Amplified spontaneous emissions 1 Atomic system 1 Atoms 1 Cesium 1 Cesium atom Continuous wave lasers 1 Efficiency 1 Entanglement generation 1 Experimental realizations 1 Four wave mixing Frequency conversions 1 Generation frequency 1 Nondegenerate four wave mixing 1 Optical data processing 1 Optical frequency conversion 1 Phase matching 1 Pumping (laser) 1 Quantum entanglement 1 Self-seeded 1 Two-pump 1