Related Experiment Video
Updated: Jul 19, 2026
09:38
Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies
Published on: December 18, 2015
CO2 laser-grooved long period fiber grating temperature sensor system based on intensity modulation.
Yi-Ping Wang1, Dong Ning Wang, Wei Jin
1Department of Electrical Engineering, Hong Kong Polytechnic University, Hong Kong, China. ypwang@china.com
Applied Optics
|October 28, 2006
Summary
A novel long period fiber grating (LPFG) temperature sensor offers high-resolution measurements. This cost-effective system uses simple intensity modulation for accurate temperature sensing.
Area of Science:
- Optics and Photonics
- Fiber Optic Sensors
- Material Science
Background:
- Fiber Bragg gratings (FBGs) are widely used for sensing applications.
- Long Period Fiber Gratings (LPFGs) offer unique transmission characteristics.
- Developing robust and cost-effective temperature sensors is crucial for various industries.
Purpose of the Study:
- To develop and characterize a novel temperature sensor system utilizing LPFGs.
- To investigate the feasibility of intensity modulation for LPFG-based temperature sensing.
- To evaluate the performance metrics of the developed LPFG temperature sensor.
Main Methods:
- Fabrication of LPFGs using a focused CO2 laser beam to create periodic grooves.
- Implementation of an intensity modulation-based measurement system.
- Calibration and testing of the sensor within a temperature range of 20-100°C.
Main Results:
- Achieved a high temperature measurement resolution of up to 0.1°C.
- Demonstrated a simple and convenient intensity measurement method.
- Observed double temperature sensitivity characteristics.
Conclusions:
- The developed LPFG temperature sensor system is effective and accurate.
- The system offers advantages such as high resolution, simple configuration, and low cost.
- LPFG-based intensity modulation presents a promising approach for temperature sensing applications.
