Optical frequency measurements using fs-comb generators. - Harald Schnatz; Burghard Lipphardt; Carsten Degenhardt; Ekkehard Peik; Tobias Schneider; Uwe Sterr; Christian Tamm (IEEE Trans. Instrum. Meas., 2005)

171Yb+ Single-Ion Optical Frequency Standard at 688 THz. - Christian Tamm; Burghard Lipphardt; Harald Schnatz; Robert Wynands; Stefan Weyers; Tobias Schneider; Ekkehard Peik (IEEE Trans. Instrum. Meas., 2007)

The Stability of an Optical Clock Laser Transferred to the Interrogation Oscillator for a Cs Fountain. - Burghard Lipphardt; Gesine Grosche; Uwe Sterr; Christian Tamm; Stefan Weyers; Harald Schnatz (IEEE Trans. Instrum. Meas., 2009)