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1. 发明授权

US06427044B1 Optical fiber 失效
标题翻译：光纤
公开(公告)号：US06427044B1
公开(公告)日：2002-07-30
申请号：US09585337
申请日：2000-06-02
申请人： Eiji Yanada , Yuichi Ohga , Masashi Onishi
发明人： Eiji Yanada , Yuichi Ohga , Masashi Onishi
IPC分类号： G02B622
CPC分类号： G02B6/03666 , C03B37/027 , C03B37/02745 , C03B37/032 , C03B2201/12 , C03B2201/31 , C03B2203/36 , C03B2205/06 , C03B2205/40 , C03C25/1062 , G02B6/02014 , G02B6/02257 , G02B6/02271 , G02B6/02395 , G02B6/03611 , G02B6/03627 , G02B6/03644
摘要： The present invention relates to an optical fiber comprising a structure which yields a low optical transmission loss even when doped with a high concentration of Ge element and is excellent in reliability for strength. The optical fiber according to the present invention comprises a core region whose maximum value &Dgr;max of relative refractive index difference with respect to silica glass non-intentionally doped with impurities is 0.8% or more, in its diameter direction, a cladding region comprising silica glass non-intentionally doped with impurities or silica glass doped with a predetermined amount of fluorine, and a hermetic coat mainly composed of carbon. In particular, the transmission loss &agr; at a wavelength of 1.55 &mgr;m and the maximum value &Dgr;max satisfy the relationship of: &agr;≦0.131×(&Dgr;max)2−0.214×(&Dgr;max)+0.284 in the optical fiber according to the present invention.
摘要翻译：本发明涉及一种光纤，其包括即使掺杂高浓度的Ge元素也能够获得低的光传输损失，并且强度可靠性优异的结构。根据本发明的光纤包括芯区，其相对折射率差的相对折射率差的最大值相对于未有意掺杂杂质的石英玻璃的直径方向为0.8％以上，包含二氧化硅玻璃非晶的包层区域 - 掺杂有预定量氟的杂质或二氧化硅玻璃以及主要由碳组成的气密涂层。特别地，在1.55μm波长的传输损耗α和最大值DELTAmax满足根据本发明的光纤中的关系：

2. 发明授权

US07194171B2 Dispersion compensating optical fiber, dispersion compensating device, optical transmission line and optical transmission system 有权
标题翻译：色散补偿光纤，色散补偿装置，光传输线路和光传输系统
公开(公告)号：US07194171B2
公开(公告)日：2007-03-20
申请号：US10401606
申请日：2003-03-31
申请人： Masao Tsukitani , Eisuke Sasaoka , Eiji Yanada , Yuichi Ohga
发明人： Masao Tsukitani , Eisuke Sasaoka , Eiji Yanada , Yuichi Ohga
IPC分类号： G02B6/02
CPC分类号： G02B6/03644 , G02B6/02004 , G02B6/02242 , G02B6/02261 , G02B6/03627
摘要： A dispersion compensating optical fiber comprises a minimum wavelength at which an increase amount of an actual loss value with respect to a theoretical loss value is not less than 10 mdB/km in a use wavelength band and on a long wavelength side of the use wavelength band. The actual loss value is measured in a state that the fiber is looped around a bobbin. The minimum wavelength falls within a range of 1,565 to 1,700 nm. This dispersion compensating optical fiber is suitably used for an optical transmission line of a large-capacity high-speed WDM optical transmission system.
摘要翻译：色散补偿光纤包括在使用波长带和使用波长带的长波长侧的实际损耗值相对于理论损耗值的增加量不小于10mdB / km的最小波长。实际损耗值是在纤维环绕绕线管的状态下测量的。最小波长在1,565至1,700nm的范围内。该色散补偿光纤适用于大容量高速WDM光传输系统的光传输线路。

3. 发明授权

US06466721B1 Dispersion compensating optical fiber and optical transmission line 有权
标题翻译：色散补偿光纤和光传输线
公开(公告)号：US06466721B1
公开(公告)日：2002-10-15
申请号：US09618752
申请日：2000-07-18
申请人： Masao Tsukitani , Eisuke Sasaoka , Eiji Yanada , Yuichi Ohga
发明人： Masao Tsukitani , Eisuke Sasaoka , Eiji Yanada , Yuichi Ohga
IPC分类号： G02B622
CPC分类号： G02B6/03644 , G02B6/02019 , G02B6/02261 , G02B6/0228 , G02B6/0281 , G02B6/03627 , G02B6/29377
摘要： The present invention relates to an optical transmission line suitably used for a large-capacity high-speed WDM optical transmission system, and an optical fiber suitably used for such an optical transmission line. The optical transmission line is formed by connecting a single-mode optical fiber (SMF) and a dispersion compensating optical fiber (DCF). The dispersion compensating optical fiber has a dispersion value DDCF (unit: ps/nm/km) and dispersion slope SDCF (unit: ps/nm2/km) falling within the ranges of −82 ≦DDCF≦−29 and 0.0023×DDCF≦SDCF≦0.033+0.0015×DDCF at a wavelength of 1,550 nm, respectively. At the wavelength of 1,550 nm, the transmission loss is 0.5 dB/km or less. Letting LDCF be the length of the dispersion compensating optical fiber, and LSMF be the length of the single-mode optical fiber, the value LDCF/(LDCF+LSMF) in the optical transmission line is 0.2 to 0.4. This optical transmission line can suppress the nonlinear optical phenomenon and is suitable to long-distance large-capacity transmission because the optical transmission line has a small transmission loss and low nonlinear index.
摘要翻译：本发明涉及适用于大容量高速WDM光传输系统的光传输线，以及适用于这种光传输线的光纤。光传输线通过连接单模光纤（SMF）和色散补偿光纤（DCF）而形成。色散补偿光纤具有落在-82 <= DDCF <= - 29和0.0023×DDCF的范围内的色散值DDCF（单位：ps / nm / km）和色散斜率SDCF（单位：ps / nm2 / km） = SDCF <= 0.033 + 0.0015×DDCF，分别为1550nm波长。在1,550nm的波长下，传输损耗为0.5dB / km以下。使LDCF为色散补偿光纤的长度，LSMF为单模光纤的长度，光传输线路中的LDCF /（LDCF + LSMF）值为0.2〜0.4。该光传输线可以抑制非线性光学现象，适用于长距离大容量传输，因为光传输线路传输损耗小，非线性指数低。

4. 发明授权

US06997016B2 Method and apparatus for manufacturing glass tube 失效
标题翻译：制造玻璃管的方法和装置
公开(公告)号：US06997016B2
公开(公告)日：2006-02-14
申请号：US10796052
申请日：2004-03-10
申请人： Tomomi Moriya , Masashi Onishi , Kazuyuki Sohma , Masaaki Hirano , Eiji Yanada , Tadashi Enomoto
发明人： Tomomi Moriya , Masashi Onishi , Kazuyuki Sohma , Masaaki Hirano , Eiji Yanada , Tadashi Enomoto
IPC分类号： C03B23/26 , C03B23/045
CPC分类号： C03B37/01254 , C03B19/1469 , C03B23/045 , C03B23/0493 , C03B23/0496 , Y02P40/57
摘要： Stress exerted on an inner or outer circumferential side of a glass tube 6 is controlled when a glass material 3 is heated and softened by a heating element 41 provided around the glass material 3 and a piercing plug 31 is relatively pressed into a softened region of the glass material 3 to thereby form the glass material 3 into the glass tube 6 gradually. For example, the control of the stress can be carried out by controlling an internal or external pressure of the glass tube 6. As a result, the deformation of the glass tube 6 just after piercing is prevented so that the glass tube 6 can be obtained with high quality. It is also possible to solve the problem that cracks may occur easily at the time of reheating because of residual stress distribution after cooling.
摘要翻译：当玻璃材料3被设置在玻璃材料3周围的加热元件41加热和软化时，控制施加在玻璃管6的内周侧或外周侧上的应力，并且穿孔塞31被相对地压入到玻璃材料3，从而逐渐将玻璃材料3形成到玻璃管6中。例如，可以通过控制玻璃管6的内部或外部压力来进行应力的控制。结果，防止刚刚穿刺之后的玻璃管6的变形，从而能够以高质量获得玻璃管6。也可以解决由于冷却后的残余应力分布而在再加热时容易发生裂纹的问题。

5. 发明授权

US06898361B2 Dispersion-compensating optical fiber and optical transmission line 失效
标题翻译：色散补偿光纤和光传输线
公开(公告)号：US06898361B2
公开(公告)日：2005-05-24
申请号：US10374716
申请日：2003-02-27
申请人： Eiji Yanada , Masaaki Hirano , Masashi Onishi
发明人： Eiji Yanada , Masaaki Hirano , Masashi Onishi
IPC分类号： G02B6/02 , G02B6/16
CPC分类号： G02B6/02261 , G02B6/0228 , G02B6/02285 , G02B6/0286 , G02B6/03611 , G02B6/03627 , G02B6/03644 , G02B6/03666
摘要： There is disclosed a dispersion-compensating optical fiber exhibiting, at a wavelength of 1500 nm, a chromatic dispersion of −30 ps/nm/km or less, a ratio (S/D) of −0.08/nm to +0.05/nm between chromatic dispersion D and dispersion slope S, a polarization mode dispersion of 0.3 ps/km1/2 or less, and a transmission loss of 1 dB/km or less, and an excess loss of 0.2 dB/km or less due to OH group in a wavelength band of 1.4 μm.
摘要翻译：公开了一种色散补偿光纤，其波长为1500nm，色散为-30ps / nm / km以下，在-0.08 / nm〜+ 0.05 / nm之间的比率（S / D）为色散D和色散斜率S，偏振模色散为0.3ps / km 1/2以下，传输损耗为1dB / km以下，超过0.2dB / km以下，由于OH基在1.4μm的波段中。

6. 发明授权

US06836605B2 Optical fiber preform, production method thereof, and optical fiber produced from the preform 有权
标题翻译：光纤预制棒，其制造方法以及由该预制棒制成的光纤
公开(公告)号：US06836605B2
公开(公告)日：2004-12-28
申请号：US10291813
申请日：2002-11-12
申请人： Masaaki Hirano , Eiji Yanada , Masashi Onishi
发明人： Masaaki Hirano , Eiji Yanada , Masashi Onishi
IPC分类号： G02B602
CPC分类号： C03C3/06 , C03B37/01211 , C03B37/01228 , C03B37/01248 , C03B37/0126 , C03B2201/02 , C03B2201/10 , C03B2201/12 , C03B2201/20 , C03B2201/28 , C03B2201/31 , C03B2203/23 , C03B2203/36 , G02B6/02285 , G02B6/03627
摘要： An optical fiber preform having a low core noncircularity and eccentricity for producing an optical fiber having an improved polarization mode dispersion, a method for producing the preform, and an optical fiber produced from the preform. The optical fiber preform is produced by the following steps. Diameter-reduced portions 11a and 11b are formed in the vicinity of the ends of the glass pipe 11. A glass rod 12 is inserted into the glass pipe 11. The glass rod 12 is fixed to the glass pipe 11 at the diameter-reduced portion 11a. The glass pipe 11 and the glass rod 12 are heat-unified from the diameter-reduced portion 11b forward to the diameter-reduced portion 11a. The optical fiber preform has a core noncircularity of at most 1.5%. The optical fiber has a polarization mode dispersion of at most 0.15 ps/km1/2 at a wavelength of 1,550 nm.
摘要翻译：一种具有低芯非圆度和偏心率的光纤预制件，用于制造具有改进的偏振模色散的光纤，由预成型件制造的预制棒的制造方法和光纤。光纤预制棒通过以下步骤制造。直径减小部分11a和11b形成在玻璃管11的端部附近。玻璃棒12插入到玻璃管11中。玻璃棒12在直径减小部分处固定到玻璃管11上 11a。玻璃管11和玻璃棒12从直径减小部分11b向前加热到直径减小部分11a。光纤预制棒的芯非圆度至多为1.5％。该光纤在1,550nm的波长下具有至多0.15ps / km 1/2的偏振模色散。

7. 发明授权

US07062941B2 Manufacturing method of optical fiber preform 有权
标题翻译：光纤预制棒的制造方法
公开(公告)号：US07062941B2
公开(公告)日：2006-06-20
申请号：US10103786
申请日：2002-03-25
申请人： Masashi Onishi , Eiji Yanada , Masaaki Hirano , Hideyuki Ijiri
发明人： Masashi Onishi , Eiji Yanada , Masaaki Hirano , Hideyuki Ijiri
IPC分类号： C03B37/07
CPC分类号： C03B37/01228
摘要： A method for manufacturing an optical fiber preform that can produce an optical fiber having desired characteristics over the longer length thereof. A crude preform provided with a core region and a cladding region is prepared (Step S1), and at a plurality of positions in the longitudinal direction of the crude preform, a refractive index profile in the cross-section of the crude preform is measured (Step S2). Then, the shape of the cladding region is demarcated based on the shape of the profile (Step S3). Subsequently, the crude preform is ground based on the results of the demarcation (Step S4). Thus, an optical fiber preform that enables the manufacture of an optical fiber having target characteristics is manufactured.
摘要翻译：一种光纤预制棒的制造方法，该光纤预制棒可以在其较长的长度上产生具有所需特性的光纤。制备具有芯区域和包层区域的粗制预制件（步骤S1），并且在粗制预型件的纵向方向上的多个位置处，测量粗制预成型体的横截面中的折射率分布（步骤S2）。然后，基于轮廓的形状划定包层区域的形状（步骤S 3）。随后，基于划分的结果研磨粗制预成型件（步骤S4）。因此，制造能够制造具有目标特性的光纤的光纤预制棒。

8. 发明授权

US07010203B2 Optical fiber manufacturing method and optical fiber 失效
标题翻译：光纤制造方法和光纤
公开(公告)号：US07010203B2
公开(公告)日：2006-03-07
申请号：US10479852
申请日：2003-04-03
申请人： Tomoyuki Yokokawa , Eiji Yanada , Masaaki Hirano
发明人： Tomoyuki Yokokawa , Eiji Yanada , Masaaki Hirano
IPC分类号： G02B6/02 , G02B6/22
CPC分类号： G02B6/03694 , C03B37/01211 , C03B37/01892 , C03B2201/03 , C03B2201/07 , C03B2203/22 , C03B2203/36 , G02B6/02261 , G02B6/02271 , G02B6/0228 , G02B6/03644 , G02B6/03666
摘要： An object of the present invention is to provide an optical fiber manufacturing method and an optical fiber in which an increase in the transmission loss is suppressed by preventing hydroxyl group from entering near the core portion.This invention provides a method for manufacturing an optical fiber 10 including forming a glass pipe 16 by applying a ring portion 15 on the inner face of a starting pipe 14 as a starting material, inserting a glass rod 13 that becomes a central core portion 11 and a depressed portion 12 into the inside of the glass pipe 16, integrating the glass pipe 16 and the glass rod 13 by collapse to form a glass body 17, forming a preform 10a by providing a jacket portion 18 outside the glass body 17, and drawing the preform 10a, wherein the thickness of the starting pipe 14 is set in a range from 4 mm to 8 mm.
摘要翻译：本发明的目的是提供一种光纤制造方法和光纤，其中通过防止羟基进入芯部附近而抑制传输损耗的增加。本发明提供了一种制造光纤10的方法，该光纤10包括通过在作为起始材料的起始管14的内表面上施加环形部分15，插入成为中心芯部11的玻璃棒13和在玻璃管16的内部设有凹部12，将玻璃管16和玻璃棒13倒塌形成玻璃体17，通过在玻璃体17的外侧设置护套部18而形成预制件10a; 拉制预制件10a，其中起始管14的厚度设定在4mm至8mm的范围内。

9. 发明授权

US07068901B2 Optical fiber preform producing method, optical fiber production method, and optical fiber 失效
标题翻译：光纤预制棒生产方法，光纤生产方法和光纤
公开(公告)号：US07068901B2
公开(公告)日：2006-06-27
申请号：US10494278
申请日：2003-04-16
申请人： Masaaki Hirano , Eiji Yanada , Tomoyuki Yokokawa , Takashi Sasaki
发明人： Masaaki Hirano , Eiji Yanada , Tomoyuki Yokokawa , Takashi Sasaki
IPC分类号： G02B6/22
CPC分类号： G02B6/03688 , C03B37/01211 , C03B37/0124 , C03B2203/22 , C03B2203/29 , C03B2203/36 , G02B6/02271 , G02B6/03644 , G02B6/03666 , Y02P40/57
摘要： An optical fiber preform comprises a central core portion having a maximal value Nc of refractive index in the center, and outside the central core portion, comprising at least a depressed portion having a minimal value Nd of refractive index, a ring portion having a maximal value Nr of refractive index and an outside cladding layer having a maximal value No of refractive index. The optical fiber preform satisfies a relation of Nc≧Nr>No>Nd among the values of refractive index. A method of the optical fiber preform comprises fabricating a glass rod by inserting a rod containing at least the central core portion into a pipe containing at least the depressed portion and integrating them, fabricating a glass pipe having the ring portion, and fabricating a vitreous body by integrating the glass rod and the glass pipe by collapsing after inserting the glass rod into the glass pipe.
摘要翻译：光纤预制件包括在中心具有折射率最大值Nc并且在中心芯部分外部的中心芯部分，至少包括具有最小折射率Nd的凹陷部分，具有最大值的环部分折射率Nr和折射率最大值No的外包层。光纤预制棒满足折射率值之间的Nc> = Nr> No> Nd的关系。光纤预制棒的方法包括通过将至少包含中心纤芯部分的棒插入到至少包含凹陷部分并将其集成的管中来制造玻璃棒，制造具有该环部分的玻璃管，以及制造玻璃体通过在将玻璃棒插入玻璃管中之后通过塌缩来集成玻璃棒和玻璃管。

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