Ultra-Low Mean-Photon-Number Measurement with Balanced Optical Heterodyne Detection
Gang Li, 李丽萍, 杜志静, Tao Liu, 张天才, 王军民 · Acta Scientiarum Naturalium Universitatis Sunyatseni · 2004
Determination of an ultra-low mean photon number is an important issue, either for precise optical measurement or understanding the interaction between individual atoms and photons inside an optical cavity. By utilizing a homemade balanced optical heterodyne detection system, the cw minimum measurable power of 3.6 fW has been