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Tunable Chirped Fiber Bragg Grating Filter Based on Special Strain Function Modulation and Its Application in Fiber Sensor

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7 Author(s)
Bo Dong ; Inst. of Modern Opt., Nankai Univ., Tianjin ; Qida Zhao ; Lihui Liu ; Guiling Huang
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A novel technique for chirp control of a uniform fiber Bragg grating (FBG) based on the special strain function modulation is presented. A cylinder taper cantilever beam (CTCB) is specially designed and capable of providing special position-dependent strain function gradients along an originally uniform FBG, which allows tunable quasi-triangular and quasi-Gauss-gradient FBG filter. Furthermore, the feasibility of the tunable chirped FBG based on the strain function modulation as sensor is validated. This state-of-art technique is expected to be applied in fiber filter, FBG sensor and multiwavelength fiber laser.

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Lightwave Technology, Journal of  (Volume:26 ,  Issue: 14 )