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High-precision grating period measurement

Thanarwut Photia, Wipawee Temnuch, Sorakrai Srisuphaphon, Nuttanan Tanasanchai, Waranont Anukool, Kunaree Wongrach, Pachara Manit, Surasak Chiangga, and Sarayut Deachapunya

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Abstract

We introduce a method for measuring a periodic structure, particularly a grating period. The method is based on the high-precision laser Talbot effect. The combination of a rubidium-locked external cavity diode laser and the Talbot interferometer provides an excellent and simple tool for this purpose. Some experimental results are provided to demonstrate the approach.

© 2019 Optical Society of America

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