Micro-structure Of Polymer Pmf Study

Compared to the conventional polarization-maintaining (PM) fiber and the silicon-based micro-structured optical fiber (MOF), the polarization-maintaining micro-structured polymer fiber (PM-MPOF) not only has the advantages of polymer optical fiber (POF), but also has the strongpoint of MOF. PM-MPOF has become a topic of interest due to its significant applications in high-speed optical communication system and optical sensors. In this dissertation, with the combination of the POF and MOF, we concentrate on establishing the theoretical model to analyze the optical properties of the polymethyl methacrylate (PMMA) -based high-birefringent micro-structured PM fiber and the PMMA-based single-polarization single-mode (SPSM) MOF. Moreover, we also carry out some initial attempt about the fabrication technique of MPOF. The main achievements are listed below:1. A full vector plane wave expansion method is adopted to theoretically simulate the properties of the high birefringence PM-MPOF and to optimize the fiber's micro-structured parameters. We investigate the relationship between the micro-structured parameters and the PM-MPOF's properties including the birefringence, mode characteristic, dispersion and polarization mode dispersion features, etc. The numerical calculations show that special PM-MPOF can be designed by adjusting the micro-structured parameters. This result will supply an effective way of fabricating MPOFand promote the practical development of MPOF.2. An SPSM-MPOF was proposed based on PMMA. A full vector plane wave expansion method is adopted to theoretically analyze the optical properties of the fiber. The numerical results indicate that only one polarization state of the fundamental mode can be transmitted within the visible light region from 570 nm to 710 nm according to the different cutoff wavelength for two orthogonal polarization modes. Simultaneously, the confinement loss of the guiding mode less than 0.16dB/m is obtained at the wavelength of 650 nm. This low loss MPOF with the maximum SPSM bandwidth of 140 nm is designed.