Tunable attenuator based on polymer microstructured optical fibers

Based on polymer microstructured optical fibers (PMOF) and selective liquid crystal injection technology,a novel temperature control tunable attenuator is designed theoretically in this paper. In our experiments,PMMA microstructured optical fibers with high performance are drawn successfully and the selective injection of liquid crystal 5CB into microholes is realized. The tunable attenuator is fabricated with an extinction ratio of over 60 dB,which agrees well with the design.