Sychova O. Automation of photonic crystal fibers connection processes

The dissertation work is dedicated to the decision of an important and actual scientific and applied task of methods and means development of technological, informational and mathematical maintenance which guarantee the set parameters of photonic crystal fibers connection processes and accordingly low optical losses in their connections. Theoretical substantiation of construction of automated control systems of photonic crystal fibers positioning processes at their connection is executed in the work. The result was the further development and improvement of mathematical software complex through the development of methods for automated positioning of photonic crystal fibers in their axes and mode field distribution. The first method is based on autoconvolution method sequentially determined of the optical field distribution center coordinates, which is measured in the rear planes of photonic crystal fibers perpendicularly illuminated and represented by a linear regression model. This has improved the quality of the connection and reduced the loss of signals optical power in the connection. The second method allows to coordinate the distribution of mode fields at the ends of longitudinally excited photonic crystal fibers by determining and returning the angle of mutual rotation of the fibers around their longitudinal axis. This made it possible to take into account the structure of the mode field of the fiber during the connection process and to reduce the optical losses. Modeling and physical experimental researches which have proved achievement of the necessary indicators of photonic crystal fibers positioning accuracy and, as a result, improvement of their connections quality characteristics are carried out. Keywords: photonic crystal fiber, positioning, signal loss, control, automated control system, connection process.