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- 根据光纤光栅周期的长短不同,可将周期性的光纤光栅分为短周期(Λ<1μm)和长周期(Λ>1μm)两类。- According to the optical fiber grating period length is different, the fiber Bragg grating period is divided into short period (<1 μ m) and long period (>1 μ m) tw