supported by the National Natural Science Foundation of China(No.61475139);the National Basic Research Program of China(No.2013CB329501);the National High Technology Research and Development Program of China(No.2013AA063901);the Fundamental Research Funds for the Central Universities(No.2017FZA3005)
A three-level lambda system driven by multicolor control, pump, and probe fields is investigated. The pump and probe fields are derived from the same laser with opposite propagating directions. Due to the Doppler effe...