Optical pumping and coherence effects in fluorescence from a four level system

Optical Pumping Effect of Four-Level System in Doppler-Free Laser Spectroscopic Techniques

Induced coherence and optical bistability in a four-level system with incoherent pumping

Optical Pumping Effect of Four-Level System in Doppler-Free Laser Spectroscopic Techniques (With 3 Figures)

Coherent Population Trapping and Resonance Fluorescence in a Closed Four Level System

Effects of spontaneously generated coherence on resonance fluorescence in a microwave-driven four-level atomic system

Non-Linear Effects and Coherence Phenomena in Optical Pumping