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1. 发明专利

JPS5726810A Optical fiber 失效
标题翻译：光纤
公开(公告)号：JPS5726810A
公开(公告)日：1982-02-13
申请号：JP10179080
申请日：1980-07-23
申请人： Nippon Telegr & Teleph Corp
发明人： KITAYAMA KENICHI , AOUMI YOSHIYUKI
IPC分类号： H01P3/16 , G02B6/024 , G02B6/10
CPC分类号： G02B6/105
摘要： PURPOSE:To obtain an optical fiber having a core of a true circle by which a polarization direction of the lowest degree mode HE11 is kept constant, by varying a refractive index distribution of a core or a clad of an optical fiber, or both of them, in the circumferential direction. CONSTITUTION:Two optical fiber base material of core parts 1a, 1b whose refractive index is different with each other are combined so as to divide equally an angle to the core center into 4 parts, a new base material is manufactured, and it is drawn and is made an optical fiber 1. An even mode and an odd mode which are propagated in this core 1 and have polarization directions falling at right angles with each other, of the lowest degree mode HE11 cause a difference in a propagation constant and do not cause coupling between both the modes, therefore, the polarization direction of the HE11 mode is kept constant, and also the core 1 becomes a true circle.
摘要翻译：目的：通过改变光纤的芯或包层的折射率分布，或者两者都获得具有真圆的核心的光纤，其中最低度模式HE11的偏振方向保持恒定，在圆周方向。构成：将折射率彼此不同的芯部1a，1b的两个光纤基材组合成与核心中心等角度分成4个部分，制造新的基材，并将其拉伸被制成光纤1.在该芯1中传播并且具有彼此成直角的极化方向的偶模和奇模在最低度模式HE11中引起传播常数的差异，并且不会引起两种模式之间的耦合，因此，HE11模式的极化方向保持恒定，并且核心1也成为真正的圆。

2. 发明专利

JPS5724906A Connecting method for optical fiber by melt-sticking 失效
标题翻译：通过胶粘连接光纤的连接方法
公开(公告)号：JPS5724906A
公开(公告)日：1982-02-09
申请号：JP9930580
申请日：1980-07-22
申请人： Nippon Telegr & Teleph Corp
发明人： AOUMI YOSHIYUKI , OOHASHI MASAHARU
IPC分类号： G02B6/24 , G02B6/255
CPC分类号： G02B6/2551
摘要： PURPOSE:To connect two fibers different in refractive index of the cores with a low loss by heating more strongly a fiber with higher refractive index of a core than a fiber with lower refractive index of a core. CONSTITUTION:A fiber 6 with higher refractive index of a core is allowed to contact with a fiber 7 with lower refractive index of a core and the connection. Central line 8 and an electrode central line 9 of discharging electrodes 1, 2 are shifted in their positions such that the fiber 6 having higher refractive index of a core is more strongly heated. When an optical fiber is heated, the refractive index becomes generally small, so by an execution of a discharge connection with such arrangement a refractive index change near a connection point becomes gentle, thus a connection with a low loss becomes possible. Further constitution in the invention can be also used for connecting optical fibers different in melting temperature.
摘要翻译：目的：通过对具有较高折射率芯的纤维具有较高折射率的纤维进行更强烈的加热，从而以较低的损耗连接两芯纤维的折射率不同的纤维。构成：使具有较高折射率的芯的纤维6与具有较低折射率的芯和连接的纤维7接触。中心线8和放电电极1,2的电极中心线9在它们的位置移动，使得具有较高折射率的芯的纤维6被更强烈地加热。当光纤被加热时，折射率通常变小，因此通过这种布置的放电连接的执行，连接点附近的折射率变化变得平缓，因此可以实现低损耗的连接。本发明的另外的结构也可以用于连接熔融温度不同的光纤。

3. 发明专利

JPS5724901A Optical fiber scratching device 失效
标题翻译：光纤切割装置
公开(公告)号：JPS5724901A
公开(公告)日：1982-02-09
申请号：JP9930480
申请日：1980-07-22
申请人： Nippon Telegr & Teleph Corp
发明人： OOHASHI MASAHARU , AOUMI YOSHIYUKI , UCHIDA NAOYA
IPC分类号： G02B6/00 , G02B6/25
CPC分类号： G02B6/25
摘要： PURPOSE:To obtain an optical fiber scratching device by which a good cross section like a mirror surface is obtained by scratching uniformly an optical fiber from many directions. CONSTITUTION:A rotatable ratary ring 6 is arranged on a disc 5 having a slightly larger hole than a diameter of an optical fiber at the center and into this hole an optical fiber 2 to be cut is inserted. On the disc 5 a guide 14 having a fiber scratching mechanism part 9 is installed through a screw 13 and a spring 12 for adjusting blade pressure and on its tip part a cutter 8 comprising a diamond, etc., is placed. On the ring 6 a cam 15 like a triangle is installed with screws 16, 17. When the ring 6 is rotated, the triangular cam 15 forces down the fiber scratching mechanism part 9, and with the cutter 8 the optical fiber 2 is scratched. Blade pressure applied to the fiber 2 is adjusted with spring 10, 12 for blade pressure adjustment.
摘要翻译：目的：为了获得通过从多个方向均匀地划分光纤而获得像镜面的良好横截面的光纤划痕装置。构成：可旋转的圆环6布置在具有比中心处的光纤的直径稍大的孔的盘5上，并且插入到该孔中，插入待切割的光纤2。在盘5上，具有纤维刮擦机构部分9的引导件14通过螺钉13和用于调节叶片压力的弹簧12安装，并且在其末端部分上设置有包括钻石等的切割器8。在环6上，具有三角形的凸轮15安装有螺钉16,17。当环6旋转时，三角形凸轮15迫使纤维刮擦机构部分9下降，并且随着切割器8，光纤2被刮伤。用弹簧10,12调节施加到纤维2上的叶片压力，用于叶片压力调节。

4. 发明专利

JPS5740216A Molten connection method of single mode transmission type optical fiber 失效
标题翻译：单模传输型光纤的连接方式
公开(公告)号：JPS5740216A
公开(公告)日：1982-03-05
申请号：JP11561580
申请日：1980-08-22
申请人： Fujikura Ltd , Furukawa Electric Co Ltd:The , Nippon Telegr & Teleph Corp , Sumitomo Electric Ind Ltd
发明人： KATOU YASUYUKI , TATSUTA MITSUHIRO , AOUMI YOSHIYUKI , KOKAYU MIKIO , YANAGAWA HISAHARU , TODA YUUICHI , WATANABE ATOU
IPC分类号： G02B6/24 , G02B6/255
CPC分类号： G02B6/2551
摘要： PURPOSE:To fix approximate shaft matching status in its early stages by setting up the melting areas of the top parts of both optical fibers to 0.1-0.3mm. and specifying discharge current and the pushing degree of the top portions when the single mode transmission type optical fibers are melted and connected by an ordinary method. CONSTITUTION:Optical fibers 3A and 3B to be connected are opposed on the same axial line and, after setting up a minor interval G, a pair of discharge electrodes 4A and 4B start discharging. At the time, the interval between the electrodes 4A and 4B is set up to
摘要翻译：目的：通过将两根光纤顶部的熔化面积设置为0.1-0.3mm，在早期阶段固定大致的轴匹配状态。并且当通过常规方法熔化和连接单模式透射型光纤时，指定放电电流和顶部的推压度。构成：要连接的光纤3A和3B在相同的轴线上相对，并且在设置较小间隔G之后，一对放电电极4A和4B开始放电。此时，电极4A和4B之间的间隔设置为<= 1.0mm，放电电流为13-16mA，光纤顶部的推压度为3-15μm。在上述条件下，熔化面积为0.2-0.3mm，非常窄。由于光纤3A和3B的顶部部分在狭窄的区域同心地被加热和熔化，所以在低的程度上抑制了芯的变形，防止了由于表面张力引起的外部形状的混合，并且在其中固定了大致的轴匹配早期阶段。

5. 发明专利

JPS5737304A Optical fiber 失效
标题翻译：光纤
公开(公告)号：JPS5737304A
公开(公告)日：1982-03-01
申请号：JP11159980
申请日：1980-08-15
申请人： Nippon Telegr & Teleph Corp
发明人： KITAYAMA KENICHI , KATOU YASUYUKI , AOUMI YOSHIYUKI
IPC分类号： H01P3/16 , G02B6/028
CPC分类号： G02B6/0288
摘要： PURPOSE:To obtain an extremely wide transmission band by setting a refractive index distribution within a specific range and so selecting standardization frequency that the group delay times of the lowest order mode and the 2nd high order mode groups are made roughly equal with respect to the used wavelength. CONSTITUTION:When the radius of a core is defined as (a), the refractive index of the core center as n1, the refractive index of clad as n2, the specific refractive index difference between the core and clad as DELTA, the distance in a radial direction from the core center as (r), the refractive index distribution in the core as n(r)= n1[1-2DELTA(r/2)alpha]1/2, the wavelength used as lambda, and standardization frequency as v=2pi/lambda.n12(2DELTA)1/2, the alpha is set at 2.3-3.1 and the (v) value is so selected that the group delay times of the lowest order mode and 2nd high order mode groups are made roughly equal with respect to the used wavelength lambda. Therefore, an extremely wide transmission band is obtained, the core diameter is enlarged to more than twice as compared to conventional single mode optical fibers, and the joining with a light source is made easy.
摘要翻译：目的：为了通过将折射率分布设定在特定范围内来获得非常宽的传输频带，因此选择最低阶模式和第二高阶模式组的组延迟时间的标准化频率相对于所使用的大致相等波长。构成：当芯的半径定义为（a）时，芯心的折射率为n1，包层的折射率为n2，芯与包层之间的比折射率差为DELTA，从芯心的径向方向为（r），芯的折射率分布为n（r）= n1 [1-2DELTA（r / 2）] 1/2，用作λ的波长，标准化频率为 v = 2pi / lambda.n12（2DELTA）1/2，α设置在2.3-3.1，并且（v）值被选择为使得最低阶模式和第二高阶模式组的组延迟时间大致相对于使用的波长λ。因此，与传统的单模光纤相比，获得了非常宽的传输带，使芯直径扩大到两倍以上，并且与光源的接合变得容易。

6. 发明专利

JPS5732404A Optical fiber of lower mode 失效
标题翻译：下模光纤
公开(公告)号：JPS5732404A
公开(公告)日：1982-02-22
申请号：JP10652780
申请日：1980-08-01
申请人： Nippon Telegr & Teleph Corp
发明人： KITAYAMA KENICHI , KATOU YASUYUKI , AOUMI YOSHIYUKI
IPC分类号： H01P3/16 , G02B6/028
CPC分类号： G02B6/03627 , G02B6/0288
摘要： PURPOSE:To facilitate manufacture and designing of an optical fiber of double- layer structure which has a core whose refractivity decreases uniformly from its center part to its outside and constant-refractivity cladding outside of the core, by making the optical fiber meet prescribed requirements. CONSTITUTION:The refractivity of the center of a core, that of cladding, and a difference in specific refractivity are denoted as (n), n2 and DELTA, and the radius of the core, wavelength, and constants are also denoted as (a), lambda, and alpha and rho. Then, refractivity at a position (r) away from the core center is determined as shown by expressions I-IV. Further, the cutting V value of mode LP11 and that of mode LP21 are denoted as Vc11 and Vc21, and values of alpha, rho, n1, DELTA, lambda, and (a) are set in expressions V, VI and VII.
摘要翻译：目的：通过使光纤符合规定的要求，便于制造和设计双层结构的光纤，其核心的折射率从其中心部分到外部均匀地减小，并且在芯外部具有恒定折射率包层。构成：芯的中心的折射率，包层的折射率和比折射率的差异表示为（n），n2和DELTA，芯的半径，波长和常数也表示为（a），lambda，alpha和rho。然后，如表达式I-IV所示，确定离核心中心位置（r）的折射率。此外，模式LP11的切割V值和模式LP21的切割V值被表示为Vc11和Vc21，并且α，rho，n1，DELTA，λ和（a）的值被设置在表达式V，VI和VII中。

7. 发明专利

JPS6118935A Generating method of visible light 失效
标题翻译：可见光的产生方法
公开(公告)号：JPS6118935A
公开(公告)日：1986-01-27
申请号：JP13893984
申请日：1984-07-06
申请人： Nippon Telegr & Teleph Corp
发明人： NAKAJIMA TAKASHI , NAKAZAWA MASATAKA , AOUMI YOSHIYUKI
IPC分类号： G02B6/00 , G02B6/024 , G02F1/35 , G02F2/00 , G02F2/02
摘要： PURPOSE:To easily generate visible light of 0.3-1mum by making light pulses of a 1mum wavelength band incident on the fast axis of an optical fiber having birefringence and causing induced Raman scattering and 4 photon mixture and generating a sum frequency in the fiber. CONSTITUTION:Light pulses of high output from an exciting light source 1 are generated at intervals of, for example, 1-10ns as light pulses which have 200psec pulse width and 6kW peak power. The fast axis of polarization of the light pulses is made coincident with the fast axis of the birefringent optical fiber 4 by a polarizer 2 and the output of the polarizer 2 is made incident on the birefringent optical fiber 4 through a lens 3. Nonlinear optical effect, i.e. inductive Raman scattering and 4 photon mixing are caused in the optical fiber 4 to emit visible light (purple of 492nm, green of 514nm, and yellow of 538nm) from a lens 3'. Consequently, the visible light is generated with high efficiency.
摘要翻译：目的：通过使1mum波长带的光脉冲入射到具有双折射的光纤的快轴上并引起诱发的拉曼散射和4光子混合并在光纤中产生和频，容易地产生0.3-1mum的可见光。构成：来自激励光源1的高输出的光脉冲以例如1-10ns的间隔产生，作为具有200psec脉冲宽度和6kW峰值功率的光脉冲。光脉冲的快速偏振轴通过偏振器2与双折射光纤4的快轴一致，并且偏振器2的输出通过透镜3入射到双折射光纤4上。非线性光学效应即在光纤4中产生感应拉曼散射和4光子混合，从透镜3'发射可见光（492nm的紫色，514nm的绿色，538nm的黄色）。因此，以高效率产生可见光。

8. 发明专利

JPS619606A Improvement of extinction ratio of optical fiber and communication equipment utilizing said fiber 失效
标题翻译：改进光纤退出率和使用光纤的通信设备
公开(公告)号：JPS619606A
公开(公告)日：1986-01-17
申请号：JP13075284
申请日：1984-06-25
申请人： Nippon Telegr & Teleph Corp
发明人： KITAYAMA KENICHI , KIMURA YASUROU , AOUMI YOSHIYUKI
IPC分类号： G02B6/00 , G02B6/024
摘要： PURPOSE:To improve the extinction ratio of the signal light inputted to an optical fiber having the diffenct refractive indices in orthogonal optical main axis directions in such a manner that the polarization plane thereof coincides with the short axis by making pump light incident on said optica fiber while making the plane of polarization thereof coincident with the long axis. CONSTITUTION:A signal light source 1 outputs polarized signal light to the short axis of a polarization maintaining optical fiber 6 and a pump light source 2 outputs polarized pump light to the long axis of the fiber 6. The mode of the pump light is preferably the waveguide mode of the lowest order propagating in the fiber 6. The wavelengths mode of the lowest order propagating in the fiber 6. The wavelengths of the signal light and pump light may be equal or different. The signal light is transmitted through a dichroic reflecting mirror 4 an is made incident on the fiber 6. The pump light is reflected by a total reflecting mirror 3 and the mirror 4 and is made incident on the fiber 6. The pump light component is separated and removed by a polarizer 7 at the output end of the fiber 6.
摘要翻译：目的：通过使泵浦光入射到所述光导纤维上，来提高输入到具有正交光轴方向上的差异折射率的光纤的信号光的消光比，使得其偏振面与短轴重合同时使其偏振平面与长轴一致。构成：信号光源1将偏振信号光输出到保偏光纤6的短轴，泵浦光源2将偏振的泵浦光输出到光纤6的长轴。泵浦光的方式优选为在光纤6中传播的最低阶的波导模式。在光纤6中传播的最低阶的波长模式。信号光和泵浦光的波长可以相等或不同。信号光通过二向色反射镜4透射入射到光纤6上。泵浦光被全反射镜3和反射镜4反射并入射到光纤6上。泵浦光分量被分离并且通过在光纤6的输出端处的偏振器7去除。

9. 发明专利

JPS5782740A Measuring method for connection loss of optical fiber 失效
标题翻译：光纤连接损失的测量方法
公开(公告)号：JPS5782740A
公开(公告)日：1982-05-24
申请号：JP13547081
申请日：1981-08-31
申请人： Nippon Telegr & Teleph Corp
发明人： TATSUTA MITSUHIRO , MATSUMOTO MICHITO , TOKUDA MASAMITSU , AOUMI YOSHIYUKI , YOSHIDA KOUJI
IPC分类号： G01M11/02 , G01M11/00 , G02B6/00 , G02B6/24
CPC分类号： G01M11/31
摘要： PURPOSE:To measure the loss of connection while considering directivity by making optical pulses incidence to an optical fiber including connection points and by measuring the power of reflected pulses from the terminal surface of the optical fiber before and after connection. CONSTITUTION:The power P7 of optical pulses from the terminal of an optical fiber 2 is measured by an optical-pulse detection part 10. Then when the transmittivity of an optical powder when an optical beam is emitted from the fiber 2 to the air is gamma and the reflectivity of a half-mirror 8 is beta, P7=P1gamma (1-gamma)beta. An optical fiber 3 is conneced to the optical fiber 2 and a light power P13 of optical pulses from the terminal surface of the optical fiber 2 is measured by an optical-pulse detector 10. Then when the optical transmittivity from the fiber 2 to the fiber 3 and that from the fiber 3 to the fiber 2 are t1 and t2, P13= P1gamma (1-gamma)t1t2beta. Therefore, P13/P7=t1t2, so alpha1=(-10/2)log10P13/P7, where alpha1 is the mean bilateral connection loss of the connection point between the optical fibers 2 and 3. For this purpose, P7 and P13 are measured to obtain the connection loss while considering the directivity.
摘要翻译：目的：通过使光脉冲入射到包括连接点的光纤并通过在连接之前和之后测量来自光纤的端子表面的反射脉冲的功率来考虑方向性来测量连接的损耗。构成：通过光脉冲检测部10测定光纤2的端子的光脉冲的功率P7。然后，当将光束从光纤2发射到空气时的光学粉末的透射率为γ 半反射镜8的反射率为β，P7 = P1gamma2（1-gamma）β。光纤3与光纤2连接，通过光脉冲检测器10测定来自光纤2的端面的光脉冲的光功率P13。然后，当从光纤2到光纤2的光透射率 3，从纤维3到纤维2的是t1和t2，P13 = P1gamma2（1-gamma）t1t2beta。因此，P13 / P7 = t1t2，因此α1=（ - 10/2）log10P13 / P7，其中α1是光纤2和3之间的连接点的平均双向连接损耗。为此，测量P7和P13 在考虑方向性的同时获得连接损耗。

10. 发明专利

JPS5764703A Optical fiber 失效
标题翻译：光纤
公开(公告)号：JPS5764703A
公开(公告)日：1982-04-20
申请号：JP14055280
申请日：1980-10-09
申请人： Nippon Telegr & Teleph Corp , Sumitomo Electric Ind Ltd
发明人： AOUMI YOSHIYUKI , KUKIDA JIYUUZOU , YOSHIMURA KOUZOU , MATSUDA HIROO , HATSUTORI YASUJI , WATANABE MINORU
IPC分类号： C03C25/10 , G02B6/44
CPC分类号： C03C25/106
摘要： PURPOSE:To improve low temperature resistance and heat resistance of optical fibers and prevent them from troubles such as the increment of diameter and nonflexibility without the incorporation of a water cooling material by coating them with aromatic polyimide or aromatic polyamide-imide synthetic resin. CONSTITUTION:Immediately after rolling the base material 1 of an optical fiber while heating it with heaters 2, a optical fiber 1' is coated with aromatic polyimide or aromatic polyamide-imide synthetic resin by a coating die 3. The synthetic resin covering the optical fiber is baked by a baking furnace 5 to form a protecting layer and then wound up by a winder 6. The thickness of the protecting layer is regulated to about 20mu. Thus obtained flexible optical fiber with an appropriate diameter can be used in the wide temperature range of about -269-+400 deg.C and resists frames up to about 800 deg.C. The optical fiber has also superior chemical resistance and radiation resistance.
摘要翻译：目的：提高光纤的耐低温性和耐热性，防止光纤增加直径和不挠性等问题，而不需要用芳香族聚酰亚胺或芳香族聚酰胺酰亚胺合成树脂涂布水冷却材料。构成：在用加热器2加热光纤的同时滚动基材1之后，通过涂布模3将芳香族聚酰亚胺或芳香族聚酰胺酰亚胺合成树脂涂布在光纤1'上。覆盖光纤的合成树脂通过烘焙炉5烘烤以形成保护层，然后由卷绕机6卷绕。保护层的厚度被调节到约20mu。如此获得的具有适当直径的柔性光纤可以在大约-269- + 400摄氏度的宽温度范围内使用，并且抗高达约800摄氏度的框架。光纤也具有优异的耐化学性和耐辐射性。

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