The purpose of this work is to describe a direct method for determining thermal dependence of the refractive indices of bulk materials and waveguiding film structures. The technique is alternative to standard ones, which require prism-shaped specimens, and decidedly simple than other new methods based on planar grating structures.
© 1997 Optical Society of America
Giuseppe Cocorullo, Francesco G. Della Corte, and Ivo Rendina, "Measurement of the Thermo-Optic Coefficient in Bulk and Waveguiding Structures by Multiple-Beam Interferometry," Appl. Opt. 36, 9101-9102 (1997)