Fusion M1, introduced by Femtolasers Produktions GmbH, is an ultracompact Ti:sapphire laser oscillator with mode-locked average output power of >1 W, pulse duration of <12 fs, pulse energy of >13 nJ, and peak power of >1 MW, both at 75 MHz. Proprietary and patented dispersive mirror technology provides broadband intracavity group delay dispersion compensation. The oscillator integrates a pump module with a low-loss cavity design. Features include Femtolock repetition rate stabilization, bandwidth tunability and custom center wavelength control. Applications include seeding of amplifier chains, materials processing, coherent terahertz generation, time-resolved spectroscopy and multiphoton processes.