Polarization maintaining photonic crystal fiber based inter-modal interferometer and its applications (Invited paper)

We report our recent research on the polarization maintaining photonic crystal fiber (PMPCF) based inter-modal interferometer and its applications. The interferometer is constructed by a single mode fiber (SMF)-PMPCF-SMF structure, with a slight core-offset at one splice joint. The fabrication process only involves splicing and cleaving. It has the advantages of compact structure, low cost, easy fabrication, and temperature insensitiveness. It can be used as all fiber filters and sensors.