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Research on Theory and Correlation Technique of Side-Polished Fiber Microbeam Resonator Excited Optically

Author: LiuLeTao
Tutor: LiuYueMing
School: Xi'an University of Technology
Course: Precision instruments and machinery
Keywords: All-optical micro - beam resonator Grinding optical fiber Quality factor Support damping ANSYS software
CLC: TH744
Type: Master's thesis
Year: 2008
Downloads: 53
Quote: 0
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Abstract


In recent years , the micro- resonator optical excitation has been widespread concern , the the resonator excitation light detection of light transmitted through the optical fiber suitable for electromagnetic interference , flammable and explosive occasions . Conventional optical excitation micro-resonators require additional excitation light source and detecting light source , the optical system is more complicated , more difficult to achieve . In this paper a new all-optical micro - beam resonator structure , the structure will be grinding of the processed portion of the optical fiber as the sensitive element of the resonator . Under such conditions , the excitation optical fiber , the detection optical fiber and the sensitive element is coupled as a whole , thus overcoming the conventional structure of the optical system is too complex shortcomings . In this paper, the optical fiber micro - beam resonator structure theory and relevant technical research : First, for the grinding optical fiber micro- beam quality factor analysis and detailed analysis of the structure of the support damping . First theoretical modeling using Euler beam theory and two-dimensional elastic wave theory of the structure , and then apply the Fourier transform and its inverse transform of the damping of the structure supporting MATLAB simulation software , free mode , the Q value of the structure simulation , high Q value , the results prove the feasibility of this new type of micro - resonant structures , laid a theoretical foundation for future work . Secondly, the processing means and the advantages and disadvantages of the process design of the optical micro - beam resonator devices and micro- resonators , and a theoretical study of multilayer grinding fiber structure of optical transmission loss , the results show that : the grinding fiber transmission the loss and the grinding surface of the fiber distance related to the distance between the core and the refractive index of the polymer and its thickness . Finally , the numerical calculation of of abrasive fiber structure exists in a variety of damping in the form of fiber micro - beam structure quality factor . Simulation analysis, various factors affect the structural damping structure : polishing the optical fiber with the quality factor of the grinding thickness decreases with increasing the grinding length , and increases and decreases as the ambient temperature increases , with the ambient pressure decreases . Finally , the natural frequency of the grinding fiber optic beam mechanical finite element simulation analysis ANSYS software .

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CLC: > Industrial Technology > Machinery and Instrument Industry > Instruments, meters > Optical instruments > Physical optical instruments
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