High-speed long-delay optical delay line based on a mirror array structure mounted on the upper surface of a rotating disk

To address the limitation that existing optical delay lines struggle to simultaneously achieve both high scanning speed and a long delay time, we designed and constructed a rotary optical delay line based on a 36-facet tilted mirror array. By performing mathematical simulations, we optimized and determined all key parameters, ultimately achieving a delay time of 94.44 ps and a scanning speed of 1800 Hz simultaneously, together with a high detection accuracy. Our design offers a high-speed scanning solution for the advancement of optical delay lines.