FOKUS II — Space Flight of a Vacuum Compatible Dual Frequency Comb System

Since its invention in the late 1990s, the frequency comb technology revolutionized the world of optical frequency metrology [1] and is now widely available as of-the-shelf product around the globe. While promising use cases for space-based applications exist, the space technology readiness, particularly regarding miniaturization and ruggedness, remains an obstacle for its deployment. In April 2015 and January 2016 the first frequency comb system FOKUS I was launched into space on a TEXUS sounding rocket, demonstrating the robustness and reliability of the technology [2].