A coupled wave analysis is given of the Bragg diffraction of light by thick hologram gratings, which is analogous to Phariseau's treatment of acoustic gratings and to the “dynamical” theory of X-ray diffraction. The theory remains valid for large diffraction efficiencies where the incident wave is strongly depleted. It is applied to transmission holograms and to reflection holograms. Spatial modulations of both the refractive index and the absorption constant are allowed for. The effects of loss in the grating and of slanted fringes are also considered. Algebraic formulas and their numerical evaluations are given for the diffraction efficiencies and the angular and wavelength sensitivities of the various hologram types.

Coupled wave theory for thick hologram gratings

An analysis of laser action in a periodic structure is presented. A model of two counter‐running waves coupled by backward Bragg scattering is used. The resonant frequencies and threshold criteria for the modes of oscillation have been determined for both index and gain periodicities. Analytical approximations are given for both the high‐ and low‐gain cases, and computational results for the intermediate regimes.

Coupled‐Wave Theory of Distributed Feedback Lasers

The motion of energetic charged particles inside a monocrystalline solid can be strongly influenced by channeling and blocking effects. The present article reviews the theory, the experimental studies, and some of the applications of these effects. The coverage of the published literature extends through June 1973.

Channeling and related effects in the motion of charged particles through crystals

Reference LPI-ARTICLE-1999-017View record in Web of Science Record created on 2006-02-21, modified on 2017-05-12

/pdf/metal-oxide-surfaces-and-their-interactions-with-aqueous-22jt31pax0.pdf

Metal Oxide Surfaces and Their Interactions with Aqueous Solutions and Microbial Organisms.

Holography, coherent light amplification and optical phase conjugation with photorefractive materials

Dynamical Diffraction of X Rays by Perfect Crystals

We are always interested in finding ways to increase our effectiveness as scientists. One way to do this is to see if there are better tools to help us in the jobs we face, or more effective ways of using the tools that we have. Attaching a computer to an instrument makes a powerful new instrument; any instrument, and almost any computer. A computer in itself is not an instrument, but when attached to any instrument it is. Thus, this is a possible technique for increasing our effectiveness which may apply to many disciplines. Rather than describe a specific instance, although I will give examples, I will try instead to give an overview of this type of growing activity, and try to state where I think it is heading. In this sense, this is somewhat of a selected version of what is going on in “Lab Automation”.

Henderson Cole

Papers

Dynamical Diffraction of X Rays by Perfect Crystals

Growth Path for Computers in Automated Analysis