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    • 7. 发明申请
    • TEMPERATURE COMPENSATED LONG PERIOD OPTICAL FIBER GRATING FILTER
    • 温度补偿长周期光纤光栅滤光片
    • WO00055658A1
    • 2000-09-21
    • PCT/KR2000/000200
    • 2000-03-13
    • G02B5/18G02B6/00G02B6/02G02B6/14G02B6/34
    • G02B6/0219G02B6/02095
    • Disclosed is a temperature compensated long period optical fiber grating filter. The long period optical fiber grating filter includes a core formed with a long period grating, a cladding surrounding the core, a coating coated over a portion of the cladding not surrounding the long period grating, and a re-coating coated over a portion of the cladding surrounding the long period and made of a material exhibiting an increase in refractive index in accordance with an increase in temperature, the recoating serving to allow a coupling wavelength shift caused by the increase in refractive index to be carried out in a direction opposite to that of a coupling wavelength shift caused by a refractive index difference between the core and the cladding. In accordance with this long period optical fiber grating filter, a temperature compensation can be more easily achieved without any inconvenience caused by an adjustment of refractive index in the filter or an addition of a material for avoiding a variation in refractive index depending on temperature.
    • 公开了一种温度补偿长周期光纤光栅滤波器。 长周期光纤光栅滤波器包括形成有长周期光栅的芯,围绕芯的包层,涂覆在不围绕长周期光栅的包层的一部分上的涂层,以及涂覆在部分 围绕长周期的包层,由根据温度升高显示出折射率增加的材料制成,重复使用以使折射率增加引起的耦合波长偏移在相反方向上进行。 由芯和包层之间的折射率差引起的耦合波长偏移。 根据该长周期光纤光栅滤光器,可以更容易地实现温度补偿,而不会由于过滤器中的折射率的调整而导致的任何不便,或者添加用于避免根据温度的折射率变化的材料。
    • 8. 发明申请
    • OPTICAL WAVEGUIDE GRATING AND METHOD OF MANUFACTURING THE SAME
    • 光波导光刻及其制造方法
    • WO99036815A1
    • 1999-07-22
    • PCT/JP1999/000040
    • 1999-01-08
    • G02B5/18G02B6/12G02B6/34G02B6/16
    • G02B6/0219G02B6/02095G02B6/02142G02B6/02147
    • In an optical fiber (l0), which has a clad region (l2) around a core region (11), of an optical waveguide grating, periodic refractive index variation occurs in a predetermined range (l3) extending in a direction of the optical axis of the core region (ll), the core region (ll) having composition of, for example, GeO2-P2O5-SiO2, the clad region (l2) comprising SiO2, a co-addition ratio in the core region (ll) being regulated, whereby the temperature dependency of the property thereof is reduced, an amount of addition of P2O5 in the core region (ll) being preferably not less than l/l5 times and not more than l times that of GeO2, and more preferably 0.6-l times that thereof.
    • 在光波导光栅围绕芯区域(11)具有包层区域(12)的光纤(10)中,在沿光轴方向延伸的预定范围(13)中发生周期性折射率变化, (II)的核心区域(11),具有例如GeO 2 -P 2 O 5 -SiO 2的组成的核心区域(11),包含SiO 2的包层区域(12),芯区域(11)中的共添加比率被调节 由此,其特性的温度依赖性降低,核心区域(II)中的P 2 O 5的添加量优选为GeO 2的1/15以上1倍以下,更优选为0.6l 次数。