@article{9680635ef68747d7a26fbb7422092355,
title = "Quantitative measurement for the modulation of photorefractive index gratings",
abstract = "The modulation of a photorefractive index grating, Δn, can be estimated by counting the number of peaks in the curve for the diffraction efficiency as a function of time under the phase matching condition. The accuracy for this method is about 13%. Here a new method is proposed, in which we improve the measurement accuracy to about 1%, by adding the measurement for the diffraction efficiency as a function of the angle mismatch. This precise Δn measurement allows us to quantify photorefractive effects with greater accuracy.",
keywords = "Grating index modulation, Lithium niobate, Optical storage recording materials, Photorefractive index, Volume holographic materials",
author = "Donn, {Shoang C.} and Tu, {Chung Chen} and Sun, {Ching Cherng} and Chen, {Ming Tsung}",
note = "Funding Information: The research is supported by the National Science Council of the Republic of China through contract NSE 89-2215-E-033-002. The authors are indebted to Dr. Wei B. Lee for his helpful discussions.",
year = "2002",
month = jun,
doi = "10.1117/1.1476941",
language = "???core.languages.en_GB???",
volume = "41",
pages = "1346--1349",
journal = "Optical Engineering",
issn = "0091-3286",
number = "6",
}