Related Experiment Video
Updated: Jun 20, 2026

Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
Published on: February 28, 2016
Measurement of polarization-mode dispersion in single-mode fibers with random mode coupling
Abstract:
A simple frequency-domain technique for measuring polarization-mode dispersion in single-mode fibers with random mode coupling is used to give what is to my knowledge the first direct experimental demonstration of the transition of the dispersion from a linear length dependence to a square-root-of-length dependence. Sensitivity to external perturbations is demonstrated by an order-of-magnitude increase in dispersion when the fiber is removed from a conventional spool and placed on a large-diameter drum. An expression for the length-dependent probability density function that describes the dispersion for highly coherent sources is also presented and confirmed experimentally.
Related Concept Videos
Polymers: Molecular Weight Distribution
Spin–Spin Coupling Constant: Overview
Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must have a...
Measuring Reaction Rates
Potential Due to a Polarized Object

