Direct RF to optical frequency measurements with a femtosecond laser comb. - Scott A. Diddams; David J. Jones; Jun Ye; Steven T. Cundiff; John L. Hall; Jinendra K. Ranka; Robert Windeler (IEEE Trans. Instrum. Meas., 2001)

The BIPM laser standards at 633 nm and 532 nm simultaneously linked to the SI second using a femtosecond laser in an optical clock configuration. - Long Sheng Ma; Lennart Robertsson; Susanne Picard; Jean-Marie Chartier; H. Karlsson; E. Prieto; Robert Windeler (IEEE Trans. Instrum. Meas., 2003)

Building a frequency-stabilized mode-locked femtosecond laser for optical frequency metrology. - Hyeyoung Ahn; Ren-Huei Shu; Robert Windeler; Jin-Long Peng (IEEE Trans. Instrum. Meas., 2005)

International comparisons of femtosecond laser frequency combs. - Long Sheng Ma; Zhiyi Bi; Albrecht Bartels; Lennart Robertsson; Massimo Zucco; Robert Windeler; Guido Wilpers; Chris Oates; Leo Hollberg; Scott A. Diddams (IEEE Trans. Instrum. Meas., 2005)

Absolute frequency measurement of the R(12) 26-0 and R(106) 28-0 transitions in 127I2 at λ=543 nm. - Long Sheng Ma; Susanne Picard; Massimo Zucco; Jean-Marie Chartier; Lennart Robertsson; Petr Balling; Petr Krin; Jin Qian; Zhongyou Liu; Chunying Shi; Miguel Viliesid Alonso; Gan Xu; et al. (IEEE Trans. Instrum. Meas., 2006)