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Updated: Mar 11, 2026

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

Published on: November 7, 2016

High spatial resolution distributed fiber system for multi-parameter sensing based on modulated pulses.

Jingdong Zhang, Tao Zhu, Huan Zhou

|December 2, 2016

Summary

This study presents a cost-effective fiber sensing system for simultaneous vibration, temperature, and strain detection. The integrated phase-sensitive and Brillouin optical time domain reflectometry achieves high-resolution multi-parameter monitoring.

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Last Updated: Mar 11, 2026

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

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Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

Published on: March 20, 2017

Area of Science:

Fiber Optic Sensing
Distributed Sensing Systems
Optical Metrology

Background:

Traditional distributed sensing systems often require multiple detectors or channels for multi-parameter measurements.
Simultaneous and high-resolution detection of vibration, temperature, and strain in a single fiber remains a challenge.
Cost-effectiveness and system integration are key considerations for practical distributed sensing applications.

Purpose of the Study:

To develop a cost-effective distributed fiber sensing system for simultaneous multi-parameter detection.
To integrate phase-sensitive optical time domain reflectometry (φ-OTDR) and Brillouin optical time domain reflectometry (B-OTDR) for enhanced sensing capabilities.
To achieve high spatial resolution for vibration, temperature, and strain measurements using a single sensing fiber.

Main Methods:

Integration of φ-OTDR and B-OTDR techniques into a single system.
Modulation of laser pulse width and intensity for proportional parameter encoding.
Utilizing a single photo-detector and data acquisition channel for simultaneous data capture.
Application of Gaussian window short time Fourier transform (G-STFT) for high spatial resolution in B-OTDR.

Main Results:

Demonstrated simultaneous extraction of vibration, temperature, and strain data.
Achieved vibration sensing up to 4.8kHz with 3m spatial resolution over 10km of standard single-mode fiber.
Obtained distributed temperature and stress profiles with 80cm spatial resolution along the same fiber.

Conclusions:

The proposed integrated fiber sensing system offers a cost-effective solution for multi-parameter distributed sensing.
The system enables simultaneous, high-resolution monitoring of dynamic (vibration) and static (temperature, strain) parameters.
The G-STFT method enhances spatial resolution, making the system suitable for various demanding applications.