Doped Doped Phosphate Waveguide Lasers And Optical Waveguide Calculations And Production

With the continuous development of optical fiber communication and opticalrange finder, the better laser is needed. The more suitable light source, most times, thebetter performance the system will show us. In this paper, we have analyzed thephosphate glass waveguide laser, which has aboard applications in these two fields.Considering the amplified spontaneous emission, rate equations andtransmission equations were used to make the model of rare-earth-doped waveguidelaser. The rate equations for integrated Erbium-doped waveguide lasers in phosphatepumped at 980 nm were analyzed using overlapping methods in this paper. The modelis based on time-independent laser rate equations. The formulation results in a largeand stiff set of coupled differential equations. The output power and the populationsof ion energy levels were numerical calculated. The three parameters: the pump power,the doping concentration and waveguide length were discussed in this paper, they allcan effect the output power.In this paper, Marcatili's method and finite-element method were used tocalculate the electromagnetic field in rectangular dielectric optical waveguide.Bisection routine is used in calculating the transcendental equations, and the modedistributions were obtained. The Dirichlet condition was applied, thus we get theeigenvalue matrix equation, and more than one mode distributions were obtained. Thefinite-element method has two merits, the accuracy and wide applicability. So wehave used this method to analyze the ridge waveguide and strip waveguide.Using ion-exchanged technique, the planar waveguides were fabricated. Themode refractive index at 632.8nm of planar waveguide was calculated withparameters that measured by m line technology. The curve of index profile of planarwaveguide was drawn with inverse WKB method. Finally, the curve of the predictedwaveguide thickness as the function of exchanged-time was obtained. The curve ofthe predicted waveguide thickness as the function of silver ion concentration wasobtained. The curve of the predicted waveguide thickness as the function ofexchanged-temperature was obtained.