Gallogermanate glasses are the subject of intense study as a result of their unique combination of physical and optical properties, including transmission from 0.4 to beyond 5.0 μm. These glasses can be easily made into large optics with high-index homogeneity for numerous U.S. Department of Defense and commercial visible-IR window applications such as reconnaissance, missile domes, IR countermeasures, avionics, and collision avoidance on automobiles. These applications require a knowledge of the refractive index of glass throughout the region of transmission. Consequently, we have measured the refractive index of BaO-Ga<sub>2</sub>O<sub>3</sub>-GeO<sub>2</sub> glass from 0.4 to 5.0 μm and calculated the Sellmeier coefficients required for optical device design.
© 2002 Optical Society of America
David E. Zelmon, Shyam S. Bayya, Jasbinder S. Sanghera, and Ishwar D. Aggarwal, "Dispersion of Barium Gallogermanate Glass," Appl. Opt. 41, 1366-1367 (2002)