过允许壳体定位在四个垂直的阶段，使得可以从两个方向观察光纤，并且执行匹配油的粘附，并且在向第二位置移动时对准并观察多模光纤，并且在向第三位移动时对齐。构成：通过熔融后的切换操作使光纤（a），a'向后移动，匹配油6留在光纤（a）的端面a'上，止动器11下降到位置B ，然后再次向前移动左右光纤a'，a。在移动一根光纤a'或两根光纤（a）之后，a'在两个光纤（a），a'之间向前并施加匹配油，将光纤（a），a'对齐，熔焊机开始放电，另外一根光纤a'向前移动，进行熔焊。在这种情况下，止动器11位于位置A，B上，在匹配油6的粘合位置上没有形成狭缝，即邻接位置12和两根光纤（a），a'在之前一度向后移动挡块11的下降。

2. 发明专利

JPS61120106A Connecting method of single-mode optical fiber 失效
标题翻译：单模光纤的连接方法
公开(公告)号：JPS61120106A
公开(公告)日：1986-06-07
申请号：JP24083084
申请日：1984-11-16
申请人： Nippon Telegr & Teleph Corp
发明人： KATO YASUYUKI , MIYAUCHI MITSURU , MATSUMOTO MICHITO , ISHIKURA AKIHIKO , KUBOTA ATSUYUKI
IPC分类号： G02B6/24 , G02B6/255 , G02B6/26
CPC分类号： G02B6/2551 , G02B6/2552
摘要： PURPOSE:To make a connection with low loss and high strength in a short time by forming a gently tapered connection part while connecting two single- mode optical fibers by welding. CONSTITUTION:Two single-mode optical fibers 1 and 2 to be connected together are set opposite each other and both their end surfaces are fused by heating and connected together by welding. Then, the optical fibers 1 and 2 are drawn away from the connection part 25 until the connection part 25 has necessary thickness; while the optical fiber 2 is fixed and the other optical fiber 1 is drawn, discharge electrodes 23A and 23B are moved simultaneously in such a direction that the optical fiber 1 is drawn, thereby forming a taper 27 at the side of the optical fiber 1. Then, the discharge electrodes 23A and 23B are returned to the center of the connection part and while the optical fiber 1 is fixed and the optical fiber 2 is drawn, the discharge electrodes 23A and 23B are moved in the drawing direction at the same time to form a taper 28 at the side of the optical fiber 2, thereby connecting the both together.
摘要翻译：目的：在短时间内通过形成一个轻微的锥形连接部分，同时通过焊接连接两根单模光纤，从而实现低损耗和高强度的连接。构成：要连接在一起的两个单模光纤1和2彼此相对设置，并且它们的端面通过加热熔合并通过焊接连接在一起。然后，将光纤1和2从连接部分25拉出，直到连接部分25具有必要的厚度; 在固定光纤2并拉出另一光纤1的同时，放电电极23A和23B沿着与光纤1拉出的方向同时移动，从而在光纤1的侧面形成锥形部27。然后，放电电极23A和23B返回到连接部分的中心，并且当光纤1固定并且光纤2被拉出时，放电电极23A和23B同时沿拉拔方向移动到在光纤2的侧面形成锥形28，从而将两者连接在一起。

3. 发明专利

JPS6129806A Connecting method of optical fiber 失效
标题翻译：光纤连接方法
公开(公告)号：JPS6129806A
公开(公告)日：1986-02-10
申请号：JP15166884
申请日：1984-07-21
申请人： Nippon Telegr & Teleph Corp
发明人： KATO YASUYUKI , MIYAUCHI MITSURU
IPC分类号： G02B6/24 , G02B6/255 , G02B6/36
CPC分类号： G02B6/2551
摘要： PURPOSE:To discriminate clearly axes of cores and to perform the alignment surely with a high reliability by heating preliminarily end faces of optical fibers when end faces of optical fibers are observed to align them. CONSTITUTION:Optical fibers 1 and 2 ar supported through jigs 10 and 11, and both end faces 1a and 2a are preliminarily subjected to heat treatment in a such degree by discharging electrodes 20 and 21 that melding connection is not affected. Since the melting temperature of core parts and stress giveing parts if lower than that of clad parts consisting of pure quartz, axial parts are discriminated clearly by this heat treatment. An illuminating light 6 is irradiated to end faces 1a and 2a of optical fibers 1 and 2 through a mirror 4, and core positions are discriminated clearly with a reflected light 7 by a microscope 5, and they are connected by welging after alignment. Thus, the alignment is performed surely with a high reliability.
摘要翻译：目的：通过观察光纤的端面对准光纤的端面时，通过加热光纤的预先端面，可以清楚核心轴线的确定性和高可靠性。构成：通过夹具10和11支撑的光纤1和2 ar，并且通过放电焊接连接不受影响的电极20和21，预先对两个端面1a和2a进行这种程度的热处理。由于核心部件的熔化温度和应力产生部件低于由纯石英组成的包层部件，所以通过该热处理来清楚轴向部件。照射光6通过反射镜4照射到光纤1和2的端面1a和2a，并且通过显微镜5用反射光7清楚核心位置，并且它们在对准之后通过焊接而连接。因此，可靠地执行对准。

4. 发明专利

JPS6129807A Production for depolarizer 失效
标题翻译：分离器生产
公开(公告)号：JPS6129807A
公开(公告)日：1986-02-10
申请号：JP15166984
申请日：1984-07-21
申请人： Nippon Telegr & Teleph Corp
发明人： KATO YASUYUKI
IPC分类号： G02B6/26 , G02B5/30 , G02B6/02 , G02B6/024 , G02B6/10
摘要： PURPOSE:To perform the alignment work easily and quickly and to obtain a simple device constitution by detecting lights reflected from exit ends of two polarization holding optical fibers to be connected only in incidence ends to align axes of double refraction. CONSTITUTION:A light 1 from a light source is polarized to a linearly polarized light and is made incident on a light source-side optical fiber 4. The light reflected on the exit end of the fiber 4 is received by a polarizer 2 in the incidence end, and an electric field component vertical to an incident light 3 is separated by the polarizer 2. The fiber 4 is so rotated that a separated light 7 is minimum, and the axis of double refraction is matched to the plane of polarization of the incident light. Thereafter, fiber 8 and 11 to be connected in the oppisite side of the light source are connected at connection points 9 and 12. Since the reflected light is separated in only the incidence side and axes of double refraction are joined so that its power is maximum, the alignment work is performed easily and quickly, and a simple device is obtained.
摘要翻译：目的：通过检测从入射端连接的两个偏振保持光纤的出射端反射的光，可以容易且快速地进行对准工作，从而获得简单的器件结构，以对准双折射轴。构成：来自光源的光1被偏振成线偏振光，并入射到光源侧光纤4上。在光纤4的出射端反射的光被入射的偏振器2所接收并且垂直于入射光3的电场分量被偏振器2分离。光纤4被旋转使得分离的光7最小，并且双折射轴与事件的偏振平面匹配光。此后，连接在光源的相对侧的光纤8和11在连接点9和12处连接。由于反射光仅在入射侧分离，双折射轴被接合，使得其功率最大，能够容易且快速地进行对准作业，得到简单的装置。

5. 发明专利

JPS61124908A Single-mode optical fiber connector and its manufacture 失效
标题翻译：单模光纤连接器及其制造
公开(公告)号：JPS61124908A
公开(公告)日：1986-06-12
申请号：JP24590084
申请日：1984-11-22
申请人： Nippon Telegr & Teleph Corp
发明人： KATO YASUYUKI , MIYAUCHI MITSURU , MIKAWA IZUMI
IPC分类号： G02B6/36 , G02B6/26 , G02B6/38 , G02B6/40
摘要： PURPOSE: To reduce the loss of an axial shift which is made during connector connection and to easily connect a single-mode optical fiber with a low loss to a connector by decreasing the diameter of a core on an end surface of a ferrule and increasing the spot size of a propagation mode.
CONSTITUTION: A discharge arc 22 is generated between discharging electrodes 21A and 21B and while the optical fiber is discharged and heated with the discharge arc 22, both ends of the optical fiber 1 are drawn. The optical fiber is drawn until conic tips 23 are formed to decrease the external diameter (d) of the fiber toward tips in a tapered shape, and consequently the diameter of the core in the fiber decrease in proportion to the external diameter, thereby forming tapered fiber ends 11. Then, an opening 17 with a specific small diameter is formed in the center of the ferrule end surface 16 and the tapered fiber end 11 of the single-mold optical fiber 1 is run through it. An adhesive 19 is filled in a gap 18 so as to fix the fibers 1 and 11 and ferrule 14, and the tapered fiber end 11A which protrudes from the ferrule opening 17 is removed.
COPYRIGHT: (C)1986,JPO&Japio
摘要翻译：目的：为了减少在连接器连接期间发生的轴向偏移的损失，并且通过减小套圈的端面上的芯的直径，并且容易地将具有低损耗的单模光纤连接到连接器，从而增加传播模式的斑点大小。构成：在放电电极21A和21B之间产生放电电弧22，并且当光纤被放电弧22放电和加热时，光纤1的两端被拉出。拉伸光纤直到形成圆锥尖端23，以将纤维的外径（d）减小到尖端的锥形形状，从而纤维中的纤芯直径与外径成比例地减小，从而形成锥形然后，在套圈端面16的中心形成具有特定小直径的开口17，使单模光纤1的锥形光纤端11贯穿其中。将粘合剂19填充在间隙18中，以固定纤维1和11以及套圈14，并且从套圈开口17突出的锥形纤维端11A被去除。

6. 发明专利

JPS6162829A Method and apparatus for measuring cut-off wavelength of lp11 mode in optical fiber 失效
标题翻译：用于测量光纤中LP11模式的切割波长的方法和装置
公开(公告)号：JPS6162829A
公开(公告)日：1986-03-31
申请号：JP18488484
申请日：1984-09-04
申请人： Nippon Telegr & Teleph Corp
发明人： KATO YASUYUKI
IPC分类号： G01M11/00 , G01N21/00 , G01N21/21
CPC分类号： G01M11/334 , G01N21/21
摘要： PURPOSE:To reduce the shift of a cut-off wavelength, by inserting a polarization maintaining optical fiber between a polarizer for linearily polarizing light and an optical fiber to be measured and allowing the linearily polarized light to be incident to said polarized wave holding optical fiber in matching relation to the double refraction axis of said fiber. CONSTITUTION:The wavelength of a wavelength variable light source 1 is determined so that the mode propagating through an optical fiber 6 to be measured is brought to a single mode state. When the polarizing direction of a polarizer 4 and the double refraction of a polarization maintaining optical fiber 14 are taken on an X-axis in this state, a LP01 mode is cut off by an analyser 7. When the wavelength of the wavelength variable light source 1 is successively changed to the side of a short wavelength, the mode propagating through the optical fiber 6 to be measured changes from the single mode state to two modes. The LP01 mode is cut off by the analyser 7 but a LP11 mode is not cut off by the analyser 7 but detected by a light detector 10.
摘要翻译：目的：为了减少截止波长的偏移，通过将偏振保持光纤插入到用于线性偏振光的偏振器和待测光纤之间并允许线偏振光入射到所述偏振波保持光纤与所述光纤的双折射轴匹配。构成：确定波长可变光源1的波长，使得通过待测光纤6传播的模式达到单模状态。当在这种状态下偏振器4的偏振方向和偏振保持光纤14的双折射被取作X轴时，通过分析器7切断LP01模式。当波长可变光源 1被连续地变成短波长的一侧，通过被测量光纤6传播的模式从单模状态变为两种模式。 LP01模式被分析仪7切断，但LP11模式不被分析仪7切断，而是由光检测器10检测。

7. 发明专利

JPS61117508A Connecting method of optical fiber 失效
标题翻译：光纤连接方法
公开(公告)号：JPS61117508A
公开(公告)日：1986-06-04
申请号：JP23763584
申请日：1984-11-13
申请人： Nippon Telegr & Teleph Corp
发明人： KATO YASUYUKI , ISHIKURA AKIHIKO , MIYAUCHI MITSURU
IPC分类号： G02B6/24 , G02B6/255 , G02B6/36
CPC分类号： G02B6/2551
摘要： PURPOSE:To lower the loss in welding connection of optical fibers without aligning the cores of the fibers, by dispersing the dopant contained in the optical fibers into the cladding layers of the fibers by excessively heating the connecting point and practically enlarging the spot size of the propagation mode. CONSTITUTION:When the connecting point 4 of welded fibers, whose cores are not aligned correctly, is heated, the dopant in the cores 3A and 3B of the fibers is thermally dispersed into the cladding layers 2A and 2B by the excessive heating and, as a result, the cores 3A and 3B at the connecting point 4 are enlarged. At the same time, glass moves to the center of the heated section and the outer diameter of the connecting section 4 becomes thicker by the surface tension of the molten quartz fibers. When the outer diameter of the connecting point 4 becomes thicker in such a way, the connecting loss is increased and the effect of lowering loss by the dispersion of the dopant is compensated. Therefore, at the time of heat welding, both the optical fibers 1A and 1B are compressed or pulled in the direction of length and the shape of the connecting point 4 is adjusted so that the cores 3A and 3B can be smoothly connected with each other. Accordingly, the loss in welding connection of optical fibers can be lowered without aligning the cores of the optical fibers.
摘要翻译：目的：为了降低光纤焊接连接的损耗，而不使光纤的芯线对准，通过过度加热连接点将光纤中包含的掺杂剂分散到光纤的包层中，实际上扩大了光纤尺寸传播模式。构成：当芯线不正确对准的焊接纤维的连接点4被加热时，纤维的芯3A和3B中的掺杂剂通过过度加热而热分散到包层2A和2B中，并且作为结果，连接点4处的芯3A和3B被放大。同时，玻璃移动到加热部分的中心，并且连接部分4的外径由于熔融石英纤维的表面张力而变厚。当连接点4的外径以这种方式变厚时，连接损耗增加，并且通过掺杂剂的分散而降低损耗的效果被补偿。因此，在热焊接时，光纤1A，1B都沿着长度方向被压缩或拉动，并且连接点4的形状被调整，使得芯3A和3B能够彼此平滑地连接。因此，可以降低光纤的焊接连接的损失，而不对准光纤的芯。

8. 发明专利

JPS62272210A FUSION SPLICING DEVICE FOR CONSTANT POLARIZING OPTICAL FIBER 失效
公开(公告)号：JPS62272210A
公开(公告)日：1987-11-26
申请号：JP11590386
申请日：1986-05-20
申请人： FUJIKURA LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： ITO KENICHIRO , YAMADA TAKESHI , ONODERA TSUTOMU , YOSHINUMA MIKIO , KATO YASUYUKI
IPC分类号： G02B6/255 , G02B6/38
摘要： PURPOSE:To execute smoothly the rotating aligning of optical fiber cores and to improve control accuracy by constituting the titled device so that the press of only sheath clamps can be released. CONSTITUTION:The optical fiber cores 10 are set up on prescribed positions, pressed by fiber clamps 22 and the sheath clamps 26, and after adjusting the interval between optical fiber 12, pressed by the clamps. Then, the rear part 80 of a lever 56 is depressed like a supposed line. At that time, heads 62 lift the sheath clamps 26 through projections 60 to release the clamps 60. Simultaneously, a rear part horizontal bar 76 is engaged with a hook 74 and the lever 56 is kept at its depressed state. When a lock lever is pressed forward, the hook 74 is disengaged from the bar 76 and the lever 56 is restored to its horizontal state. Since the sheath clamps 26 act as resistors when the optical fiber cores 10 are rotated by rotary mechanisms, the control accuracy can be improved by releasing only the sheath clamps 26.

9. 发明专利

JPS62272207A FUSION SPLICING DEVICE FOR CONSTANT POLARIZATION OPTICAL FIBER 失效
公开(公告)号：JPS62272207A
公开(公告)日：1987-11-26
申请号：JP11590186
申请日：1986-05-20
申请人： FUJIKURA LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： ITO KENICHIRO , YAMADA TAKESHI , ONODERA TSUTOMU , YOSHINUMA MIKIO , KATO YASUYUKI
IPC分类号： G02B6/255 , G02B6/38
摘要： PURPOSE:To improve the centering accuracy of optical fibers by controlling the rotation of motors for rotary mechanisms so that the quenching ratio of polarization mode beams transmitted through both the optical fibers whose axes are matched with each other are maximized or minimized at the projection ends of the beams. CONSTITUTION:The optical fibers are set up on right and left rotary mechanisms and blocks 24, 20, pressed with fiber clamps 22 and sheaths 26 and then pressed with rotary clamps by turning cams. While observing the end faces of the optical fibers 12 through a microscope 90, a dial 48 for the right rotary mechanism is rotated and roughly adjusted by manual operation so that the positions of stress applying parts 18 are made symmetrical or rectangular with/to each other. Then, automatic adjustment is executed in the X and Y directions and the automatic adjustment of a thetadirection is executed by the right rotary mechanism. Namely when the planes of polarization of both the optical fibers are completely coincide with each other or most deviated, the absolute value of the quenching ratio of monitor beams at the projection ends is maximized or minimized and optical power is also changed in accordance with the state of said absolute value, so that the optical power is fed back to a motor 72 to execute automatic adjustment.

10. 发明专利

JPS62272209A FUSION SPLICING DEVICE FOR CONSTANT POLARIZING OPTICAL FIBER 失效
公开(公告)号：JPS62272209A
公开(公告)日：1987-11-26
申请号：JP11590286
申请日：1986-05-20
申请人： FUJIKURA LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： ITO KENICHIRO , YAMADA TAKESHI , ONODERA TSUTOMU , YOSHINUMA MIKIO , KATO YASUYUKI
IPC分类号： G02B6/255 , G02B6/38
摘要： PURPOSE:To shorten aligning time by rough aligning by roughly aligning a double refraction axis by manual operation while observing the end faces of optical fiber cores by a microscope. CONSTITUTION:A butting rod 50 is lifted to the upper stage. The optical fiber cores 10 are set up on prescribed positions and pressed by fiber clamps 26 and sheath clamps 30. Then, the right and left optical fibers 10 are advanced and abutted upon the abutting rod 50 to determine the interval between the fiber cores 10 at the start of fusing. Then, the abutting rod 50 is descended up to the lower stage. Fine electrostatic discharge is instantaneously executed to expose the end faces of the optical fiber cores 10 to high heat so that stress applying parts 18 are easily observed. Then the rod 50 is lifted up to the intermediate stage. The optical fiber cores 10 are clamped by rotary clamps 39, and while observing the stress applying parts 18 by the microscope 62, a dial 46 is manually rotated to execute rough adjustment of the parts 18. Then, the rod 50 is descended up to the lower stage. Optical fibers 12 are adjusted in the Z, X and Y directions and then the theta axis is automatically centered to execute discharge fusion. Since the automatic adjustment is executed after the rough adjustment, the adjusting time can be shortened.

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