Novel PMD measurement method based on OFDR using a frequency-shifted feedback fiber laser

Area of Science:

• Optoelectronics and Photonics
• Optical Fiber Communications
• Metrology

Background:

• Polarization mode dispersion (PMD) is a critical parameter affecting optical signal quality in high-speed fiber optic systems.
• Traditional PMD measurement methods often require access to both ends of the fiber, limiting practical applications.
• Accurate and efficient PMD characterization is essential for maintaining the integrity of optical communication networks.

Purpose of the Study:

• To introduce a novel, single-ended method for measuring polarization mode dispersion (PMD) in optical fibers.
• To leverage optical frequency domain reflectometry (OFDR) for direct PMD determination.
• To demonstrate an automated system for practical PMD analysis.

Main Methods:

• Utilizing optical frequency domain reflectometry (OFDR) to analyze light interference.
• Employing Fresnel reflection at the device's end for signal generation.
• Measuring the beat frequency resulting from light interference to quantify PMD.

Main Results:

• Successful demonstration of a single-ended PMD measurement technique.
• Direct determination of PMD from the generated beat frequency.
• Development and testing of an automated PMD measurement system on polarization maintaining fibers.

Conclusions:

• The proposed OFDR-based method enables efficient, single-ended PMD measurement in optical fibers.
• The automated system provides a practical solution for characterizing polarization maintaining fibers.
• This technique offers a valuable advancement for optical fiber metrology and telecommunications.