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Determination of absolute mode number using two mode-locked laser combs in optical frequency metrology
1Center for Measurement Standards, 321, Section 2, Kuang Fu Road, Hsinchu 30042, Taiwan. jlpeng@itri.org.tw
Optics Express
|June 18, 2009
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.

