Laser acquisition experimental demonstration for space gravitational wave detection missions

The laser acquisition-pointing technique is one of the most important techniques for space gravitational wave detection missions, like Taiji program and LISA (Laser Interferometer Space Antenna) program. acquisition system suppresses deviation angle to 1 µ rad at receiving aperture. Corresponding 80 times telescope magnification, accuracy should reach camera. In order verify feasibility scheme, a ground simulation experimental designed constructed. simulates actual process from three aspects: optical path, scanning process. experiment, coupling between pointing considered by introducing DWS (Differential Wave-front Sensing) calibrate reference position camera read out precision. Due limited beam propagation distance in in-flat top properties transmitting will greatly affect Based on analysis influence, an improved scheme introduced. results indicate that can achieve sub-10 magnitude realizes methodological demonstration scheme. offer foundation theoretical basis Taiji/LISA