title: Dispersion of barium gallogermanate glass.
abstract: 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 microm. 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-Ga2O3-GeO2 glass from 0.4 to 5.0 microm and calculated the Sellmeier coefficients required for optical device design.
authors.affiliation: Materials Directorate, U.S. Air Force Research Laboratory, Wright-Patterson Air Force Base, Ohio 45433-7707, USA. david.zelmon@wpafb.af.mil
authors.forename: David E
authors.initials: DE
authors.lastname: Zelmon
authors.forename: Shyam S
authors.initials: SS
authors.lastname: Bayya
authors.forename: Jasbinder S
authors.initials: JS
authors.lastname: Sanghera
authors.forename: Ishwar D
authors.initials: ID
authors.lastname: Aggarwal