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    • 1. 发明授权
    • Fiber bragg grating fabrication method
    • 光纤布拉格光栅制作方法
    • US06832025B2
    • 2004-12-14
    • US10183681
    • 2002-06-28
    • Norman FisherJulian Jones
    • Norman FisherJulian Jones
    • G02B6124
    • G02B6/02066G02B6/02095G02B6/0218G02B6/02185G02B6/02209
    • In an optical waveguide fabricated to provide spectral filtering by a periodic mode coupling between the core and cladding the spectral profile may be shifted in wavelength if the core or cladding is photosensitive. This is especially useful in the case of long period gratings used as gain flattening filters, as a relatively low dose of radiation, compared with that typically required to fabricate a Reflection Bragg Grating in the same fiber, provides a sufficient shift for filter tuning purposes. Subsequent thermal exposure can stabilize the filter performance over the expected temperature range, while exposure to higher temperature reverses the radiation induced shift.
    • 在制造为通过芯和包层之间的周期性模式耦合提供频谱滤波的光波导中,如果芯或包层是光敏的,则光谱轮廓可以在波长上移位。 与在相同光纤中制造反射布拉格光栅通常需要的相比,作为相对低的辐射剂量的长周期光栅用作增益平坦化滤光器的情况尤其有用,为滤光器调谐目的提供了足够的偏移。 随后的热暴露可以将过滤器性能稳定在预期的温度范围内,而暴露于较高温度则会反转辐射诱发的位移。