介紹了具有壓電聚合物護套的光纖電場傳感器的有限元分析, 這種光纖電場傳感器能響應100Hz至50MHz 的頻率。采用有限元分析可以預知低頻段(軸向非約束) 0. 019rad?(V ·m ) 的相位偏移和在高頻段(軸向約束) 8. 2×10- 4 rad?(V ·m ) 的相位偏移。當頻率高于7MHz 時, 光學響應主要是光纖和聚合物護套組合材料的徑向諧振。模擬預測的諧振尖峰和合成理論推算出的諧振尖峰具有很好的一致性。
[關鍵詞]　有限元分析; 光纖電場傳感器; 壓電聚合物護套
Abstract: A novel FEA app roach fo r analyzing a fiber op t ic elect ric field senso r w h ich has a t ransversely po lar2 ized p iezoelect ric po ly (vinylidene fluo ride) po lymer coat ing is p resented. The response of the fiber op t ic elect ric field senso r is ranged from 100Hz to 50MHz. The modeling p redicts a phase sh ift of 0. 019rad?(V ·m ) in the low fre2 quency (axially unconst rained) region and 8. 2×10- 4 rad?(V ·m ) in the h igh frequency (axially const rained) re2 gion. A t frequencies h igher than 7MHz the op t ical response is dom inated by radial resonance of the fiber2jacket compo site. Good agreement exists betw een the resonance peak s p redicted by the simulat ion and tho se theo ret ically calculated using compo site theo ry.
Key words: finite element analysis (FEA ) ; fiber op t ic elect ric field senso r; p iezoelect ric po lymer coat ing