Development of nuclear pumped lasers (NPL) in the CFBR-II reactor is briefly reviewed. The results of the two NPL experiments in CFBR-II reactor are described. The first one focused on the principle of nuclear pumped laser, and 4-mW laser output power achieved. The second NPL experiment focused on the small signal gain and the efficiency of the nuclear pumped He-Ar-Xe gas mixture at 1.73 μm. The maximum laser power measured to be 45 mW when thermal neutron flux rate is 6.9 * 1014 cm^(-2)·s^(-1). The small signal gain at 1.73 μm by the Rigrod analysis method is to be 0.24%·cm^(-1), and the saturation intensity is fitted to be 36 W/cm^(2).