Er-yb Co-doped Phosphate Glass Waveguide Lasers And Waveguide Produced

The general development, characteristic and applications of Er3+:Yb3+ co-doped phosphate glass waveguide laser were summarized at first. The characteristic of Er3+:Yb3+ co-doped phosphate glass and main fractured methods of optical waveguide were also introduced. Then three aspects of our work were discussed in detail. Based on numerical modeling, theoretical analysis and examinational investigating, some useful conclusions were proposed. Mode distributions and relevant propagation constant of every mode of rectangular dielectric optical waveguide were obtained by two-dimensional linear finite element method. The dispersion curve of rectangular dielectric waveguides that have different ratio of length to width was drawn. Normalized pump and signal intensities in rectangular dielectric optical waveguide were calculated too. The theory of Er3+:Yb3+ co-doped phosphate glass waveguide laser was introduced and analyzed. Ignoring the amplified spontaneous emission (ASE), rate equations and propagations equations for continuous wave Er3+:Yb3+ co-doped phosphate glass waveguide laser with pumped of 980nm wavelength were analyzed by means of Runge-Kutta algorithm, propagation characteristic of signal and pump light in waveguide were analyzed too. Effect of different ratio of Yb3+ to Er3+ concentration are studied, the calculated result indicated that the output power and slope efficiency of wavguide laser were higher when the ratio of Yb3+ to Er3+ concentration ranged from 8.5 to 25. The waveguide length and the reflectivity of output mirror were optimized too. Using ion-exchanged technique, the planar and channel waveguides were fabricated. Two new methods for cleaning glass were proposed, and the cleaning result proved better. The mode refractive index at 632.8nm of planar waveguide was calculated with parameters that measured by m line technology. The near field figure of channel waveguide at 632.8nm wavelength was obtained. The curve of index profile of planar waveguide was drawn with inverse WKB method.