Home Forums GRATING Ind.mod (index modulation)

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    • #68048
      Mohammed .A. Yaseen

      hi all
      can any one help me how i calculate the value of index modulation in FBG and what index modulation mean.

      thank you

    • #68062
      Amin Khorshidahmad

      Hi Yaseen,

      Please refer to page 22 of the manual for more details. In brief, Ind. Mod. (or delta_n) is the index modulation amplitude or the strength of the grating, e.g. peak refractive index change of the sinusoidal grating. Along with the length, It affects the bandwidth and reflectivity of the grating.

      Kid regards,

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