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Temperature influence on optical fiber and temperature compensation method for a frequency modulation continuous wave
Applied Optics
|September 14, 2023
Summary
This study introduces a temperature compensation method to enhance the precision of frequency-modulated continuous wave distance measurement systems. The new technique significantly reduces measurement errors and improves accuracy over a 1.6 m range.
Area of Science:
- Metrology and Measurement Science
- Optical Engineering
- Signal Processing
Background:
- Frequency-modulated continuous wave (FMCW) distance measurement systems suffer from decreased ranging precision due to temperature variations.
- Temperature fluctuations impact the performance of optical fiber auxiliary interferometers, a critical component in high-precision distance measurement.
Purpose of the Study:
- To develop and validate a temperature compensation method for FMCW distance measurement systems.
- To address the challenge of reduced ranging precision caused by environmental temperature changes.
- To improve the accuracy and reliability of optical distance measurement.
Main Methods:
- Implementation of a temperature compensation strategy to mitigate ranging errors.
- Utilization of the set of phases spread frequency sampling method for non-linearity correction of the beat frequency signal.
- Investigation of the influence model of temperature on the optical fiber auxiliary interferometer.
Main Results:
- Distance measurement error was reduced from 0.3432 mm to 0.02260 mm.
- Mean measurement standard deviation decreased from 0.1088 mm to 0.01733 mm.
- The compensation method demonstrated effectiveness over a maximum measurement range of 1.6 m.
Conclusions:
- The proposed temperature compensation method effectively solves the ranging precision decrease problem in FMCW distance measurement systems.
- The integration of phase spread frequency sampling and temperature influence modeling significantly enhances measurement accuracy.
- This advancement offers improved performance for optical distance measurement applications sensitive to thermal variations.
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