Method of manufacturing a monomode fluoride optical fiber, and an optical amplifier using such a fiber
    1.
    发明授权
    Method of manufacturing a monomode fluoride optical fiber, and an optical amplifier using such a fiber 失效
    单模氟化物光纤的制造方法以及使用这种纤维的光放大器

    公开(公告)号:US06626011B2

    公开(公告)日:2003-09-30

    申请号:US09068540

    申请日:1998-05-13

    IPC分类号: C03B37027

    摘要: The invention provides a monomode optical fiber and a monomode preform (2) having a mother preform (22) housed in an outer sleeve tube (20). It is characterized in that it also includes an intermediate tube (21) between the mother preform (22) and the outer tube (20), the intermediate tube (21) possessing viscosity at fiber-drawing temperature which is less than the viscosity(ies) at fiber-drawing temperature of the mother preform (22) and of the outer tube (20). The invention also provides a method of manufacturing a monomode optical fiber. The fiber has a core that is better centered and less deformed than in the prior art. An application of the invention lies in making an optical amplifier.

    摘要翻译: 本发明提供一种单模光纤和一个单模预制件(2),其具有容纳在外套管(20)中的母母(22)。 其特征在于,它还包括在母体预制件(22)和外管(20)之间的中间管(21),中间管(21)在纤维拉伸温度下具有小于粘度的粘度 )在母体预制件(22)和外管(20)的纤维拉伸温度下。 本发明还提供了制造单模光纤的方法。 纤维具有比现有技术更好的中心并且变形较小的芯。 本发明的应用在于制造光放大器。

    Optical fiber for light amplifier
    3.
    发明授权
    Optical fiber for light amplifier 失效
    光放大器用光纤

    公开(公告)号:US06347177B1

    公开(公告)日:2002-02-12

    申请号:US09417058

    申请日:1999-10-13

    IPC分类号: G02B600

    摘要: An optical fiber used for an optical amplifier, is formed by doping glass with rare-earth ions. Both praseodymium ions (Pr+3) and erbium ions (Er+3) are used as the rare-earth ions, and the glass is a fluoride glass or a sulfide glass. The optical fiber can be used at wavelengths of both 1.3 &mgr;m and 1.55 &mgr;m. The light amplification efficiency of an optical amplifier made of the optical fiber can be improved compared to that of an optical amplifier formed of only Pr+3 or only Er+3.

    摘要翻译: 用于光放大器的光纤通过用稀土离子掺杂玻璃形成。 使用镨离子(Pr + 3)和铒离子(Er + 3)作为稀土离子,玻璃是氟化物玻璃或硫化物玻璃。 光纤可以在1.3μm和1.55μm的波长下使用。 与仅由Pr + 3或仅Er + 3形成的光放大器相比,可以提高由光纤制成的光放大器的光放大效率。

    Current measuring method and device
    4.
    发明申请
    Current measuring method and device 审中-公开
    电流测量方法和装置

    公开(公告)号:US20010009364A1

    公开(公告)日:2001-07-26

    申请号:US09776487

    申请日:2001-02-02

    IPC分类号: G01R031/00

    CPC分类号: C03C13/042 G01R15/246

    摘要: A method of determining the magnitude of an exceptionally large current which comprises measuring the angle of rotation of polarized light in a magnetic field created by the current with a glass fiber sensor composed of a fluoride glass having a low Verdet constant and a photoelastic coefficient not over about 0.25 (nm/cm)/(kg/cm2).

    摘要翻译: 一种确定特大电流的大小的方法,其特征在于,测量由电流产生的磁场中的偏振光的旋转角度,该玻璃光纤传感器由玻璃纤维传感器构成,该玻璃纤维传感器由具有低维尔德常数和光弹性系数的氟玻璃组成 约0.25(nm / cm)/(kg / cm 2)。

    Method for manufacturing halide glass optical fiber
    8.
    发明授权
    Method for manufacturing halide glass optical fiber 失效
    制造卤化物玻璃光纤的方法

    公开(公告)号:US4898603A

    公开(公告)日:1990-02-06

    申请号:US223185

    申请日:1988-07-25

    申请人: Joseph J. Hutta

    发明人: Joseph J. Hutta

    IPC分类号: C03B37/023 C03C13/04

    摘要: A halide glass core fiber is clad by providing two melts that selectively join to form the molten clad fiber in a temperature range from 580.degree. C. to 600.degree. C. A separate heating means controls the fiber melt at the die nozzle. Because of the low viscosity and the narrow proto congelation temperature zone, the clad fiber is extruded and drawn in the vertical direction counter the effect of gravity.

    摘要翻译: 通过在580℃至600℃的温度范围内提供选择性地接合以形成熔融包覆纤维的两种熔体来包覆卤化物玻璃芯纤维。单独的加热装置控制在模头喷嘴处的纤维熔体。 由于低粘度和狭窄的原始凝结温度区,包层纤维在垂直方向上被挤出和拉伸以抵抗重力的影响。

    Halide fibre with high numerical aperture
    10.
    发明授权
    Halide fibre with high numerical aperture 失效
    具有高数值孔径的卤化物纤维

    公开(公告)号:US4836643A

    公开(公告)日:1989-06-06

    申请号:US151677

    申请日:1988-02-02

    IPC分类号: C03C3/32 C03C13/04

    CPC分类号: C03C3/325 C03C13/042

    摘要: A high numerical aperture optical fibre, e.g. for use in remote spectroscopy, has a cladding of a halide glass which contains Hf and a core of a halide glass which contains Pb. Preferably both glasses contain ZrF.sub.4, BaF.sub.2, LaF.sub.3, AlF.sub.3 and NaF. In addition the cladding contains HfF.sub.4 but no PbF.sub.2 and the core contains PbF.sub.2 but no HfF.sub.4.