Home › Forums › GRATING › FBG parameter › Reply To: FBG parameter
May 23, 2014 at 3:47 am
#11773
Hi, Lizzie Li,
Thanks for your response.
I want to ask about the effective index.
The well-known FBG equation, => Lambda = 2 * pitch * Neff.
The Neff is the effective mode of the fiber or the effective index of the grating region?
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