Limits of applicability of polarization sensitive reflectometry

Area of Science:

• Optical physics
• Materials science

Background:

• Polarization sensitive reflectometry (PSR) is a technique used to analyze the polarization properties of materials.
• Measuring spin profiles in single-mode fibers is crucial for understanding their behavior in various applications.

Purpose of the Study:

• To theoretically analyze the measurement limits of PSR imposed by spatial resolution and measurement accuracy.
• To develop and experimentally verify a method for measuring spin profiles in single-mode fibers with spin rates exceeding the instrument's range.

Main Methods:

• Detailed theoretical analysis of measurement constraints in PSR.
• Development of a novel technique involving local fiber twisting to effectively reduce spin rate.
• Experimental verification of the proposed technique on single-mode fibers.

Main Results:

• A map of constraints was developed to represent the measurement limits of PSR.
• The proposed technique successfully measured spin profiles with rates exceeding the reflectometer's standard range.
• Experimental results validated the theoretical predictions and the effectiveness of the unwinding technique.

Conclusions:

• The study defines the fundamental limits of PSR for spin profile measurements.
• The novel fiber twisting technique offers a practical solution for extending the measurable range of spin rates.
• This work enhances the capability of characterizing optical fibers with high polarization sensitivity.