Speaker
Description
In recent experiments we have demonstrated that tunable coherence interferometry is a viable technique to provide significant scattered light suppression at low frequencies in table-top implementations of Michelson, Sagnac and power-recycled Michelson interferometers. While our findings open up various opportunities, they are not sufficient to decide if this technique is actually applicable to the main interferometers of gravitational wave detectors. Important questions remain, specifically related to the operation of kilometer-long optical cavities and to the compatability with quantum noise reduction via squeezed light. This contribution will review what has been achieved so far and will sketch out the way forward for future experimental and analytical work. And, we will discuss the possible impact of tunable coherence on other limiting detector noise sources and overall detector design to stimulate a discussion on possible show-stoppers and its potential for the field.