(ORDO NEWS) — A group of researchers from the Competence Center of NTI “Photonics” at Perm State National Research University and the Bulgarian Academy of Sciences has improved the technology for the production of photonic integrated circuits (FIS) based on lithium niobate.
The new method will increase the stability of data transmission systems by 2.5 times. This will improve the quality of communication in telecommunications and take a step towards the development of 5G and 6G technologies.
The research results are published in the journal MDPI Photonics . “Electro-optical modulators with lithium niobate crystals are widely used in telecommunication systems. However, such systems are not completely protected from signal distortion during data transmission.
The solution was found in a special technique for processing the surface of the crystal, which reduced losses and increased the stability of the system, ”says Roman Ponomarev, a senior researcher at the Photonica Competence Center of NTI, head of the integrated photonics laboratory at Perm State National Research University.
In the course of research, scientists have found that the near-surface layer of the crystal , on the basis of which optical modulators are assembled, has a distorted structure, which leads to signal loss and a decrease in the stability of optical characteristics. The solution to this problem requires preliminary processing of the crystal and investigation of its structure by X-ray methods.
As a result of the research, a method was proposed for “healing” the near-surface layer of the crystal, when the crystal is heated to a temperature of 350 degrees Celsius, kept at this temperature for five hours and slowly cools down. This approach makes it possible to significantly reduce the number of mobile ions in the near-surface layer of the crystal, which leads to an increase in the stability of signal transmission.
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