W pracy przedstawiono metodę kontroli procesów dyfuzyjnego domieszkowania szkieł realizowaną w rzeczywistym czasie trwania procesu. Bazuje ona na rozwiązywaniu równania dyfuzji w kolejnych krokach czasowych z uwzględnianiem rzeczywistej temperatury procesu. Aktualna wartość temperatury pozwala na podstawie charakterystyk temperaturowych współczynników dyfuzji wyznaczać ich chwilowe wartości. Metoda ta znajduje zastosowania w procesach wytwarzania gradientowych światłowodów planarnych techniką wymiany jonów.
EN
The paper presents a method of controlling diffusion glass doping processes realized in the real time of the process. This method is based on solving of the diffusion equation in subsequent time steps, taking into account of the current process temperature. On the basis of the temperature characteristics of the diffusion coefficients, their instantaneous values can be determined. This method is used in the production of the gradient planar optical waveguides using the ion exchange technique.
This paper presents the technological aspect of application of the ion exchange method in producing gradient refractive index in glass. The possibility of predictable and repeatable producing of the changes in glass refraction with the use of this method has been presented, as well as the method of in situ control of the process of diffusion doping of glass based on the measurement of the temperature. This method is based on simultaneous (to the carried process) solving the nonlinear diffusion equation modeling the spatio-temporal changes in normalized concentration of the admixture ions in glass. For this purpose the knowledge of temperature characteristics of diffusion coefficients of exchanged ions is used. The result of such control of diffusion processes is information on the current (temporary) refractive index profile of the resulting waveguide. The presented method of control has been confirmed by experimental results, which concern modeling and measurements of planar waveguide structures of slab type. The proposed methodology can also be used to control the diffusion processes of producing another type of two- and three-dimensional gradient structures. According to the author’s knowledge the method mentioned above has not been described in literature before.
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This paper presents recent developments in investigations of glass intregrated optical circuit. Components are realised by the waveguide technologies: single ion exchange, creating of buried strip waveguides, double ion exchange, and doped glass strip waveguides. Moreover, double refraction of glass planar waveguides, equipment and elements on glass planar waveguides and multimode interference structures in the technology of elements of integrated optics and plasmon interaction are illustrated.
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