The optical filter is resonator based. The required passband shape of ring resonator-filters can be custom designed by the use of configurations of various ring coupled resonators. This book describes the current state-of-the-art on these devices. It provides an in-depth knowledge of the simulation, fabrication and characterization of ring resonators for use as example filters, lasers, sensors.

D. G. Rabus is an internationally recognized photonics & sensor expert with an extensive track record of accomplishments in bridging academia and industry by way of numerous patents, path leading publications and books. Dr. Rabus holds a lecturer position at Reutlingen University, Germany, and is owner of RABUS.TECH, a technology consulting company enabling productization of key enabling technologies. C. Sada is Professor in Experimental Physics of Condensed Matter at the University of Padova, Italy, with more than 250 internationally peer-reviewed publications. Her research focus is on integrated optics, opto-microfluidics and sensing by combining the material doping, growth and characterization of nano- to micro-scale properties.