Silicon Photonic Polarization Multiplexing Sensor with Both Large Range and High Resolution

Shaojie Yin, Xiaoyan Wang, Zhibin Wang, Sanshui Xiao, Xiaowei Guan*

*Corresponding author for this work

    Research output: Contribution to journalJournal articleResearchpeer-review

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    Abstract

    A silicon photonic polarization multiplexing (PM) sensor featuring both a large range and a high resolution is proposed and experimentally demonstrated. The sensor includes a Fabry–Pérot (FP) resonator and a microring resonator (MRR) functioning as the sensing parts. With PM technology, the FP resonator only works on the transverse-electric mode while the MRR only on the transverse-magnetic mode. Thus, the proposed sensor can simultaneously achieve a large range with a short FP resonator and a high resolution with a high-Q MRR. Measured results show a range of 113 °C and a resolution of 0.06 °C for temperature sensing, and a range of 0.58 RIU (refractive index unit) with the resolution of 0.002 RIU for analyte refractive index sensing.
    Original languageEnglish
    Article number5870
    JournalSensors
    Volume20
    Issue number20
    Number of pages8
    ISSN1424-8220
    DOIs
    Publication statusPublished - 2020

    Keywords

    • Polarization multiplexing
    • Silicon photonic sensor
    • Fabry–Pérot resonator
    • Microring resonator
    • Large range
    • High resolution

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