An ultra-high extinction ratio broadband photonic crystal fiber splitter designed for the terahertz band

IF 2.6 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Optical Fiber Technology Pub Date : 2025-01-23 DOI:10.1016/j.yofte.2025.104136

Chao Liu , Yuan Sun , Yanshu Zeng , Wei Liu , Jingwei Lv , Lin Yang , Jianxin Wang , Qiang Liu , Paul K. Chu

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引用次数: 0

Abstract

Terahertz (THz) polarization beam splitters (PBS) are valuable for applications in areas such as wireless high-speed communications and terahertz imaging. In this paper, a dual-core terahertz photonic crystal fiber (PCF) polarization beam splitter is proposed to achieve short length, high extinction ratio and wide bandwidth. This PBS has a cyclic olefin copolymer (COC) as the base material, and the dual-core structure is realized by introducing a central air hole. Performance analysis, conducted using the finite element method, reveals that the proposed PBS achieves a minimum length of 29.50688 mm, a bandwidth of 0.19 THz between 0.47 THz and 0.66 THz, and a maximum extinction ratio of −324.257 dB at an incident light frequency of 0.54 THz, where the two polarization modes are nearly completely separated. In addition, the PBS exhibits good manufacturing tolerances with a structural error of ± 1 %. These excellent properties indicate that THz PCF-PBS has great potential for applications in terahertz-band optical communication, optical sensing and optoelectronic detection.

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来源期刊

Optical Fiber Technology 工程技术-电信学

CiteScore

4.80

自引率

11.10%

发文量

327

审稿时长

63 days

期刊介绍： Innovations in optical fiber technology are revolutionizing world communications. Newly developed fiber amplifiers allow for direct transmission of high-speed signals over transcontinental distances without the need for electronic regeneration. Optical fibers find new applications in data processing. The impact of fiber materials, devices, and systems on communications in the coming decades will create an abundance of primary literature and the need for up-to-date reviews. Optical Fiber Technology: Materials, Devices, and Systems is a new cutting-edge journal designed to fill a need in this rapidly evolving field for speedy publication of regular length papers. Both theoretical and experimental papers on fiber materials, devices, and system performance evaluation and measurements are eligible, with emphasis on practical applications.