Discover how our partner Cycle GmbH uses MENHIR-1550 lasers to achieve the highest precision in time and frequency distribution for telescopes and particles accelerators facilities. Timing distribution aims to disseminate time or frequency signals between multiple instruments and locations separated by hundreds of meters, and the best way to do that is to use light. In this last application note, we show how multiple MENHIR-1550 lasers can be synchronized together to less than 0.12 fs of timing-jitter in a very simple and stable way to generate extremely accurate optical links.