Characterization of Transmission Gratings in Photorefractive Materials

Authors

Diego Figueroa, St. Mary's
Austin Scott, St. Mary’s University
Partha Banerjee, St. Mary’s University

Files

Digital Publisher

Digital Commons at St. Mary's University

Publication Date

2025

Keywords

diffracted beam powers; transmission; photorefractive

Description

Measuring the transmitted and diffracted beam powers while writing and/or probing the grating with a writing or probe beam is a simple characterization method of transmission gratings. The transmission grating is written in a doped lithium niobate crystal using an argon laser beam of 514.5 nm wavelength. This transmission grating is probed using a helium-neon 632.6 nm laser beam at appropriate Bragg incidence. By scanning the probe beam across the grating, the transmission grating profile can be characterized. The two-beam coupling process is shown in Figure 1 and is due to the space charge field set up in a photorefractive material as shown in Figure 2

Format

pdf

City

San Antonio, Texas

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-No Derivative Works 4.0 International License.