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