All-Optical Spatial Self-Phase and Cross Phase Modulation Using an NLO Active Pyrylium Dye towards an Optical OR Gate

IF 3 4区化学 Q3 CHEMISTRY, PHYSICAL

ChemPhotoChem Pub Date : 2025-01-10 DOI:10.1002/cptc.202400334

Safna Saif, Lekshmi Lekshmanan, Karthika Sankar, Titu Thomas, Saju Pillai, Ayyappanpillai Ajayaghosh, Priya Rose Thankamani

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Abstract

All-optical modulation and optical switching with nonlinear materials are integral parts of the advancing all-optical communication network. This report discusses the synthesis of a promising pyrylium dye, pyrylium-NH₂ for NLO based applications and probes its spatial self-phase and cross phase modulation (XPM) properties. This dye can be effectively used for all-optical modulation and OR logic gate operation. A 532 nm DPSS laser of tunable power is used to study the intensity dependent nonlinear refractive indices (n₂) of the dye in ethanol, methanol and acetone. The dye has shown significant n₂ compared to the existing literature. Concentration dependence, incident intensity dependence and temporal evolution of the far field diffraction annuli rings in these three solvents were studied. The all-optical modulation of a weak signal beam is demonstrated using a high intensity pump beam via cross phase modulation, paving the way to optical switching applications.

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利用NLO活性吡啶染料对光或门进行全光空间自相位和交叉相位调制

利用非线性材料进行全光调制和光开关是不断发展的全光通讯网络不可或缺的组成部分。本报告讨论了一种用于 NLO 应用的前景广阔的芘染料--芘-NH2 的合成，并探究了其空间自相位和跨相位调制 (XPM) 特性。这种染料可有效用于全光调制和 OR 逻辑门操作。利用功率可调的 532 nm DPSS 激光器研究了该染料在乙醇、甲醇和丙酮中的非线性折射率（n2）。与现有文献相比，该染料显示出明显的 n2。研究了这三种溶剂中远场衍射环的浓度依赖性、入射强度依赖性和时间演化。通过交叉相位调制，利用高强度泵浦光束演示了对微弱信号光束的全光学调制，为光学开关应用铺平了道路。

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来源期刊

ChemPhotoChem Chemistry-Physical and Theoretical Chemistry

CiteScore

5.80

自引率

5.40%

发文量

165

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