作者: R. Holzwarth , M. Zimmermann , T. Udem , T.W. Hansch
DOI: 10.1109/3.970894
关键词: Laser 、 Optical fiber 、 Radio frequency 、 Comb filter 、 Ultrashort pulse 、 Frequency comb 、 Self-phase modulation 、 Optics 、 Physics 、 Comb generator
摘要: Femtosecond laser-frequency comb techniques are vastly simplifying the measurement and synthesis of optical frequencies. A single mode-locked femtosecond laser, with its spectrum broadened by self-phase modulation in a microstructured or tapered nonlinear fiber, can produce millions of sharp laser lines in a precise evenly spaced grid spanning much of the visible and near-infrared spectrum. The absolute frequency of each line is determined by two observable radio-frequency signals. The pulse repetition rate gives the spacing of the …