Optical and physical properties of lanthanum gallogermanate glasses

Optical properties of lanthanum gallogermanate glasses were investigated by infrared (IR) transmission and IR reflectivity measurements. Several physical properties of these glasses, including density, index of refraction and ultrasonic velocities, were also measured. The experimental results are used to obtain elastic constants. These glasses are transparent over frequencies ranging from the near ultraviolet to the mid-IR (similar to 8 mu m) and have ionic bond properties in their structure. (C) 1998 Elsevier Science B.V. All rights reserved.