A Review of Hybrid Fiber-Optic Distributed Simultaneous Vibration and Temperature Sensing Technology and Its...

Area of Science:

• Geophysics
• Optical Engineering
• Sensor Technology

Background:

• Distributed sensing systems convert optical fiber into sensor arrays for monitoring temperature, vibration, and strain.
• Fiber-optic distributed acoustic sensing (DAS) and distributed temperature sensing (DTS) have varying resolutions and ranges.
• Existing methods like Rayleigh, Raman, and Brillouin scattering-based OTDR have limitations in simultaneous measurements.

Purpose of the Study:

• To analyze recent developments in hybrid fiber-optic systems for simultaneous vibration, temperature, and strain measurements.
• To evaluate the operational principles and performance of these hybrid systems.
• To identify challenges and limitations for geophysical applications.

Main Methods:

• Analysis of hybrid fiber-optic sensing systems based on their operational principles.
• Performance evaluation of systems capable of simultaneous multi-parameter sensing.
• Review of technologies including Rayleigh, Raman, and Brillouin scattering-based OTDR.

Main Results:

• Hybrid systems show promise for simultaneous detection of vibration, temperature, and strain.
• Different hybrid configurations offer trade-offs in sensitivity, spatial resolution, and frequency range.
• The article analyzes various approaches to overcome limitations in current distributed sensing technologies.

Conclusions:

• Simultaneous vibration, temperature, and strain measurements are crucial for geophysical and mining engineering.
• Recent advancements in hybrid systems address the challenge of multi-parameter sensing along optical fibers.
• Further research is needed to optimize these systems for specific geophysical applications, considering sensitivity, resolution, and frequency response.