TY - JOUR AU - Jun Ye AU - T Yoon AU - John Hall AU - J Bernard AU - K Siemsen AU - L Marmet AU - J Chartier AU - A Chartier C2 - Physical Review Letters DA - 2000-01-01 LA - en M1 - 85 PB - Physical Review Letters PY - 2000 TI - Accuracy comparison of absolute optical frequency measurement between harmonic-generation synthesis and a frequency-division femtosecond-comb ER -