Journal of Optoelectronics · Laser, Volume. 35, Issue 3, 258(2024)

Research on the refractive index sensing mechanism based on multimodal double-biased optical fiber

JIANG Xiquan1, LIU Haodong2, NIU Hao1, SUN Xiao1, LV Xiao1, and ZHAO Yanjie1、*
Author Affiliations
  • 1[in Chinese]
  • 2[in Chinese]
  • show less

    An ultra-high sensitivity refractive index sensor based on double biased fiber Mach-Zehnder interferometer (MZI) is proposed.The interference mechanism of biased MZI is analyzed theoretically.The refractive index sensing characteristics of the multimodal biased fiber,the variation of refractive index sensitivity in different biased lengths and refractive index ranges are simulated and analyzed by beam propagation method (BPM),and the sensing characteristics of single-biased and double-biased are compared.The simulation results show that the refractive index sensitivity of single-biased MZI is -5 557 nm/RIU when the refractive index range is 1.333 0—1.334 0,and the refractive index sensitivity of double-biased MZI is -14 071 nm/RIU,which provides a import theoretical basis for high sensitivity measurement of liquid refractive index.The sensor has a compact structure and the overall length is only 1 200 μm,which has important application value in the field of liquid refractive index measurement.

    Tools

    Get Citation

    Copy Citation Text

    JIANG Xiquan, LIU Haodong, NIU Hao, SUN Xiao, LV Xiao, ZHAO Yanjie. Research on the refractive index sensing mechanism based on multimodal double-biased optical fiber[J]. Journal of Optoelectronics · Laser, 2024, 35(3): 258

    Download Citation

    EndNote(RIS)BibTexPlain Text
    Save article for my favorites
    Paper Information

    Received: Oct. 11, 2022

    Accepted: --

    Published Online: Sep. 24, 2024

    The Author Email: ZHAO Yanjie (zhaoyanjie@sdjzu.edu.cn)

    DOI:10.16136/j.joel.2024.03.0691

    Topics