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-Ga2O3-GeO2 glass from 0.4 to 5.0 µm and calculated the Sellmeier coefficients required for optical device design.
© 2002 Optical Society of America
Original Manuscript: April 23, 2001
Revised Manuscript: October 31, 2001
Published: March 1, 2002
David E. Zelmon, Shyam S. Bayya, Jasbinder S. Sanghera, and Ishwar D. Aggarwal, "Dispersion of barium gallogermanate glass," Appl. Opt. 41, 1366-1367 (2002)