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    • 4. 发明申请
    • AN OPTICAL BODY HAVING MODIFIABLE LIGHT GUIDING PROPERTIES
    • 具有可修改的光指导属性的光学体
    • WO9950696A3
    • 1999-11-25
    • PCT/SE9900550
    • 1999-04-01
    • IOF INST FOER OPTISK FORSKNINGFOKINE MICHAEL
    • FOKINE MICHAEL
    • G02B6/02C03C25/00G02B6/036G02B6/28G02B6/16
    • G02B6/03694C03C25/002G02B6/02042G02B6/02052G02B6/03644G02B6/2835G02B2006/2839
    • In an optical fiber or other light guiding body is utilized that the diffusion properties of fluorine, which reduces the refractive index, are strongly changed, if also a doping with phosphorous is made, to change the refractive index and thereby the light guiding properties. In for example a single mode fiber (1) thus locally an additional waveguide core (9) can be created parallel to the already existing waveguide core (3), by providing in parallel to the ordinary core (3) an activatable region (5) having substantially the same dimensions as the existing core and having suitable dopings of fluorine and phosphorous. This can be utilized to produce an optical filter element. If the optical fiber is D-fiber, a sensor element can be produced. Furthermore, for suitable concentrations of these dopants and of germanium an existing waveguide core can be erased by a heating operation.
    • 在使用光纤或其他导光体中,如果还进行磷掺杂,则改变降低折射率的氟的扩散性能,以改变折射率,从而改变导光性。 在例如单模光纤(1)中,通过与普通芯(3)平行地提供可激活区域(5),可以平行于已经存在的波导芯(3)而产生附加的波导芯(9) 具有与现有芯基本相同的尺寸并具有合适的氟和磷掺杂。 这可以用于制造光学滤光元件。 如果光纤是D纤维,则可以制造传感器元件。 此外,对于这些掺杂剂和锗的合适浓度,可以通过加热操作来擦除现有的波导芯。