UKRI-2121 LISA Optical Bench Baseplate

The LISA concept for directly detecting the oscillating strain in spacetime caused by gravitational waves shares the scheme used in all laser interferometer-based gravitational wave detectors: The passage of the wave is detected by measuring the time-varying changes of optical pathlength between test masses isolated from all forces other than gravitational waves.

The project draws on experience gleaned from the LISA Pathfinder (LPF) mission, a pioneering mission to test the LISA concept and demonstrate key concepts and technologies. A key technology to the LISA mission is performing interferometry with hydroxide catalysis bonded optics and this was demonstrated on LPF.