Abstract

We propose a simple and accurate method for measuring the refractive index and the absorption coefficient of an absorbing parallel plate. The method is essentially based on transmittance measurement with minimum reflectance at the Brewster angle for p-polarized light, which enables us to measure a low absorption loss of the order of $0.1\mathrm{dB}∕\mathrm{cm}$ for a typical plate thickness of $1\mathrm{mm}$. The error that is due to the approximation used is practically negligible, and the accuracy of measured results depends mainly on the variations in the flatness and parallelism of the two surfaces of the sample and on instrumental errors.

© 2006 Optical Society of America

Critically coupled resonators in vertical geometry using a planar mirror and a 5 nm thick absorbing film

Jonathan R. Tischler, M. Scott Bradley, and Vladimir Bulović
Opt. Lett. 31(13) 2045-2047 (2006)

Brewster-angled chirped mirrors for broadband pulse compression without dispersion oscillations

Peter Baum, Markus Breuer, Eberhard Riedle, and Günter Steinmeyer
Opt. Lett. 31(14) 2220-2222 (2006)

In situ measurement of absorption in high-power interferometers by using beam diameter measurements

David Ottaway, Joseph Betzwieser, Stefan Ballmer, Sam Waldman, and William Kells
Opt. Lett. 31(4) 450-452 (2006)

Coupled absorption filters for thermal detectors

Yuyan Wang, Benjamin J. Potter, and Joseph J. Talghader
Opt. Lett. 31(13) 1945-1947 (2006)

Polymer saturable absorber materials in the 1.5 μm band using poly-methyl-methacrylate and polystyrene with single-wall carbon nanotubes and their application to a femtosecond laser

Masataka Nakazawa, Seiji Nakahara, Toshihiko Hirooka, Masato Yoshida, Toshikuni Kaino, and Kyoji Komatsu
Opt. Lett. 31(7) 915-917 (2006)