中国物理B ›› 2021, Vol. 30 ›› Issue (12): 124205-124205.doi: 10.1088/1674-1056/ac032e

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Single-mode antiresonant terahertz fiber based on mode coupling between core and cladding

Shuai Sun(孙帅)1,2, Wei Shi(史伟)1,2,†, Quan Sheng(盛泉)1,2, Shijie Fu(付士杰)1,2, Zhongbao Yan(闫忠宝)1,2, Shuai Zhang(张帅)1,2, Junxiang Zhang(张钧翔)1,2, Chaodu Shi(史朝督)1,2, Guizhong Zhang(张贵忠)1,2, and Jianquan Yao(姚建铨)1,2   

  1. 1 Institute of Laser and Optoelectronics, School of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China;
    2 Key Laboratory of Optoelectronic Information Science and Technology(Ministry of Education), Tianjin University, Tianjin 300072, China
  • 收稿日期:2021-04-19 修回日期:2021-05-14 接受日期:2021-05-20 出版日期:2021-11-15 发布日期:2021-11-30
  • 通讯作者: Wei Shi E-mail:shiwei@tju.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 62075159), the National Key Research and Development Program of China (Grant No. 2017YFF0104603), the 111 Project of China (Grant No. B17031), and the Major Scientific and Technological Innovation Projects of Key Research and Development Plans in Shandong Province, CHina (Grant No. 2019JZZY020206).

Single-mode antiresonant terahertz fiber based on mode coupling between core and cladding

Shuai Sun(孙帅)1,2, Wei Shi(史伟)1,2,†, Quan Sheng(盛泉)1,2, Shijie Fu(付士杰)1,2, Zhongbao Yan(闫忠宝)1,2, Shuai Zhang(张帅)1,2, Junxiang Zhang(张钧翔)1,2, Chaodu Shi(史朝督)1,2, Guizhong Zhang(张贵忠)1,2, and Jianquan Yao(姚建铨)1,2   

  1. 1 Institute of Laser and Optoelectronics, School of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China;
    2 Key Laboratory of Optoelectronic Information Science and Technology(Ministry of Education), Tianjin University, Tianjin 300072, China
  • Received:2021-04-19 Revised:2021-05-14 Accepted:2021-05-20 Online:2021-11-15 Published:2021-11-30
  • Contact: Wei Shi E-mail:shiwei@tju.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 62075159), the National Key Research and Development Program of China (Grant No. 2017YFF0104603), the 111 Project of China (Grant No. B17031), and the Major Scientific and Technological Innovation Projects of Key Research and Development Plans in Shandong Province, CHina (Grant No. 2019JZZY020206).

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摘要： Based on the index-induced mode coupling between the higher-order mode in core and the fundamental mode in cladding tubes, the single-mode operation can be realized in any antiresonant fibers (ARFs) when satisfying that the area ratio of cladding tube and core is about 0.46:1, and this area ratio also should be modified according to the shape and the number of cladding tubes. In the ARF with nodal core boundary, the mode in core also can couple with the mode in the wall of core boundary, which can further enhance the suppression of high-order mode. Accordingly, an ARF with conjoint semi-elliptical cladding tubes realizes a loss of higher-order mode larger than 30 dB/m; simultaneously, a loss of fundamental mode loss less than 0.4 dB/m.

关键词: terahertz, mode coupling, single-mode fiber

Abstract: Based on the index-induced mode coupling between the higher-order mode in core and the fundamental mode in cladding tubes, the single-mode operation can be realized in any antiresonant fibers (ARFs) when satisfying that the area ratio of cladding tube and core is about 0.46:1, and this area ratio also should be modified according to the shape and the number of cladding tubes. In the ARF with nodal core boundary, the mode in core also can couple with the mode in the wall of core boundary, which can further enhance the suppression of high-order mode. Accordingly, an ARF with conjoint semi-elliptical cladding tubes realizes a loss of higher-order mode larger than 30 dB/m; simultaneously, a loss of fundamental mode loss less than 0.4 dB/m.

Key words: terahertz, mode coupling, single-mode fiber

中图分类号:  (Fiber waveguides, couplers, and arrays)

  • 42.81.Qb
42.81.-i (Fiber optics) 95.85.Gn (Far infrared (10-300 μm))