title: Detection of saturated absorption spectroscopy at high sensitivity with displaced crossovers.
abstract: We present an unconventional experimental approach for detecting saturated absorption spectroscopy. Using this approach, crossover peaks are displaced, leaving out peaks corresponding to an atom's natural resonant frequencies. Sensitivity of detection can also be enhanced. Consequently, the spectrum could reflect the energy structure of atoms more explicitly. Without harmful influence from crossovers, the locking range of the error signal is significantly increased and the symmetry of the dispersion line shape is perfectly preserved, so reliability of frequency stabilization can be improved.
authors.affiliation: Institute of Quantum Electronics, School of Electronics Engineering Computer Science, Peking University, Beijing, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Duan
authors.forename: Xianghui
authors.initials: X
authors.lastname: Qi
authors.forename: Xiaoji
authors.initials: X
authors.lastname: Zhou
authors.forename: Xuzong
authors.initials: X
authors.lastname: Chen