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A new Mach-Zehnder interference temperature measuring sensor based on silica-based chip.

Guoqiang Li1, Tao Li2, Yongfang Liu3

  • 1School of Electrical and Electronic Engineering, Nanyang Technological University, Nanyang Avenue, Singapore, 639798, Singapore.

Scientific Reports
|April 15, 2024
PubMed
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A novel silicon-based Mach-Zehnder interference (MZI) temperature sensor chip was developed. This "mosquito coil" design achieves high-resolution 0.002 °C temperature measurements over a 30 °C range.

Area of Science:

  • Photonics and Optical Sensing
  • Materials Science

Background:

  • Temperature sensing is crucial in various scientific and industrial applications.
  • Existing sensors face limitations in resolution, range, or material compatibility.
  • Silicon-based photonics offers a promising platform for integrated sensing solutions.

Purpose of the Study:

  • To design and demonstrate a novel silicon-based Mach-Zehnder interference (MZI) temperature sensor chip.
  • To investigate the performance of a unique "mosquito coil" MZI structure for temperature sensing.
  • To evaluate the sensor's resolution and measurement range.

Main Methods:

  • Design of a silicon-based MZI chip featuring a "mosquito coil" interference structure.
  • Utilizing a frequency-stabilized fiber Bragg grating laser for interrogation.

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  • Analyzing the relationship between surrounding temperature, waveguide refractive index, and output light intensity.

    • Main Results:

    • The developed MZI temperature sensor chip demonstrated a high resolution of 0.002 °C.
    • The sensor operated effectively within a measurement range of 30 °C.
    • The "mosquito coil" structure enabled sensitive detection of temperature-induced refractive index changes.

    Conclusions:

    • The novel silicon-based MZI temperature sensor with a "mosquito coil" structure is effective for high-resolution measurements.
    • This integrated photonic sensor offers a promising solution for precise temperature monitoring.
    • Further development could expand the application scope of this silicon photonic sensor technology.