supported by the National Natural Science Foundation of China (Grant Nos. 11274181,10974100,and 10674075);the Tianjin Key Program of Application Foundations and Future Technology Research Project,China (Grant No. 10JCZDJC24300);the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20120031110033)
A novel tunable comb filter composed of a single-mode/multimode/polarization-maintaining-fiber-based Sagnac fiber loop is proposed and experimentally demonstrated. The filter tunability is achieved by rotating the pol...