Long-range and high-resolution correlation optical time-domain reflectometry using a monolithic integrated broadband...

Area of Science:

• Optoelectronics
• Photonics
• Signal Processing

Background:

• Optical time-domain reflectometry (OTDR) is crucial for fiber optic network characterization.
• Traditional OTDR systems face limitations in resolution and range, especially for complex event detection.
• Integrated photonics offers potential for miniaturized and high-performance optical sensing.

Purpose of the Study:

• To demonstrate a novel chaotic correlation OTDR system.
• To achieve long-range detection with high-resolution capabilities.
• To leverage monolithic integrated chaotic lasers for enhanced OTDR performance.

Main Methods:

• Utilizing a monolithic integrated chaotic laser (MICL) to generate broadband chaotic optical signals (>40 GHz RF bandwidth).
• Implementing a chaotic correlation technique for signal processing and event localization.
• Experimentally validating the system's performance in a long-range sensing scenario.

Main Results:

• Achieved precise localization of multi-reflection events.
• Demonstrated a detection range of approximately 47 km.
• Obtained a range-independent resolution of 2.6 mm.

Conclusions:

• The developed chaotic correlation OTDR based on MICL is a compact and effective solution for long-range, high-resolution fiber sensing.
• This technology enables accurate characterization of complex fiber optic infrastructures.
• The findings pave the way for advanced optical sensing applications requiring high precision and extended reach.