ArticleScientific reports2025
Exploring the thermal-induced optical nonlinearity of crude oil via spatial self-phase modulation technique.
Article in Scientific reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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2 citing papers in PubMed.
- The Thermo-Optic Effect in Norbixin: Characterization by Z‑Scan and Self-Phase Modulation under CW Laser.ACS omega · 2026Article
- Effect of Ultrasonic Treatment of Dispersed Carbon Nanocomposite Media on the Formation, Electrical Conductivity, and Degradation of a Hydrogel for Metallic Stimulation Electrodes.Gels (Basel, Switzerland) · 2025Article
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4 authors.
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Abstract
This study aims to investigate the nonlinear optical (NLO) characteristics of diluted crude oil samples from the Ramshir, Rag-e-Sefid, and Ahwaz-20 reservoir fields in the southwest region of Iran. Utilizing spatial self-phase modulation (SSPM) techniques, we measured the nonlinear refractive index ([Formula: see text]) by observing the intensity-dependent number of diffraction rings with continuous-wave laser beams at [Formula: see text] and [Formula: see text] wavelengths. This study focused on examining the [Formula: see text] ratios of different sample concentrations to identify the role of thermal effects in the observed NLO responses. Our findings indicate a direct correlation between the concentration of crude oil in the samples and their NLO properties, with thermal effects significantly influencing the changes in NLO responses. In the thermal region, the nonlinear refractive index was approximately determined to be [Formula: see text]. Additionally, the study explores the collapse of diffraction rings to further understand how the relative nonlinear refractive index varies with the sample concentration and incident intensity at both wavelengths. The results suggest that crude oil possesses promising NLO properties, making it potentially suitable for the development of new photonic devices and applications, especially in areas where thermal nonlinearities are crucial, such as sensing and all-optical technologies.
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