Laser program annual report, 1975

Characteristics of Nd3+ ions in sol–gel derived silicate glass in presence of Al(NO3)3 and the 4F3/2→4I11/2 transition

“…In this respect non-linear parameterization of materials can be used as an effective tool, specially for cases where transitions depend on X 2 . Non-linear parameters like Abbe number (t e ), non-linear refractive index (n 2 ) provide vital information with regard to optical activity and quality of materials [24,25]. Materials with Abbe number -that defines dispersive power -between 50 and 100 are considered optically active.…”

“…Abbe number, the optical quality determining factor can be derived using measured refractive indices corresponding to three wavelengths as [26] t e ¼ n e À 1 n F 0 À n c 0 : ð3Þ n e ; n 0 F and n 0 c are refractive indices at k 0 F ¼ 546:1 nm (green), k 0 F ¼ 480:0 nm (blue) and k 0 c ¼ 643:9 nm (red), respectively. A large Abbe number (t e ) together with small non-linear refractive index (n 2 ) [25] and its co-efficient (c) derived from [27] …”

Effect of CdS nanoparticles on fluorescence from Sm3+ doped SiO2 glass

“…They suggested the necessity of small non-linear refractive index to minimize environmental effect on dopant ions. Glass [35], on other hand defined material to be optically active on the basis of dispersive power. The materials that have an Abbe number ð ¼ 1=dispersivepowerÞ of 50-100 are considered optically active materials.…”

“…The materials that have an Abbe number ð ¼ 1=dispersivepowerÞ of 50-100 are considered optically active materials. Following the procedure of [34][35][36][37], we calculated the non-linear properties of the materials viz., Abbe number, dispersive power, non-linear refractive index, non-linear refractive coefficient and susceptibility.…”

Structural, optical and non-linear investigation of Eu3+: Al(NO3)3-SiO2 sol-gel glass

“…They suggested the necessity of small non-linear refractive index to minimize environmental effect on dopant ions. Glass (1975), on the other hand, defined materials to be optically active on the basis of their dispersive power. Accordingly, materials possessing Abbe number (ν e ), the popular way to define dispersive power, between 50 and 100 are regarded as optically active.…”