Division of Electricity and Magnetism




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Address: No.18,Bei San Huan
Dong Lu,Chaoyang
Dist,Beijing,P.R.China, 100013



Programme and Project
  • Fiber Comb

    A femtosecond laser frequency comb based on an Er-doped fiber laser is developed. The Er-doped fiber comb consists of an Er-doped fs fiber laser, a two-stage fiber amplifier, a highly nonlinear fiber and a single-beam f-2f interferometer. With...

  • Ultra-compact Cs Fountain Clock

    The research of ultra-compact Cs fountain clock was lauched in 2008. By the end of 2009, the preliminary equipment of the clock has been completed with a frequency stability of better than 5.210-15 in one day. Works to improve the uncertainty...

  • National Science Foundation "Study of the Collisional Frequency Shifts in Cs Fountain Clocks"

    Project is supported by the National Natural Science Foundation of China (Grant No. 11174260, 2011- ) Project leader: Dr. Fang Fang (fangf@nim.ac.cn) Collisions play an important role in high precision Cs...

  • Strontium Optical Clock

    An optical lattice clock based on ultra narrow atomic transition of neutral strontium atoms is being built at this lab. The strontium atoms are cooled to a temperature of a few micro-Kelvin by a two-stage laser cooling. They are then loaded into...

  • Ultra Stable Lasers

    This project is pursuing to build ultra stable lasers as local oscillators for optical clocks. Being the 'tick' source of the atomic clock, the local oscillator must maintain highly stable to ensure the performance of the atomic clock. We built...

  • Ti: sapphire Femtosecond Frequency Comb

    A femtosecond optical frequency comb (FOFC) based on the Ti: Sapphire femtosecond laser is developed. The FOFC consists of a home-made Ti: Sapphire femtosecond laser, two spectral broadening parts, a single-beam f-2f interferometer and a beat-...