Study On Electro-Optic Deflectors Based On Inverting Feroelectric Domains With Different Surface And Their Applications

Beam steering technologies are capable of steering precisely laser beam widely used for applications in optical communications, such as optical data storage, optical switches, aerospace, laser navigation, laser radar, and display technologies. The electro-optic deflectors based on inverting ferroelectric domains have several advantages over mechanical and other systems including high-speed, good-controlled, small-size, light-weight, high-sensation and absence of moving parts, and their intrinsic response speeds (up to1011Hz) are of great interest in high-speed optical application system. Therefore, there are valuable significances and important applications in studies to excellent electro-optic deflectors. Basing on the principle of beam steering, three types of nonrectangular scanner of parabola, hyperbola and exponential shaped geometry are studied, the project of rectangular, trapezoid and parabola shaped are designed and tested. Finally, an electro-optic laser scanner for arbitrary scanning in8rows and planar4×4electro-optic switches based on ferroelectric inverted domains are designed. The main performances are as follows:1. The research and development in beam steering technologies and electric-optic deflectors of domestic and overseas are reviewed. Electro-optic deflectors based on inverting ferroelectric domains of domestic and overseas are mainly introduced. The operating principle of electro-optic deflectors based on inverting ferroelectric domains is also summarized.2. Basing on the operating principle of electro-optic deflectors, the influence of the numbers of triangular domains and cascaded modes in rectangular deflectors are researched. The deflecting characters of three types of nonrectangular scanner of parabola, hyperbola and exponential shaped geometry are analyzed numerically. And the deflection properties of rectangular, trapezoid and parabola shaped geometry are compared. The properties of the four deflectors are simulated using the beam propagation method (BPM). The theory analysis and simulation results are in good conformity.3. Using the spatially selective electric field, an experiment system of real-time to monitor domain reversal is assembled. Rectangular, trapezoid and parabola shaped geometry are manufactured and tested. The experimental results and the theoretical results are comparatively analyzed.4. Combining with birefringent and electric-optic effect of crystal, a scanner for arbitrary scanning in8rows is designed. It consists mainly of three orders electro-optic deflectors and trapezoid shaped geometry domain reversal electro-optic deflector groups. It can scan arbitrarily in8rows through using in high speed of light scanning operation.5. To optimize the design of the parabola and half-parabola shaped deflectors, a monolithic integrated and two pieces of integrated4×4planar electro-optic switches are designed based on the electro-optic effect in ferroelectric inverted domains. Their properties of switch and exchange are analyzed using the beam propagation method (BPM), simulation results and the theoretical analysis are basically the same.