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Studies on Characters and Applications of Tapered Optical Fibers

Author: ZuoXiaoMing
Tutor: HouJing；ChenZiLun
School: National University of Defense Science and Technology
Course: Optical Engineering
Keywords: Fused Ordinary optical fiber Photonic crystal fiber Supercontinuum Low-loss fusion
CLC: TN253
Type: Master's thesis
Year: 2010
Downloads: 218
Quote: 1
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Abstract


Fiber taper is an important fiber processing technology, by pulling the cone can change the shape of the optical properties of the fiber and the production of a variety of fiber optic devices, play an important role in expanding the application of optical fiber. Photonic crystal fiber is a new kind of optical fiber, structural design flexibility so that it can not match the excellent characteristics have many ordinary fiber. The fiber taper technology used in photonic crystal fiber, not only provides a broader platform for the application of photonic crystal fiber, but also enriched the theory and content of fiber tapering. From both theoretical and experimental aspects of ordinary optical fiber and photonic crystal fiber tapering and air hole collapse technology research, to explore the tapered fiber generated supercontinuum and low loss splice application. A theoretical analysis of the process and structural characteristics of the ordinary optical fiber cone, numerical simulation of the process of tapering fiber mode field and dispersion curve changes. From the perspective of tapering environment parameter control and tapering fiber shape the conditions of low-loss tapered, provides a theoretical basis for low-loss optical fiber tapering. Experimental Fused machine different diameter low-loss tapered optical fiber. Diameter is only slightly nanoscale fiber satisfied the simulation and analysis. 2 theoretically and experimentally explore the ordinary tapering fiber to generate supercontinuum application, by changing the femtosecond pump laser wavelength and tapering outer diameter of the fiber, the pump wavelength and fiber diameter and generate supercontinuum the relationship of the spectrum. 3 Theoretical Analysis of the technology of photonic crystal fiber pull cone and the air hole collapse. Experiment, Fused photonic crystal fiber heating tapering, keep the air-filled than the same case, the use of \the case of the use of the \4 use pull-cone technology in tapered photonic crystal fiber supercontinuum. Photonic crystal fiber dispersion curves by tapering control, four-wave mixing dual-wavelength laser to pump in the anomalous dispersion region tapered photonic crystal fiber, improve the efficiency of the pump, and the total length of 1m photonic crystal fiber to generate supercontinuum output greater than 600 to 1700nm spectral range. The use of air the hole collapse technologies increase the photonic crystal fiber mode field diameter, eliminating the mode field mismatch, to achieve a low-loss small core photonic crystal fiber welding. Repeated discharge welding machine and pull cone machine heating collapse two methods respectively, to achieve the mode field mismatch small and low-loss splice mode field mismatch between the larger photonic crystal fiber with fiber, photonic crystal fiber better compatible with existing fiber-optic system, laying the groundwork for the application of photonic crystal fiber and systematic.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Photonics technology,laser technology > Optical waveguide and integrated optics > Fiber optic components
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