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A Robust Distributed Multipoint Fiber Optic Gas Sensor System Based on AGC Amplifier Structure.

Cunguang Zhu1, Rende Wang2, Xuechen Tao3

  • 1School of Physics and Technology, University of Jinan, Jinan 250022, China. sps_zhucg@ujn.edu.cn.

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|August 3, 2016
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Summary
This summary is machine-generated.

This study introduces an automatic gain control (AGC) fiber optic gas sensor system for harsh environments. The system enhances signal reliability and reduces deviation by compensating for optical loss, outperforming traditional methods.

Keywords:
AGCdistributed multipoint sensorgas sensoroptical transmission loss

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Area of Science:

  • Optoelectronics
  • Sensor Technology
  • Environmental Monitoring

Background:

  • Fiber optic sensors are crucial for gas detection in various environments.
  • Signal reliability can be compromised by optical transmission losses in fiber optic systems.
  • Existing systems may require frequent recalibration due to signal drift.

Purpose of the Study:

  • To propose a distributed multipoint fiber optic gas sensor system for harsh environments.
  • To enhance the reliability of photoelectric signals using automatic gain control (AGC) technology.
  • To reduce system deviation and simplify calibration processes.

Main Methods:

  • Implementation of an automatic gain control (AGC) closed-loop feedback structure.
  • Real-time adjustment of electronic variable gain to compensate for optical transmission loss.
  • Testing system deviation under fiber bending loss conditions.

Main Results:

  • The AGC-based system demonstrated a deviation below 4.02% for a 5 mm bending radius, 20 times lower than differential systems.
  • The AGC circuit maintained consistent baseline signal intensity across different channels.
  • The system effectively compensates for optical transmission losses, including fiber bend loss.

Conclusions:

  • The proposed AGC technology significantly improves the reliability of fiber optic gas sensor systems in harsh environments.
  • The system's ability to compensate for signal loss and maintain baseline stability reduces calibration needs and installation complexity.
  • This advancement offers a more robust and user-friendly solution for distributed multipoint gas sensing.