The development of miniaturized and ruggedized optical circuits, containing a number of optical and perhaps also electronic components integrated on the same substrate, and performing useful optical functions - this is the goal of the key technologies for future systems of communication, of instrumenta tion, and of general signal processing; it is expected to combine and to complement the established technologies of microelectronics, optoelectronics, and fiber-optics. Today, after more than fifteen years of research on integrated optics, this goal appears to be almost within reach. The theoretical problems of 1ight propagation and of numerous forms of coupling and interactions in integrated-optical structures are generally well understood. A great variety of single components for integrated optics has been demonstrated experimen tally, and more recently also the successful integration of several compo nents on a common substrate. Laboratory operation of such integrated-optical 'chips' has been reported, e.g., for RF spectrum analysis, for high-speed analog/digital conversion, for a fiber-optic gyro, and for various high-per formance semiconductor laser sources. Before commercial fabrication and technical application of such devices can take place, however, their performance has to be further improved. Se rious technological and material problems are still to be overcome which are related to the small transverse dimensions and high optical power densities typical for integrated-optical waveguides. Progress can be expected here by further improvements and diversifications of micro-fabrication technologies and (perhaps more efficiently) by learning how to better adapt the optical structures to the existing technologies.

Inhalt
I Applications.- Monomode Active Fibre Devices: The Effects of Overlay Index.- Vibration Sensor Using Integrated Optical Coupling Element.- Digital Optical Computing.- Step-Index Profile Microlenses Formed in Glass.- Spherical Waveguide Multiplexing Device.- Sensor Applications of Low Finesse Integrated Optical Fabry-Perot Resonators.- Fiber Optic Mach-Zehnder Interferometer Based on Lithium Niobate Components.- II Material and Fabrication.- Applications of Electron Beam Lithography to Integrated Optics.- Laser Beam Photolithographic System for Integrated Optics Applications.- Laser Induced Chemical Vapor Deposition of Metals for Electrical Contacts in Semiconductor Processing.- Electro-Optically Induced Optical Waveguide in KNbO3.- Single-Mode Magneto-Optic Waveguides in Multiple-Layer Garnet.- Normalized Diagrams for Diffused Waveguides Optical Properties: Application to Ti:LiNbO3 Electrooptic Directional Coupler Design.- Formation and Analysis of Tapers in Proton-Exchanged Lithium Niobate Waveguides.- Optical Damage Effects in LiNbO3:Ti Waveguides.- Direct Measurement of Refractive Index Profiles of Ti:LiNbO3 Slab Waveguides.- Buried Single-Mode Channel Waveguides in BK 7 by Field Assisted Cs-Ion Exchange.- Fabrication and Characterization of Buried Glass Waveguides with Symmetric Index Profile.- III Semiconductor-Devices.- Progress in Integrated Optics Lasers.- Optical Waveguide Properties of Multiquantum Wells.- Derivation of Modelling Parameters for GalnAs(P) Optical Amplifiers and Lasers.- Monolithic Integration of a Laser and Driving Circuits in GaAs/GaAlAs System for High Speed Optical Transmission.- Self-Consistent Analysis of Waveguiding in Phase-Locked Array Lasers.- GaAs-GaAlAs Y-Branch Interferometric Modulator.- High-Efficiency Phase Modulators in InGaAsP/InP.- Optical Waveguide Modulators and Switches in GaAs/GaAlAs Heterostructures.- Anti-Reflecting Mass Transported Windows for InGaAsP/InP Integrated Lasers.- Totally Reflecting Mirrors: Fabrication and Application in GaAs Rib Waveguide Devices.- Measurement of Semiconductor Optical Waveguide Loss Using a Fabry-Perot Interference Technique.- IV Modulators.- Parametric Processes in LiNbO3.- Electrooptic Modulators in Multilayered Zinc-Oxyde Waveguides.- Electro-Optic In-Line Frequency Translator: Performance Limitations.- LiNbO3 Optical Frequency Translators for Coherent Optical Fibre Systems.- Low Frequency Collinear Acoustooptic TM0-TE0 Mode Conversion and Single Sideband Modulation in Proton-Exchanged LiNbO3 Optical Waveguides.- A Simple and Wide Optical Bandwidth TE/TM Converter Using Z Propagating LiNbO3 Waveguides.- V Fundamentals and Waveguiding.- Nonlinear Third Order Integrated Optics.- Optimized Structure of Ti:LiNbO3 Channel Waveguides for Optical Parametric Oscillators.- Single Mode Channel Waveguide Polarizer on LiNbO3.- Greatly Reduced Losses for Small-Radius Bends in Ti:LiNbO3 Waveguides.- Reduction of Bend-Losses in Integrated Optics Devices.- Integrated Optical Wavelength Multiplexer/Demultiplexer for Optical Communication.- Design of an Integrated Optic Grating Demultiplexer.- Integrated-Optical 8 × 8 Star Coupler on Ti:LiNbO3.- Performances of an Ion Exchanged Star Coupler for Multimode Optical Communicatios.- Optimization of Ti:LiNbO3 Directional Couplers and Their Application to a Mach-Zehnder Interferometer Modulator.- Measurement of Guided Mode Cut Off Wavelengths in Ti:LiNbO3 Channel Waveguides.- Index of Contributors.