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Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

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High-resolution and high-sensitivity optical-time-domain reflectometer.

C G Bethea, B F Levine, S Cova

|September 11, 2009

Summary

This summary is machine-generated.

A new photon-counting optical-time-domain reflectometer (OTDR) achieves high sensitivity and resolution at room temperature. This technology enables precise measurement of fiber optic splice and scattering losses with centimeter-level accuracy.

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Area of Science:

Photonics
Optical Engineering
Fiber Optics

Background:

Optical-time-domain reflectometry (OTDR) is crucial for fiber optic network characterization.
Existing OTDR systems face limitations in sensitivity and resolution for detecting subtle losses.

Purpose of the Study:

To demonstrate a novel photon-counting OTDR system operating at room temperature.
To achieve unprecedented sensitivity and resolution for loss measurements in optical fibers.

Main Methods:

Development of a photon-counting OTDR system operating at a 0.85 micrometer wavelength.
Utilizing high-sensitivity detectors for signal acquisition.
Achieving high temporal and spatial resolution for signal analysis.

Main Results:

Demonstrated a sensitivity of 3 x 10(-15) W.
Achieved a spatial resolution of 1.5 cm and temporal resolution of 150 picoseconds.
Successfully measured splice and Rayleigh scattering losses below 0.1 dB with centimeter resolution.

Conclusions:

Photon-counting OTDR offers a significant advancement in fiber optic sensing capabilities.
The demonstrated system enables highly accurate characterization of optical fiber losses.
This technology has potential applications in telecommunications and sensing.