Probe gain in two-photon pumped three-level systems is analyzed, and its similarities and differences with usual three-level systems are discussed. We show that here, the Stark splitting originates from nonresonant oscillating population components. It can disappear for certain values of the relevant oscillator strengths.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering