光纤角度旋转传感器

Wedemonstratethefabricationofthehelicallong-periodgrating(HLPG)inatwo-modefiber(TMF)withCO2laser.Thetorsioncharacteristicsofthehelicalgratingsareexperimentallyinvestigated.ItwasfoundthattheresonancewavelengthoftheTMF-HLPGlinearlyshiftswithatwistsensitivityof0.47nm/(rad/m),whichisanor