Abstract

The requirements for low-loss optical materials for use on excimer lasers have stimulated the investigation of optical absorption in a variety of highly transparent materials at visible and uv wavelengths. To provide information over a wide spectral range at low absorption levels (≃10⁻⁵ cm⁻¹), laser calorimetric and wavelength modulation spectroscopic techniques were used. Blending these two methods provided, for the first time, spectral information well below the usual levels of absorption measured in studies of the Urbach tail.

© 1978 Optical Society of America

Infrared wavelength modulation spectroscopy of some optical materials

Ryu K. Kim and Rubin Braunstein
Appl. Opt. 23(8) 1166-1177 (1984)

Thin-film 2.8-μm and 3.8-μm absorption in single-layer films

James A. Harrington, J. Earl Rudisill, and Morris Braunstein
Appl. Opt. 17(17) 2798-2801 (1978)

Infrared absorption in chemical laser window materials

James A. Harrington, Don A. Gregory, and William F. Otto
Appl. Opt. 15(8) 1953-1959 (1976)

Automation of a laser absorption calorimeter

T. J. Moravec and E. Bernal G.
Appl. Opt. 17(12) 1938-1943 (1978)

Thin-film absorption coefficients by attenuated-total-reflection spectroscopy

R. T. Holm and E. D. Palik
Appl. Opt. 17(3) 394-403 (1978)