Open AccessModulation Transfer Spectroscopy of Coherent Population Trapping based on phase-coherent lasers
Author(s) -
Xuewei Qi,
Wen Lan Chen,
Yandan Lin,
Xiao Ji Zhou,
Xu Zong Chen
Publication year - 2009
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.17.006741
Subject(s) - laser linewidth , optics , spectroscopy , laser , phase modulation , population , physics , modulation (music) , coherent spectroscopy , semiconductor laser theory , materials science , trapping , phase noise , spectral line , frequency modulation , phase (matter) , telecommunications , coherent anti stokes raman spectroscopy , radio frequency , raman spectroscopy , ecology , demography , quantum mechanics , astronomy , sociology , raman scattering , computer science , acoustics , biology
A new source of two diode laser beams, spatially separated but optically phase-locked with each other, is used to study the modulation transfer spectroscopy of coherent population trapping resonance (CPT). The spectrum for the (87)Rb D2 line is obtained with narrow linewidth and high signal-to-noise ratio, and analyzed with different experimental parameters. A theoretical analysis of the CPT modulation transfer spectra is deduced from the density matrix equation of motion, and found to be in good agreement with the experimental results.