Publication: Property investigation of photorefractive crystal using transport of intensity technique
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Issued Date
2020
Resource Type
File Type
application/pdf
ISSN
0277786X
Other identifier(s)
2-s2.0-85082690565
Rights Holder(s)
Scopus
Bibliographic Citation
Proceedings of SPIE - The International Society for Optical Engineering. Vol 11331, (2020)
Suggested Citation
Poungprasert M., Plaipichit S., Bantitadawit P., Buranasiri P. Property investigation of photorefractive crystal using transport of intensity technique. Proceedings of SPIE - The International Society for Optical Engineering. Vol 11331, (2020). doi:10.1117/12.2553988 Retrieved from: https://hdl.handle.net/20.500.14740/4807
Abstract
The purpose of the study was to investigate of photorefractive Bragg gratings within iron-doped lithium niobate crystals with the size of seven cubic millimeters. Polarized helium-neon laser beams with a wavelength of 633 nm have been separated into two beams and then incident on the crystal with different angles. Both beams were used for writing the grating in the crystal with the incident angle (2θ). and the angle between both beams has been founded the highest efficiency of diffraction beams. Then the transport of intensity method was used to explore the grating characteristics by using the opposite polarization of the writing helium-neon laser beam. Images in focus and defocus before and after the focal plane was recorded on a Canon digital camera. Then, these images were used to process by computer programing based on the principle of transport of intensity equation. By using this technique, the grating characteristics in lithium niobate crystals would be investigated. © 2020 SPIE.