Cycle GmbH was founded with the mission of building innovative ultrafast technology for science and industry applications.

We are producing world-leading timing equipment that synchronizes RF and optical equipment to each other with sub-femtosecond resolution. Key developments for these technologies started more than a decade ago at MIT and have been improved at Deutsches Elektronen-Synchrotron (DESY). Sub-femtosecond synchronization across several kilometers has been demonstrated [1] and is currently being commercialized. Cycle GmbH, a DESY spinoff company founded by Prof. Franz X. Kaertner and other scientists, holds the exclusive license to commercialize the key synchronization technologies from his research at MIT.


Xin et al., “Attosecond precision multi-km laser-microwave network”, Light Sci. Appl., vol. 6, no. e16187, (2017).

A. J. Benedick, et al., “Optical flywheels with attosecond jitter”, Nature Photonics 6 (2012).

S.-W. Huang, et al., “High-energy pulse synthesis with sub-cycle waveform control for strong-field physics”, Nature Photonics 5 (2011).

J. Kim, et al., “Drift-free femtosecond timing synchronization of remote optical and microwave sources“, Nature Photonics 2 (2008).

Cycle offers:

Fully customized, complete solutions including fully-automated controls system
Or Standalone sub-systems
Or Detectors only