title: Determination of absolute mode number using two mode-locked laser combs in optical frequency metrology.
abstract: The mode number of the comb line involved in the optical frequency measurement was determined using two mode-locked, erbium-doped fiber laser combs operated at different repetition rates independently of the frequency fluctuation of the laser under measurement (LUM). A simple measurement process is presented to determine the difference in mode number between the two laser combs and the comb mode number, yielding the absolute frequency of the LUM.
authors.affiliation: Center for Measurement Standards, 321, Section 2, Kuang Fu Road, Hsinchu 30042, Taiwan. jlpeng@itri.org.tw
authors.forename: Jin-Long
authors.initials: JL
authors.lastname: Peng
authors.forename: Ren-Huei
authors.initials: RH
authors.lastname: Shu