Generation and metrological application of optical frequency combs

This paper reviews basic types of optical-frequency comb generators (OFCGs) and discusses possible applications in metrology. One interesting issue, n amely active control of the OFCG resonance frequency with respect to the in put frequency, is addressed in more detail. It is indispensable for long-te rm power stabilization of high-order sidebands. Experimental results will b e presented which leave been obtained using a novel approach to this proble m that relies on observing sharp resonances of the OFCG cavity using an aux iliary, orthogonally polarized input signal.