Holographic interference filters for infrared communications

Abstract

We demonstrate that high-quality interference filters for the wavelength range 1300 -1600 nm can be holographically fabricated in DuPont HRF-800X001 photopolymer material by use of visible laser illumination. We also summarize a chain-matrix technique, which we call thin-film decomposition, that is useful for modeling multilayer films with an arbitrary index profile n͑z͒. We use the thin-filmdecomposition technique to create design curves that allow one to choose the proper exposure angle and film thickness with which to fabricate a holographic interference filter with a desired transmission efficiency and bandwidth at a particular wavelength. These curves are of general utility and are not confined to any particular holographic recording medium. Excellent agreement between theory and experiment is found.

Fabrication and Characterization of Thick Zinc Methacrylate/Phenanthrenequinone Codoped Poly(methyl methacrylate) Photopolymers for Volume Holographic Recording

“…Photopolymers for holographic recording have a wide variety of optical applications, such as in communications, 1,2) displays, 3,4) bio-optical sensing, 5,6) and optical data storage. [7][8][9][10][11] The advantages of these materials are the ease of synthesis, high refractive index change, high sensitivity and good optical quality.…”

Analysis of multitone holographic interference filters by use of a sparse Hill matrix method

“…Such filters have been fabricated by vacuum sputtering 5 and also through holographic processes. 6,7 A comprehensive overview of methods for analyzing reflection of light from films of continuously varying refractive index has been published in the treatise by Jacobsson. 8 Jacobsson discusses a transfer-matrix method in which an inhomogeneous film is modeled as a stack of thin homogeneous layers; that technique is referred to herein as thin-film decomposition.…”