Absolute frequency measurement of F=4 → F'=5 line of cesium D2 in an optical clock configuration with amplified optical comb

The selected and amplified optical frequency comb by using diode laser is used in an optical clock configuration to measure the absolute frequency of stabilized ECDL. The ECDL is stabilized to F = 4 → F = 5 transition line of cesium D2 line with modulation transfer spectroscopy. The measured frequency is f
_ECDL
= 351 721 960 529 kHz with a statistical uncertainty of 3.5 kHz.