Methods of Measurement Propagation Losses in Thin Film Lithium Niobate Waveguides

IF 0.48 Q4 Physics and Astronomy

Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2026-02-19 DOI:10.1134/S1062873825714965

M. A. Vetoshkin, E. D. Voblikov, V. A. Zhuravlev, A. V. Bulatova, D. N. Moskalev, A. A. Kozlov, U. O. Salgaeva, V. V. Krishtop

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Abstract

We studied the methods for measuring propagation losses in thin-film lithium niobate (TFLN) waveguides. Thin-film lithium niobate is a promising platform for integrated photonics, enabling the fabrication of compact waveguide structures and topologies. The fabrication process of TFLN waveguides includes several stages: design, fabrication, and testing. This paper focuses on the testing stage, which allows for an objective evaluation of the fabrication process and the correctness of the design. The methodology for measuring propagation losses in waveguides is an important research topic in integrated photonics. Several measurement approaches are considered, including interferometric methods based on Fabry–Pérot resonances within the waveguide and the cut-back method. A comparison of these methods in terms of universality, repeatability, and accuracy shows that the cut-back method is the most promising among those considered.

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铌酸锂薄膜波导中传输损耗的测量方法

研究了铌酸锂薄膜波导中传输损耗的测量方法。薄膜铌酸锂是一个很有前途的集成光子学平台，可以制造紧凑的波导结构和拓扑结构。TFLN波导的制造过程包括设计、制造和测试几个阶段。本文的重点是测试阶段，这可以客观地评估制造过程和设计的正确性。波导中传输损耗的测量方法是集成光子学中的一个重要研究课题。本文考虑了几种测量方法，包括基于波导内法布里-帕氏谐振的干涉测量方法和切回法。这些方法在通用性、可重复性和准确性方面的比较表明，切回法是其中最有前途的方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Bulletin of the Russian Academy of Sciences: Physics Physics and Astronomy-Physics and Astronomy (all)

CiteScore

0.90

自引率

0.00%

发文量

251

期刊介绍： Bulletin of the Russian Academy of Sciences: Physics is an international peer reviewed journal published with the participation of the Russian Academy of Sciences. It presents full-text articles (regular, letters to the editor, reviews) with the most recent results in miscellaneous fields of physics and astronomy: nuclear physics, cosmic rays, condensed matter physics, plasma physics, optics and photonics, nanotechnologies, solar and astrophysics, physical applications in material sciences, life sciences, etc. Bulletin of the Russian Academy of Sciences: Physics focuses on the most relevant multidisciplinary topics in natural sciences, both fundamental and applied. Manuscripts can be submitted in Russian and English languages and are subject to peer review. Accepted articles are usually combined in thematic issues on certain topics according to the journal editorial policy. Authors featured in the journal represent renowned scientific laboratories and institutes from different countries, including large international collaborations. There are globally recognized researchers among the authors: Nobel laureates and recipients of other awards, and members of national academies of sciences and international scientific societies.