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36 条记录 (耗时 0.01 秒)

    Formation of gratings in polymer-coated optical fibers
    25.
    发明公开
    Formation of gratings in polymer-coated optical fibers 失效
    Gittererzeugung在Polymer-beschichteten optischen Fasern

    公开(公告)号：EP0762158A1

    公开(公告)日：1997-03-12

    申请号：EP96305793.0

    申请日：1996-08-07

    申请人： AT&T Corp.

    发明人： Aspell, Jennifer ,  Inniss, Daryl ,  Kuck, Valerie Jeanne ,  Paczkowski, Mark Anthony ,  Simoff, Debra Ann

    IPC分类号： G02B6/16

    CPC分类号： G02B6/02142 ,  G02B6/02133 ,  G02B6/02138 ,  G02B2006/02161 ,  Y10S430/162

    摘要： Recognizing the rate-determining nature of the coating removal and recoating steps, applicants have demonstrated that with proper combination of low absorbing polymer, glass and low intensity radiation, UV-induced gratings can be side-written into polymer coated fibers without removing the polymer, thus permitting the possibility of high speed fabrication of fiber gratings.
    FIG.2, which shows typical apparatus for practicing the method, includes a typical fiber (20) comprising a core (21), a cladding (22) surrounding the core, and an outer polymer coating (23).
    UV light from laser (24) passes through mask (25) the polymer coating (23), and the cladding (22) to write a pattern of index changes along the photosensitive core (21). Alternatively, the pattern can be defined by two interfering beams of UV radiation. The UV radiation should be at a sufficiently low intensity that it does not seriously damage the polymer coating.
    A methylsilsesquioxane-coated fiber treated with D 2 was exposed to UV light from a KrF excimer laser. An amplitude mask was used to produce long period gratings. The fiber was held taut to the amplitude mask, and its side adjacent to the mask was exposed to the UV radiation. At 130mJ/cm 2 1 dB loss developed at the selected wavelength after exposure for approximately 5 mintues. Examination of the fiber surface showed some physical damage to the polymer with periodicity comparable to the amplitude mask, but the coating remained intact and the damage appeared superficial. Decreasing the power to 100 mJ/cm 2 resulted in 0.5 dB loss, and minor damage to the surface of the polymer.

    摘要翻译： 认识到涂层去除和重涂步骤的速率确定性质，申请人已经证明，通过适当组合低吸收聚合物，玻璃和低强度辐射，UV诱导光栅可以侧向写入聚合物涂覆的纤维中而不除去聚合物， 从而允许高速制造光纤光栅的可能性。 图2示出了用于实施该方法的典型装置，包括典型的纤维（20），其包括芯（21），围绕芯的包层（22）和外聚合物涂层（23）。 来自激光（24）的紫外光通过聚合物涂层（23）的掩模（25）和包层（22）沿着感光芯（21）写入折射率变化的图案。 或者，该图案可以由UV辐射的两个干涉光束来限定。 UV辐射应具有足够低的强度，使其不会严重损坏聚合物涂层。 用D2处理的甲基倍半硅氧烷涂覆的纤维暴露于来自KrF准分子激光的UV光。 使用幅度掩模来产生长周期光栅。 纤维被拉紧到幅面掩模上，并且其与掩模相邻的一侧暴露于UV辐射。 在暴露约5分钟后，在所选波长处产生130mJ / cm 2的1dB的损耗。 纤维表面的检查显示出与振幅掩模相当的周期性的聚合物的一些物理损伤，但是涂层保持完整并且损伤看起来是表面的。 将功率降低到100mJ / cm 2导致0.5dB的损耗，并且对聚合物的表面造成轻微损坏。

    TEMPERATURE SENSOR
    26.
    发明公开
    TEMPERATURE SENSOR 审中-公开

    公开(公告)号：EP3245506A1

    公开(公告)日：2017-11-22

    申请号：EP15877380.4

    申请日：2015-01-14

    申请人： The University of Adelaide

    发明人： WARREN-SMITH, Stephen ,  MONRO, Tanya

    IPC分类号： G01N21/41 ,  G02B6/00

    CPC分类号： G01K11/3206 ,  G02B6/0208 ,  G02B6/02123 ,  G02B6/02314 ,  G02B6/02366 ,  G02B2006/02161

    摘要： A temperature sensor and temperature sensing system for sensing changes m temperature up to a predetermined temperature is disclosed. The temperature sensor includes a microstructured optical fiber where the micro-structured optical fiber includes a plurality of longitudinal channels extending along the microstructured optical fiber. The sensor also includes a fiber Bragg grating formed in the microstructured optical, fiber by generating a periodic modulation in the refractive index along a core region of the microstructured optical fiber. The fiber Bragg grating is operable to produce band reflection at a reflection wavelength that varies in accordance with changes in temperature at the core region of the optical fiber.

    FIBER GRATING, ITS MANUFACTURING METHOD AND ITS MANUFACTURING DEVICE
    27.
    发明公开
    FIBER GRATING, ITS MANUFACTURING METHOD AND ITS MANUFACTURING DEVICE 审中-公开
    纤维网格，生产过程中产生设备

    公开(公告)号：EP1035425A4

    公开(公告)日：2005-12-28

    申请号：EP98955930

    申请日：1998-11-25

    申请人： MITSUBISHI CABLE IND LTD

    发明人： IMAMURA KAZUO ,  NAKAI TADAHIKO ,  SUDO YASUHIDE

    IPC分类号： G02B6/02 ,  G02B6/10 ,  G02B5/18

    CPC分类号： G02B6/02138 ,  G02B2006/02161

    摘要： A highly reliable fiber grating and its manufacturing method, wherein: as a core (2), in addition to Ge of an ordinary concentration equivalent to the concentration of the core of a connection object optical fiber, a core co-doped with Sn and Al of predetermined concentrations is employed; a primary covering layer (4) made of ultraviolet ray transmitting resin which transmits an ultraviolet ray with a wavelength of 240 nm - 270 nm and, on the other hand, absorbs an ultraviolet ray with a wavelength in wavelength regions shorter than 240 nm and longer than 270 nm to be cured is applied to the core and the glass part (F) of a cladding (3); a grating is written by applying an ultraviolet ray to the outside of the primary covering layer; and a secondary covering layer (7) made of resin which has a negative linear expansion coefficient so as to cancel and suppress the elongation and contraction caused by the positive linear expansion coefficient of the glass part involving temperature change is applied to the primary covering layer; whereby the grating can be written without causing the deterioration of transmission characteristics and, in addition, both the transmission characteristics and mechanical characteristics can be satisfied at the same time while the improvement of productivity is not obstructed and, moreover, temperature characteristics can be stabilized.