Bezpaly, A D, and V M Shandarov. “Channel Optical Waveguides With Spatial Longitudinal Modulation of Their Parameters Induced in Photorefractive Lithium Niobate Samples”. KnE Engineering 3, no. 5 (May 7, 2018): 147–155. Accessed September 14, 2025. https://knepublishing.com/index.php/KnE-Engineering/article/view/2237.