中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

108 records (took 0.023 seconds)

    Method of making fluorine/boron doped silica tubes
    81.
    发明公开
    Method of making fluorine/boron doped silica tubes 失效
    Verfahren zum Herstellen von mit Bor- und Fluor-dotierten Silicaglasrohren。

    公开(公告)号：EP0547335A2

    公开(公告)日：1993-06-23

    申请号：EP92118052.7

    申请日：1992-10-22

    Applicant: Corning Incorporated

    Inventor： Carpenter, Norman Willard, Corning Incorporated ,  Young, Donald Ray, Jr., Corning Incorporated ,  Morrow, Alan John, Corning Incorporated

    IPC: C03B37/014 ,  C03B32/00 ,  G02B6/28

    CPC classification number: G02B6/2856 ,  C03B37/01446 ,  C03B37/028 ,  C03B2201/14 ,  C03B2203/22 ,  Y10S65/16

    Abstract: A B₂O₃-doped tubular porous silica preform is heated, and a fluorine-containing gas, such as SiF₄ or CF₄, is flowed into its aperture. The temperature is sufficiently high to cause the fluorine-containing gas to decompose and form fluorine which dopes the preform. Also flowed into the aperture is a sufficient amount of BF₃ to prevent fluorine from reacting with the B₂O₃ in the porous preform and thereby inhibit formation of a B₂O₃-depleted region near the aperture surface.
    The doped porous preform is then consolidated to fuse the particles and form a dense glass tube containing both boron and fluorine as dopants with substantially uniform radial composition profiles (see fig.5). Optical fibres can be placed in the dense glass tube which is then collapsed to form a fibre optic coupler.

    Abstract translation: 公开了一种形成掺杂有硼和氟的玻璃管的方法。 加热B2O3掺杂的管状多孔预制件，并且含氟气体流入其孔。 温度足够高，导致含氟气体分解并形成掺杂预成型体的氟。 也流入孔中的是足够量的BF 3，以防止氟与多孔预型体中的B 2 O 3反应并在孔表面附近形成B 2 O 3贫化区。 然后将颗粒熔合以形成含氟致密玻璃管。

    Reare earth doped optical fibre amplifiers
    85.
    发明公开
    Reare earth doped optical fibre amplifiers 失效
    Mit seltenen Erden dotierte faseroptischeVerstärker。

    公开(公告)号：EP0602467A1

    公开(公告)日：1994-06-22

    申请号：EP93119433.6

    申请日：1993-12-02

    Applicant: PIRELLI CAVI S.p.A.

    Inventor： Roba, Giacomo Stefano

    IPC: G02B6/22 ,  H01S3/06 ,  C03C13/04

    CPC classification number: G02B6/0365 ,  C03B37/01807 ,  C03B37/01838 ,  C03B2201/10 ,  C03B2201/12 ,  C03B2201/14 ,  C03B2201/28 ,  C03B2201/31 ,  C03B2201/34 ,  C03B2201/36 ,  C03B2203/22 ,  C03C13/046 ,  G02B6/03644 ,  H01S3/06708 ,  H01S3/06729 ,  H01S3/094011 ,  H01S3/1691

    Abstract: An optical amplifier for amplifying an optical signal having a signal wavelength λ s , comprises an optical fibre (20) having an erbium doped core (34) surrounded by cladding (42, 32, 30), a pump (22) for pumping the fibre with pump light at a pump wavelength λ p coupled to the fibre, said erbium doped optical fibre having a NA higher than 0.2, the difference in the coefficient of thermal expansion of the core adjacent the core/cladding interface and the coefficient of thermal expansion of the cladding at at least one radius less than 2µm from said interface being lower than a predetermined value, corresponding to a ratio of erbium loss to background loss, at said pump wavelength, greater than a minimum ratio calculated by a given increasing function of the ratio erbium loss/background loss versus erbium loss, in which said minimum ratio is about 20 when erbium loss is 0.15 dB/m and about 120 when erbium loss is 3.5 dB/m.

    Abstract translation: 一种用于放大具有信号波长λs的光信号的光放大器，包括光纤（20），其具有由包层（42,32,30）围绕的掺铒芯体（34），泵浦（22） 泵浦光以与泵浦波长λp耦合的光纤，所述铒掺杂光纤的NA高于0.2，核心/包层界面附近的芯体的热膨胀系数与热膨胀系数之差 所述界面处的至少一个小于2μm的半径的包层低于在所述泵浦波长处的铒损耗与背景损耗的比率的预定值，大于通过给定的增加函数计算的最小比率 铒损耗/背景损耗与铒损耗的比率，其中当铒损耗为0.15dB / m时，所述最小比为约20，当铒损耗为3.5dB / m时，所述最小比为约120。

    Image fiber, image fiber preform, and manufacturing processes thereof
    87.
    发明公开
    Image fiber, image fiber preform, and manufacturing processes thereof 失效
    Bildfaser，Bildfaservorform和Herstellungsverfahren。

    公开(公告)号：EP0391742A2

    公开(公告)日：1990-10-10

    申请号：EP90303742.2

    申请日：1990-04-06

    Applicant: FUJIKURA LTD.

    Inventor： Tsumanuma, Takashi ,  Tanaka, Toshiyuki ,  Shamoto, Naoki ,  Seto, Katsuyuki ,  Sanada, Kazuo ,  Tanaka, Kouji

    IPC: G02B6/06 ,  C03B37/012 ,  C03B37/028 ,  C03C13/04

    CPC classification number: C03B37/01214 ,  C03B37/028 ,  C03B2201/08 ,  C03B2201/14 ,  C03B2203/22 ,  C03C13/045 ,  G02B6/06

    Abstract: An image fiber preform for use in an image fiber according to the present invention includes a plurality of optical fiber strands, each optical fiber strand including a silica glass core which contains a dopant for increasing a refractive index of the core and a silica glass cladding surrounding the silica glass core, the silica glass cladding containing a fluorine dopant for decreasing a refractive index of the cladding, the cladding having an outer peripheral surface, and a quartz tube in which the optical fibers are closely arranged, wherein the cladding has a concentration of the fluorine dopant which decreases radially outward toward the outer peripheral surface of the cladding. In the present invention, an image fiber prepared from the image fiber preform and fabrication processes for the image fiber preform and the image fiber are provided.

    Abstract translation: 根据本发明的用于图像光纤的图像纤维预制件包括多条光纤线束，每条光纤线束包括含有用于增加芯的折射率的掺杂剂的石英玻璃芯和围绕 所述石英玻璃芯，所述石英玻璃包层含有用于降低所述包层的折射率的氟掺杂剂，所述包层具有外周面，以及石英管，其中所述光纤紧密配置，其中所述包层的浓度为 氟掺杂剂朝向包层的外周表面径向向外减小。 在本发明中，提供从图像纤维预制件制备的图像纤维和用于图像纤维预制件和图像纤维的制造工艺。

Patent Agency Ranking