The research project on simulating the superfield phenomenon in nonlinear tellurite optical fibres, conducted by a team from the Faculty of Materials Science and Technology at the University of Science, Viet Nam National University Ho Chi Minh City (VNUHCM), achieved significant success. This opened up potential applications in various scientific and technological fields and confirmed the contribution of Vietnamese scientists to international optics research.

On 19 February, at Room I.12, VNUHCM-University of Science, the VNUHCM Scientific and Technological Project Evaluation Council held a meeting to assess the project titled “Simulation of Superfield Phenomenon for Mid-Infrared Light Conversion in Nonlinear Tellurite Fibres.” The project was led by Dr. Nguyễn Phước Trung Hòa, Vice Dean of the Faculty of Materials Science and Technology.

Project Assessment and Objectives

As the field of optics continued to advance, the study and application of mid-infrared light, especially in optical fibres, attracted considerable global attention. Mid-infrared light, with wavelengths ranging from 2 to 20 micrometres, was notable for its strong absorption by many organic and inorganic molecules. This made it a potentially invaluable resource, opening up new possibilities for applications in chemical detection, environmental analysis, and pollution control.

In this context, the team from the Faculty of Materials Science and Technology at VNUHCM-University of Science conducted an important study on creating special optical fibres made from tellurite material. The primary aim was to develop a nonlinear optical fibre capable of generating high-quality light in the mid-infrared range, thus unlocking new potential applications across various fields.

Superfield Simulation and Validation

After a thorough research and testing process, the team selected three suitable tellurite materials: TLWMN, TZNL, and TZLKAP. These materials, not only highly nonlinear but also safe and non-toxic, were ideal for fabricating optical fibres. This selection was a crucial step, as these materials exhibited superior light transmission capabilities, particularly in the mid-infrared range.

For the optical fibre to operate effectively, the team optimised its structure, adjusting key properties such as dispersion to ensure optimal light transmission. In particular, the team succeeded in simulating the process of generating a “superfield” – a special form of light with a broad spectrum and high coherence. This was a significant challenge, and the team developed an algorithm based on the nonlinear Schrödinger equation, programmed in Matlab, to accurately simulate this process. The research results were validated through international experiments, confirming the accuracy and reliability of the work.

This simulation not only helped the team identify the optimal conditions for generating an ideal superfield but also paved the way for the application of nonlinear tellurite optical fibres in scientific and technological devices. This achievement marked an important milestone in nonlinear optics research in Viet Nam.

Publication and Future Applications

The research findings were published in the prestigious international journal Results in Optics by Elsevier, confirming the contribution of Vietnamese scientists to the field of optics. This success served as evidence of the creativity and research potential of the Vietnamese scientific community and opened up numerous practical applications, including environmental sensors, material analysis, and biomedical imaging.

With these new discoveries, tellurite optical fibres are expected to become the foundation for advanced devices, contributing to environmental protection and improving human quality of life. This progress is not only of scientific value but also carries significant practical implications for sustainable development in the future.

For full details of the research, see: https://doi.org/10.1016/j.rio.2023.100576

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