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    • 7. 发明授权
    • Long-period optical fiber grating filter device
    • 长周期光纤光栅滤波器
    • US06314222B1
    • 2001-11-06
    • US09467688
    • 1999-12-21
    • Joo-Nyung JangSun-Wook KimSe-Yoon KimMin-Sung Kim
    • Joo-Nyung JangSun-Wook KimSe-Yoon KimMin-Sung Kim
    • G02B634
    • G02B6/02095G02B6/0219H01S3/0675H01S3/1055
    • A long-period fiber grating filter device which includes a core having refractive index modulations formed therein at every predetermined distance, a cladding surrounding the core, a coating covering the cladding portion not adjacent to the long-period fiber gratings, a recoating covering the cladding portion adjacent to the long-period fiber gratings, a long-period fiber grating where a coupling wavelength exhibits a negative wavelength shift with respect to temperature change according to the amount of a dopant added to the core, and a recoating material where the refractive index decreases with temperature increase and the coupling wavelength exhibits a positive wavelength shift by the effect of the recoating material, wherein the negative wavelength shift in long-period fiber grating itself and the positive wavelength shift by the effect of the recoating material balance each other to eliminate temperature control in the long-period grating filter device.
    • 一种长周期光纤光栅滤光器装置,其包括在每个预定距离处形成有折射率调制的芯,围绕芯的包层,覆盖不与长周期光纤光栅相邻的包层部分的涂层,覆盖覆层的覆盖层 与长周期光纤光栅相邻的部分,长周期光纤光栅,其中耦合波长相对于根据添加到芯的掺杂剂的量的温度变化而呈现负波长位移;以及重折射材料,其中折射率 随着温度的升高而降低,耦合波长通过重涂材料的作用呈现出正的波长偏移,其中长周期光纤光栅本身的负波长偏移和由重涂材料的作用产生的正波长偏移相互平衡以消除 长周期光栅滤波器中的温度控制。
    • 10. 发明授权
    • Apparatus for fabricating apodized fiber grating
    • 用于制造变迹光纤光栅的装置
    • US06707956B1
    • 2004-03-16
    • US09608134
    • 2000-06-30
    • Se-Yoon KimSang-Gil ShinMin-Sung Kim
    • Se-Yoon KimSang-Gil ShinMin-Sung Kim
    • G02F1295
    • G02B6/02138G02B6/02085
    • There is provided an apparatus for fabricating an apodized fiber grating. In the apodized fiber grating fabricating apparatus, a UV (Ultraviolet) laser emits a UV laser beam, a beam splitter splits the UV laser beam emitted from the UV laser into two beams, a plurality of mirrors form light paths to concurrently project the split beams onto an optical fiber from two directions by reflecting the split beams, a phase mask passes the reflected beams therethrough in such a way to form gratings in the optical fiber in a predetermined period, a first blocking device is disposed between the phase mask and one of the mirrors, progressively blocks one of the two beams from being projected toward the optical fiber from one direction, and provides apodization to the formed gratings, and a second blocking device, which is mobile and opposite to the first blocking device with respect to the optical fiber, progressively blocks the other beam from being projected toward the optical fiber from another direction and provides apodization to the formed gratings, so that an average refractive index variation is constant across the whole gratings.
    • 提供了一种用于制造变迹光纤光栅的装置。 在变迹光纤光栅制造装置中,UV(紫外线)激光器发射UV激光束,分束器将从UV激光器发射的UV激光束分成两束,多个反射镜形成光路,以同时投影分束 通过反射分束,从两个方向到达光纤,相位掩模以预定的时间间隔使得反射光束通过其中以形成光纤中的光栅,第一阻挡装置设置在相位掩模之间 反射镜逐渐地阻止两个光束中的一个从一个方向向光纤投影,并且向形成的光栅提供变迹,以及第二阻挡装置,其相对于光学器件移动并与第一阻挡装置相对 纤维逐渐阻止另一束从另一方向向光纤投影,并向形成的光栅提供变迹,使得ave 整个光栅的辐射折射率变化是恒定的。