Nd (3+) activated fluoroborosilicate glassesJudd-Ofelt (JO) analysisLasing characteristicsCross-relaxationUp-conversionSPECTROSCOPIC PROPERTIESOPTICAL-PROPERTIESUP-CONVERSIONLUMINESCENCE PROPERTIESPHOSPHATE-GLASSESENERGY-TRANSFERNEODYMIUM IONSRED EMISSIONBISMUTHALKALI