【摘要】 介绍了2005年诺贝尔物理学奖的获奖工作-用锁模飞秒激光光梳去测量光的频率。飞秒激光光梳技术大大简化了光频的测量。锁模飞秒激光通过光子晶体光纤时,由于自相位调制,在可见光和近红外区能够产生上百万等间隔的梳状频率,其频率间隔等于锁模脉冲的重复率。利用光频梳和倍频技术,把对光频的测量变为对射频的测量,这样就能够很容易地测出光的频率。使得光频测量精度和原子钟精度达到前所未有的高度,从而对物理学和计量学的发展有重要意义。更多还原

【Abstract】 The work of the winners of the 2005 Nobel prize in physics is briefly reviewed.They measured the frequency of light with mode-locked laser comb.Femtosecond laser-frequency comb techniques are vastly simplifying the measurement.A single mode-locked femtosecond laser,its spectrum broadened by self-phase modulation in a photonic crystal fiber,can produce millions of sharp laser lines in a precise evenly spaced grid spanning much of the visible and near-infrared spectrum,the spacing of the frequency equal to the repetition of the mode- locked pulse.They measured the radio frequency instead of optical frequency measurement with optical frequency comb and technology of octave-spanning.This is a significant step toward precision of optical frequency measurement and precision of atomic clock and a new brilliancy in physics and metrology.更多还原