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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。