用于中红外波段的BGO晶体s曲线双线波导飞秒激光写入

IF 3.8 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials Pub Date : 2025-06-27 DOI:10.1016/j.optmat.2025.117283

Lingqi Li , Pengda Wang , Lijuan Shi , Weijin Kong , Feng Chen

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引用次数: 0

摘要

报道了利用飞秒激光直接写入技术在立方锗酸铋（Bi4Ge3O12， BGO）晶体中制备s曲线双线光波导。本文成功制备了三种基于II型结构的s型弯曲波导，其输入和输出端口之间的横向偏移分别为50 μm、100 μm和150 μm。这些波导具有从可见光到中红外波段（MIR）的全波长特性，具有良好的导流性能。实验测量的s -弯曲波导模态分布与仿真结果在4 μm处吻合较好。所有弯曲波导的弯曲损耗都小于~ 1.6 dB/cm。我们的工作不仅验证了bgo波导稳定中红外光传输的可行性，而且建立了一种利用激光写入晶体波导构建宽带集成光子电路的有效方法。

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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Femtosecond laser writing of S-curved dual-line waveguides in BGO crystal for mid-infrared band application

We report on the fabrication of S-curved dual-line optical waveguides in cubic bismuth germanate (Bi₄Ge₃O₁₂, BGO) crystal using femtosecond laser direct writing. Three S-curved waveguides based on Type II configuration are successfully fabricated with lateral offsets of 50 μm, 100 μm, and 150 μm between their input and output ports. These waveguides are characterized at full-wavelength from visible to mid-infrared band (MIR), showing good guiding properties. The experimentally measured modal profiles of these S-curved waveguides show good agreement with simulation results at 4 μm. Bending losses for all curved waveguides are less than ∼1.6 dB/cm. Our work not only validates the feasibility of BGO-based waveguides for stable mid-infrared light transmission, but also establishes an effective approach for constructing broadband-integrated photonics circuits via laser-written crystalline waveguides.

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来源期刊

Optical Materials 工程技术-材料科学：综合

CiteScore

6.60

自引率

12.80%

发文量

1265

审稿时长

38 days

期刊介绍： Optical Materials has an open access mirror journal Optical Materials: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. The purpose of Optical Materials is to provide a means of communication and technology transfer between researchers who are interested in materials for potential device applications. The journal publishes original papers and review articles on the design, synthesis, characterisation and applications of optical materials. OPTICAL MATERIALS focuses on: • Optical Properties of Material Systems; • The Materials Aspects of Optical Phenomena; • The Materials Aspects of Devices and Applications. Authors can submit separate research elements describing their data to Data in Brief and methods to Methods X.