制造光纤的方法和光纤毛坯

    公开(公告)号:CN1430584A

    公开(公告)日:2003-07-16

    申请号:CN01810099.6

    申请日:2001-05-21

    Inventor: H·法比安

    Abstract: 按照由包芯结构毛坯或由形成包芯结构的几种部件的同轴组件经拉丝来制造光纤的已知方法,采用烟灰沉积法生产芯圆柱,该芯圆柱具有较高折射指数“nk”和外径“dk”的芯玻璃层,它外面包围着有较低折射指数“nM1”和外径“dM1”的第一玻璃包层,然后在芯圆柱外表面施加第二玻璃包层。按照本发明,第二玻璃包层(4)在单独步骤中被制成套管形式,该套管的平均OH浓度最高为1ppm(重量)。第二玻璃包层(4)是通过使套管萎陷到芯圆柱(2;3)上施加的,采用芯圆柱(2;3)使“dM1”/“dk”比介于1~2.2,并且在靠近表面达10μm深度区域内的平均OH浓度最高为1ppm(重量)。

    TITANIA-SILICA GLASS WITH UNIFORM HYDROXYL CONCENTRATION

    公开(公告)号:US20240246850A1

    公开(公告)日:2024-07-25

    申请号:US18411231

    申请日:2024-01-12

    CPC classification number: C03B19/1453 C03B2201/075

    Abstract: A process of forming a titania-silica glass body, the process including exposing a titania-doped silica soot body to a first thermal treatment by heating the body to a first temperature T1 between about 800° C. and about 1100° C. for a first time duration t1 calculated using the equation:






    t

    1

    >


    L
    c
    2


    4

    α



    ,




    wherein Lc is the characteristic length (cm) of the body and α is the thermal diffusivity (cm2/sec) of the body. The process further including exposing the body to a second thermal treatment by heating the body to a second temperature T2 between about 1050° C. and about 1250° C. wherein, after the second thermal treatment, a peak-to-valley difference of hydroxyl concentration amongst a plurality of segments of the body is about 70 ppm or less.

    DISCHARGE LAMP
    120.
    发明申请
    DISCHARGE LAMP 审中-公开

    公开(公告)号:US20190172698A1

    公开(公告)日:2019-06-06

    申请号:US16095909

    申请日:2017-04-12

    CPC classification number: H01J61/30 C03B2201/075 H01J61/04 H01J61/16 H01J61/36

    Abstract: A discharge lamp includes a discharge vessel. A xenon gas is sealed within the discharge vessel so as to serve as a light emitting gas, the discharge vessel is made from quartz glass, a pair of electrodes are arranged so as to face each other in the discharge vessel, and the discharge vessel has a chip portion. The chip portion is made from a glass member that has a composition different from that of the discharge vessel, and the glass member has a transmittance of 50% or more over a wavelength range from 170 nm to 300 nm.

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