Characterization of few mode fiber components and connected systems

Area of Science:

• Optical fiber communications
• Photonics engineering
• Metrology

Background:

• Accurate characterization of polarization-dependent loss (PDL) and crosstalk is crucial for high-performance few-mode fiber (FMF) systems.
• Existing methods for component-level crosstalk measurement can be complex and time-consuming.
• System-level measurements often do not directly translate to individual component performance.

Purpose of the Study:

• To present novel methods for measuring PDL and crosstalk in individual FMF components and connected systems.
• To introduce and validate a new technique for determining component crosstalk from connected system measurements.
• To enhance the diagnostic capabilities for FMF-based optical communication systems.

Main Methods:

• Development of measurement techniques for PDL and crosstalk in FMF components and systems.
• Introduction of a new method based on Fourier analysis of wavelength-dependent interference.
• Verification of the new method through both numerical simulations and experimental measurements.

Main Results:

• Demonstrated accurate measurement of PDL and crosstalk for individual FMF components.
• Successfully determined component crosstalk from connected system measurements using the novel Fourier analysis method.
• Validated the proposed method's effectiveness and reliability through simulations and experimental data.

Conclusions:

• The presented Fourier analysis method provides an effective way to determine individual component crosstalk from system-level measurements.
• This new technique simplifies the characterization of FMF components, aiding in the design and deployment of advanced optical networks.
• The findings contribute to improved quality control and performance optimization in few-mode fiber technologies.