We have developed a facility for measuring the transmittance of optical filters at a wavelength of 1064 nm, using a Nd:YAG laser, a power stabilizer, and linear photodiode detectors. A direct measurement method was used for filters with optical densities (OD’s) less than or equal to 4, and a reference substitution technique was used for filters with OD’s as great as 10. The apparatus and data-acquisition system are described. Measurement results for a set of filters are presented. The expanded uncertainties for the measured OD and deduced absorption coefficient are determined through a detailed analysis of all the uncertainty components.
© 1997 Optical Society of America
Original Manuscript: March 5, 1997
Revised Manuscript: June 16, 1997
Published: December 1, 1997
Z. M. Zhang, T. R. Gentile, A. L. Migdall, and R. U. Datla, "Transmittance measurements for filters of optical density between one and ten," Appl. Opt. 36, 8889-8895 (1997)