Subsurface photorefractive effect in LiNbO3 under high-power 248 nm laser irradiation

Alexander M. Razhev; Sergei N. Bagayev; Iosif B. Barkan; Dmitry V. Petrov; Andrey A. Zhupikov

doi:10.1117/12.479248

17 October 2003 Subsurface photorefractive effect in LiNbO₃ under high-power 248-nm laser irradiation

Alexander M. Razhev, Sergei N. Bagayev, Iosif B. Barkan, Dmitry V. Petrov, Andrey A. Zhupikov

Proceedings Volume 4977, Photon Processing in Microelectronics and Photonics II; (2003) https://doi.org/10.1117/12.479248
Event: High-Power Lasers and Applications, 2003, San Jose, CA, United States

Abstract

A phenomenon of a strong irreversible variation of the refractive index (Δn approximately equals - 0.2) in a subsurface layer of the lithium niobate crystal has been observed. The effect arises under the strong absorption of high-power radiation with wavelength 248 nm of KrF excimer laser. The characteristics of the subsurface photorefractive effect (SPRE) were identified by using the data on measurements of the reflection coefficient of a crystal and of the diffraction efficiency of a recorded phase grating. About 40% of niobium and oxygen atoms has been found to be displaced from the lattice points in the 350 ± 50 angstrom subsurface layer. This phenomenon was used for creation of some integrated optics elements.

Citation Download Citation

Alexander M. Razhev, Sergei N. Bagayev, Iosif B. Barkan, Dmitry V. Petrov, and Andrey A. Zhupikov "Subsurface photorefractive effect in LiNbO₃ under high-power 248-nm laser irradiation", Proc. SPIE 4977, Photon Processing in Microelectronics and Photonics II, (17 October 2003); https://doi.org/10.1117/12.479248

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