Dr. Günter Spanner has been active in research and development for several major corporations for more than 30 years. Project and technology management in the fields of biosensors and physical measurement technologies form the core of his work. In addition to his role as a lecturer at ETH Zurich and EU|FH, the author has successfully published technical articles and books on a wide range of topics - from electronics to measurement and sensor technology, all the way to gravitational-wave physics. His contributions to the frequency stabilization of lasers found application in the field of direct gravitational-wave detection, which was awarded the Nobel Prize in 2017.