Transmission spectra of coated phase shifted long-period fiber gratings-中国期刊网

摘要 Thetransmissionspectrumofthecoatedphase-shiftedlong-periodfibergratings(LPFGs)withsingleandmultiplephaseshiftsisanalyzedbythecoupled-modetheoryandthetransfermatrixmethod,andtheinfluencesofthefilmparametersonthespectralcharacteristicsarealsostudied.ItisshownthattheseparameterswillaffecttheLPFGfilteringcharacteristics.Thelosspeakoftransmissionspectrumdecreaseswiththeincreaseoffilmthickness,andthepeakpositionshiftswiththefilmrefractiveindex.Comparedwiththenon-coatedphase-shiftedLPFG,thecoatedonehasthesimilardesirablefilteringcharacteristics,andithasaflexibleabilitytoadjustthetransmissionproperties.

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Transmission spectra of coated phase shifted long-period fiber gratings

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Transmission spectra of coated phase shifted long-period fiber gratings

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