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Er-Yb co-doped phosphate glass fiber characterization analysis and design

Author: XueHui
Tutor: YangYaPei
School: University of Electronic Science and Technology
Course: Optical Engineering
Keywords: Erbium ytterbium Phosphate glass Optical fiber
CLC: TN25
Type: Master's thesis
Year: 2005
Downloads: 142
Quote: 0
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Abstract


This article describes the erbium-doped fiber amplifier (EDFA) is characterized by its small gain per unit length , the output power is small shortcomings. This leads to the Er-Yb co-doped phosphate glass fiber , double-clad structure to solve these two problems . Thesis Er-Yb co-doped phosphate glass fiber and double-clad theories were studied. This part of the work includes three aspects: firstly introduces the energy levels of erbium ions doped phosphate glass structures and spectral properties . Then by solving the equation of propagation rate equations and erbium ytterbium co-doped phosphate glass fiber gain characteristics , and a detailed analysis of the erbium ion doping concentration , pump power , signal wavelength , fiber length on erbium ytterbium co -doped phosphate glass fiber gain influence . Finally studied the double-clad structure, pump light absorption efficiency. Introduced the double-clad structure 's basic assumptions. Analysis of two circular double-clad structure, namely concentric and eccentric double-clad structure derived from the structure of the double cladding pump light absorption efficiency relationship with structural dimensions . Square with a circular cladding structure compared with the structure has a higher light absorption efficiency of the pump . Based on reasonable assumptions , well-designed model, we studied in detail the structure rectangular double-clad fiber pump light absorption efficiency theory, the pump light absorption efficiency with double-clad structures. Based on the theoretical analysis, this paper Er-Yb co-doped phosphate glass fiber design . In order to obtain higher gain and greater output power , the paper matrix material , phosphate glass material composition , manufacturing process, Er-Yb co-doped erbium ytterbium ion concentration in the system , the proportion of the design . In this paper, based on a rectangular double-clad structure analysis and design of rectangular double-clad optical fiber . Final study of phosphate glass cladding optical fibers and method of making the production process of the problems that may arise . The samples produced by the 209 project is completed. So far the production of complete optical fiber preform .

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