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Updated: May 7, 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

Cryogenic temperature 3D mapping via a distributed temperature sensor with centimeter resolution.

Luca Corradin, Gabriel Thiebaut, Gaëtan Gras

|November 14, 2024

Summary

This summary is machine-generated.

This study demonstrates 3D cryogenic temperature mapping using Raman-based distributed temperature sensing with superconducting nanowire single-photon detectors (SNSPDs). The system achieves a low sensing limit of 48 K, crucial for advanced instrumentation.

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Area of Science:

Physics
Materials Science
Instrumentation

Background:

Accurate temperature monitoring is critical for cryogenic applications.
Existing methods may lack the spatial resolution or sensitivity required for complex cryogenic environments.

Purpose of the Study:

To develop and demonstrate a 3D distributed temperature sensing system for cryogenic environments.
To achieve precise temperature mapping with high spatial resolution.

Main Methods:

Utilized a Raman-based distributed temperature sensor with standard single-mode optical fibers.
Employed polarization-independent superconducting nanowire single-photon detectors (SNSPDs).
Coiled the fiber around a liquid helium cryostat for calibration and testing.

Main Results:

Achieved a lower temperature sensing limit of (48 ± 2) K, below the boiling point of nitrogen.
Successfully mapped cryogenic temperatures on a 350 cm² aluminum sample with centimetric spatial resolution.
Monitored temporal temperature gradient evolution during nitrogen cooling with one-minute sampling.

Conclusions:

The developed fiber-based distributed temperature sensing system is effective for 3D cryogenic temperature mapping.
This technology has potential applications in superconducting, quantum computing, and aerospace instrumentation.
The low dark count rates of SNSPDs are key to achieving the low temperature sensing limit.