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Characterization of FBG sensor interrogation based on a FDML wavelength swept laser
Eun Joo Jung1, Chang-Seok Kim, Myung Yung Jeong
1Department of Nanosystem Engineering, Pusan National University, Busan, Korea.
Optics Express
|October 15, 2008
Summary
We developed an ultra-fast fiber Bragg grating sensor system using a Fourier domain mode-locked (FDML) swept laser. This advanced system offers high-speed interrogation for precise static and dynamic strain measurements.
Area of Science:
- Photonics and Optical Sensing
- Fiber Optic Sensors
- Laser Technology
Background:
- Fiber Bragg grating (FBG) sensors are widely used for strain measurement.
- Conventional swept laser sources have limitations in speed and stability.
- There is a need for high-performance interrogation systems for FBG sensors.
Purpose of the Study:
- To develop an ultra-fast FBG sensor system.
- To leverage the advantages of Fourier domain mode-locked (FDML) swept lasers.
- To characterize the performance of the developed system for strain sensing.
Main Methods:
- Utilizing a Fourier domain mode-locked (FDML) swept laser source.
- Developing an FBG sensor interrogation system.
- Characterizing static and dynamic strain responses.
Main Results:
- The FDML swept laser achieved a high scan rate of 31.3 kHz and a broad scan range of over 70 nm.
- The developed system demonstrated superior performance in high-speed interrogation.
- The system showed effective characterization of both static and dynamic strain.
Conclusions:
- The developed ultra-fast FBG sensor system based on an FDML swept laser is highly effective.
- The system offers significant advantages in speed, sensitivity, and stability for strain monitoring.
- This technology enables advanced applications in structural health monitoring and other fields.
