Optical fiber preform and the method of producing the same
    91.
    发明申请
    Optical fiber preform and the method of producing the same 有权
    光纤预制棒及其制造方法

    公开(公告)号:US20050214543A1

    公开(公告)日:2005-09-29

    申请号:US10970379

    申请日:2004-10-22

    摘要: An optical fiber preform (1) serving as a material of an optical fiber has a shoulder portion (12) thrusting beyond a middle portion (M) in a base end region (K) which is on the upper side when the optical fiber preform is suspended for a drawing process. The optical fiber preform (1) of this configuration can be easily produced by appropriately setting the heating condition, etc. for the sintering step in the production process. Thus, it is possible to omit the elongating step after the sintering step, thereby simplifying the production process. Further, in the prior-art technique, turbulence is generated in the gas flow in the furnace of the drawing apparatus toward the end of the drawing step, making it impossible to draw in a stable manner. In contrast, in this embodiment, due to the shoulder portion (12), there is a small gap between the inner wall surface of the furnace and the optical fiber preform; due to this small gap, the gas flow is regulated, and the drawing can be conducted in a stable manner even toward the end of the drawing step.

    摘要翻译: 用作光纤材料的光纤预制件(1)具有在光纤预制棒是在上侧的基端部区域(K)中超过中间部分(M)的肩部(12) 暂停绘制过程。 通过在生产过程中适当地设定烧结步骤的加热条件等,可以容易地制造这种结构的光纤预制件(1)。 因此,可以省略烧结步骤后的延伸工序,从而简化了制造工序。 此外,在现有技术中,在拉拔装置的炉内的气流中产生湍流,使得不可能稳定地绘制。 相反,在本实施方式中,由于肩部(12),炉内壁面和光纤预制体之间存在小间隙, 由于这种小的间隙,气流被调节,并且即使在拉拔步骤结束时也可以以稳定的方式进行拉伸。

    Method of making an optical fiber by placing different core tablets into a cladding tube
    92.
    发明授权
    Method of making an optical fiber by placing different core tablets into a cladding tube 失效
    通过将不同的芯片放入包层管来制造光纤的方法

    公开(公告)号:US06434975B2

    公开(公告)日:2002-08-20

    申请号:US08844997

    申请日:1997-04-23

    申请人: George E. Berkey

    发明人: George E. Berkey

    IPC分类号: C03B37027

    摘要: An optical fiber having optical characteristics that systematically vary along its length is made by inserting a plurality of cylindrical tablets into a cladding glass tube and overcladding the tube with particles of cladding glass. Each tablet contains a core region, and it optionally contains a layer of cladding glass Adjacent tablets are capable of forming optical fiber sections having different optical properties. Prior to consolidating the glass particles, chlorine flows through the tube and over the tablets. When the tube begins to sinter, the chlorine flow is stopped and the sintering particles generate an inwardly directed force that causes the tube to collapse inwardly onto the tablets which concurrently become fused to each other. The resultant draw blank can be drawn into a low loss optical fiber. This method is particularly useful for making dispersion managed single-mode optical fibers.

    摘要翻译: 通过将多个圆柱形片剂插入包层玻璃管中并且用包层玻璃颗粒包覆管来制造具有沿其长度系统地变化的光学特性的光纤。 每个片剂含有核心区域,并且其任选地包含一层包层玻璃相邻的片剂能够形成具有不同光学性质的光纤部分。 在固化玻璃颗粒之前,氯气流过管子并流过片剂。 当管开始烧结时,氯气流停止,烧结颗粒产生向内的力,使得管子向内折叠到同时彼此熔合的片剂上。 所得到的拉伸坯料可以被拉入低损耗光纤。 该方法对于制造分散管理单模光纤特别有用。

    Optical fiber
    93.
    发明申请
    Optical fiber 有权
    光纤

    公开(公告)号:US20020051612A1

    公开(公告)日:2002-05-02

    申请号:US09983297

    申请日:2001-10-23

    IPC分类号: G02B006/16

    摘要: The present invention relates to an optical fiber comprising a structure enabling WDM transmissions by utilizing the whole wavelength range of 1300 nm to 1625 nm as a signal wavelength band. In the optical fiber according to the present invention, the transmission loss is 0.4 dB/km or less at a wavelength of 1310 nm, 0.4 dB/km or less at a wavelength of 1383 nm, and 0.3 dB/km or less at a wavelength of 1550 nm. The chromatic dispersion is 0.1 ps/nm/km or more but 5.5 ps/nm/km or less at a wavelength of 1383 nm, and 0.1 ps/nm/km or more but 16.5 ps/nm/km or less in the wavelength range of 1530 nm to 1565 nm. The cut off wavelength at a length of 22 m is 1300 nm or less, and the absolute value of dispersion slope in the wavelength range of 1300 nm to 1625 nm is 0.1 ps/nm2/km or less.

    摘要翻译: 本发明涉及一种包括通过利用1300nm至1625nm的整个波长范围进行WDM传输的结构作为信号波长带的光纤。 在本发明的光纤中,波长1310nm,波长1383nm为0.4dB / km以下,波长为0.3dB / km以下时的传输损失为0.4dB / km以下 为1550nm。 在1383nm的波长下,色散为0.1ps / nm / km以上,5.5ps / nm / km以下,波长范围为0.1ps / nm / km以上,16.5ps / nm / km以下 为1530nm至1565nm。 长度为22μm的截止波长为1300nm以下,在1300nm〜1625nm的波长范围内的色散斜率的绝对值为0.1ps / nm 2 / km以下。

    Optical fiber base material ingot and method for producing the same
    94.
    发明申请
    Optical fiber base material ingot and method for producing the same 审中-公开
    光纤基材锭及其制造方法

    公开(公告)号:US20010054302A1

    公开(公告)日:2001-12-27

    申请号:US09916540

    申请日:2001-07-27

    IPC分类号: C03C019/00

    摘要: There are disclosed a method for producing an optical fiber base material ingot comprising depositing a soot on a starting core member, and subjecting the soot to dehydration, vitrification by sintering, and then cylindrical grinding, wherein the cylindrical grinding is performed while a core portion central axis is brought into line with a rotation axis of cylindrical grinding machine, and an optical fiber base material ingot produced by the method. According to the present invention, there are provided an optical fiber base material ingot having excellent ingot roundness and excellent core portion eccentricity, and a production method capable of producing the optical fiber base material ingot in a short period of time.

    摘要翻译: 公开了一种光纤基材锭的制造方法,其特征在于,在起始芯部上沉积烟灰,并通过烧结对所述烟灰进行脱水,玻璃化,然后进行圆筒磨削,其中,在芯部中心 轴与圆筒磨床的旋转轴线成一直线,以及通过该方法制造的光纤基材锭。 根据本发明,提供一种具有优异的锭状圆度和优异的芯部偏心率的光纤基材锭,以及能够在短时间内制造光纤母材锭的制造方法。

    OPTICAL FIBER AND METHOD OF MANUFACTURING THE SAME
    95.
    发明申请
    OPTICAL FIBER AND METHOD OF MANUFACTURING THE SAME 失效
    光纤及其制造方法

    公开(公告)号:US20010043782A1

    公开(公告)日:2001-11-22

    申请号:US09007798

    申请日:1998-01-15

    摘要: In an optical fiber of this invention, the MFD is increased to effectively suppress the influence of nonlinear optical effects. A method of manufacturing the optical fiber effectively prevents bubble occurrence in a transparent preform, deformation of the preform, and flaws on the preform surface during the manufacture. The optical fiber has, from its center to the peripheral portion, a first core having a first refractive index n1, a second core having a second refractive index n2 ( n3,

    摘要翻译: 在本发明的光纤中,增加MFD以有效地抑制非线性光学效应的影响。 制造光纤的方法有效地防止在制造过程中透明预制件中的气泡发生,预成型件的变形和预型件表面上的缺陷。 光纤从其中心到周边部分具有第一折射率n1的第一纤芯和第二折射率n2( n3,

    Method of making dispersion managed optical fibers
    97.
    发明授权
    Method of making dispersion managed optical fibers 失效
    制造光纤的方法

    公开(公告)号:US06173588B1

    公开(公告)日:2001-01-16

    申请号:US09300894

    申请日:1999-04-28

    IPC分类号: C03B37027

    摘要: An optical fiber having optical characteristics that vary along its length is made by assembling a plurality of cylindrical glass or soot tablets into or along a glass tablet alignment device, then fused into monolithic assembly. If desired, additional glass may be applied to the assembly before or after the fusing step. A vacuum is preferably applied during the fusing step. Each tablet preferably contains a core region, and it optionally contains a layer of cladding glass. Adjacent tablets are capable of forming optical fiber sections having different optical properties. Prior to consolidating the glass particles, chlorine preferably flows through or around the tablets and alignment device. The resultant draw blank can be drawn into a low loss optical fiber having short transition regions between adjacent areas of fiber. This method is particularly useful for making dispersion managed single-mode optical fibers.

    摘要翻译: 具有沿其长度变化的光学特性的光纤通过将多个圆柱形玻璃或烟灰片组装到玻璃片对齐装置中或沿着玻璃片对齐装置而制成,然后熔合成单片组件。 如果需要,可以在熔融步骤之前或之后向组件施加另外的玻璃。 在定影步骤期间优选施加真空。 每个片剂优选地包含核心区域,并且其任选地包含一层包层玻璃。 相邻的片剂能够形成具有不同光学性质的光纤部分。 在固化玻璃颗粒之前,氯优选流过片剂和对准装置中或周围。 所得到的拉伸坯料可以被拉入具有纤维相邻区域之间的短过渡区域的低损耗光纤。 该方法对于制造分散管理单模光纤特别有用。

    Dispersion-shifted fiber
    99.
    发明授权
    Dispersion-shifted fiber 失效
    色散位移光纤

    公开(公告)号:US6072929A

    公开(公告)日:2000-06-06

    申请号:US998425

    申请日:1997-12-24

    IPC分类号: C03B37/014 G02B6/02

    摘要: The present invention aims to provide a dispersion-shifted fiber which can effectively restrain nonlinear optical effects from occurring and has a configuration suitable for long-haul light transmission. The dispersion-shifted fiber has, as various characteristics at a wavelength of 1,550 nm, a dispersion level of 1.0 to 4.5 ps/nm/km in terms of absolute value, a dispersion slope not greater than 0.13 ps/nm.sup.2 /km in terms of absolute value, an effective core cross-sectional area not less than 70 .mu.m.sup.2, and a transmission loss not greater than 0.25 dB/km with respect to light in a 1.55-.mu.m wavelength band.

    摘要翻译: 本发明的目的在于提供一种可以有效地抑制非线性光学效应发生并具有适于长距离透光的结构的色散位移光纤。 色散位移光纤作为波长为1,550nm的各种特性具有以绝对值表示的1.0至4.5ps / nm / km的色散水平,不大于0.13ps / nm 2 / km的色散斜率 相对于1.55μm波段的光,绝对值,有效芯截面积不小于70μm2,传输损耗不大于0.25dB / km。

    Dispersion compensating fiber and its manufacturing method
    100.
    发明授权
    Dispersion compensating fiber and its manufacturing method 失效
    色散补偿光纤及其制造方法

    公开(公告)号:US5802235A

    公开(公告)日:1998-09-01

    申请号:US871811

    申请日:1997-06-09

    申请人: Youichi Akasaka

    发明人: Youichi Akasaka

    摘要: A dispersion compensating fiber is provided which is capable of reducing the birefringence of the core caused in spinning to suppress an increase in polarization mode dispersion due to the birefringence of the core even though the surface of the core rod is ground to shape the profile of the core during manufacturing. A silica glass cladding 2 doped with fluorine is disposed to surround a silica glass core 1 doped with germanium. The variation in circumferential concentration of germanium at the periphery of the core 1 is set at 0.05% or smaller in relative refractive index difference value.

    摘要翻译: 提供了一种弥散补偿光纤,其能够减少纺丝时引起的芯的双折射,以抑制由于芯的双折射引起的偏振模色散的增加,即使芯棒的表面被研磨以形成 核心在制造过程中。 掺杂氟的石英玻璃包层2设置成围绕掺杂有锗的石英玻璃核心1。 芯1周边的锗的周向浓度的变化相对折射率差值为0.05%以下。