Related Experiment Video
Updated: Jan 13, 2026
09:03
A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response
Published on: January 7, 2019
7.6K
High-resolution, large dynamic range fiber-optic thermometer with cascaded Fabry-Perot cavities
Optics Letters
|November 3, 2016
Summary
This study introduces a novel fiber-optic thermometer using dual silicon Fabry-Perot interferometers (FPIs) to achieve both high resolution and a large dynamic range for accurate temperature sensing.
Area of Science:
- Optoelectronics
- Sensor Technology
- Materials Science
Background:
- Sensors face a common challenge balancing a wide dynamic range with high resolution.
- Fabry-Perot interferometers (FPIs) are optical sensors sensitive to environmental changes.
Purpose of the Study:
- To develop a fiber-optic thermometer overcoming the dynamic range-resolution trade-off.
- To demonstrate a hybrid sensor combining the strengths of thin and thick silicon FPIs.
Main Methods:
- Fabrication of a dual-FPI fiber-optic thermometer using silicon with different cavity lengths (200 μm and 10 μm).
- Utilizing the thin FPI for dynamic range and the thick FPI for high resolution.
- Employing average wavelength tracking for demodulation.
Main Results:
- The hybrid sensor achieved a temperature range of -50°C to 130°C.
- Demonstrated a high resolution of 6.8×10⁻³°C.
- Significantly improved dynamic range and resolution compared to single-FPI sensors.
Conclusions:
- The dual-FPI silicon thermometer effectively resolves the dynamic range and resolution paradox.
- This approach offers a superior solution for precise temperature measurement in demanding applications.
