Paper preprint is here: <a href="https://arxiv.org/html/2502.06702v1" rel="nofollow">https://arxiv.org/html/2502.06702v1</a><p>The improvement is a device that enables laser power to be increased to ~1 MW, lowering the photon shot noise floor. The device counters thermal distortion of a mirror by projecting black body radiation onto the mirror, causing opposing distortion.