The Novel Fiber-based Devices Investigation Based On Super Mode And Quasi-quantum Optics Theory

On the basis of the supermode theory and quasi-quantum optics theory,we proposed several fiber based device and their polarization characteristics were studied in detail.The devices proposed in this paper include single-mode fiber-optic double-polarization interferometer,metal-plasmon polarized interferometer,and polarization rotator.In this dissertation,a brief introduction and comments about the development of photonic crystal fiber and optical fiber sensing were given.After that,I made a brief introduction about modal theory,such as quantum-like optical theory and topology Zeeman effect,and surface plasmon theory.The rest of the main research works and achievements are as follows: In Chapter 3,a single-mode fiber-optic ring device was proposed.On the basis of the theory in Chapter 2,the device’s polarization characteristics were analyzed.Its interference spectra characteristics are highly dependent on the polarization of the pump light.After that,we developed a manipulation technique for editing the output spectrum.Then,the response of the device is experimentally verified with a series of polarization states of the pump.(1)By using the full vector finite element method,the birefringent interference model was theoretically established and verified experimentally;(2)The results show that the cladding/air waveguide is coupled with the core/cladding waveguide,and the parity-modes are generated in the orthogonal polarization directions and verified by the refractive index experiments;(3)When the polarization state of the incident light is parallel to the optical axis,the response to the ambient refractive index is differential;(4)When the polarization state of the incident light is parallel to the optical axis,the response is more sensitive to the light polarization along fast axis.The experimental data show that the maximum average refractive index response of the fiber loop is ~657.895 nm/RIU.In chapter four,the polarization characteristics of the single polarized micro-fiber interferometer formed by the metal plasmon were analyzed.The main contents are as follows:(1)In theory,a single-polarization interferometer model with air plasmon and mixed plasmon is established and verified in experiments;(2)It was found that the SPPs were coupled with the mixed SPPs by doping the absorber / scatterer,such as the silanols in the experiment in Chapter 4,i.e.,the dopant makes the projections of the two modes no longer orthogonal;(3)The transmission spectrum of the device is very sensitive to the polarization angle of the input linearly polarized pump,which can be used for torsional measurement and vice versa;(4)Different types of absorbers/scatters can be used to improve the TM polarization characteristics of other bands.In chapter five,two kinds of fiber polarization rotating devices are designed and analyzed in detail,which are based on(1)the topological Zeeman effect and(2)the quantum-like optical principle.The aim of the first design is proposed a regular arrangement air hole background photonics crystal fiber design for overcoming the traditional irregular core section design.In the second design,the optical fiber polarization rotator has the ability for compatible with the single-mode optical fiber.