Related Experiment Video
Updated: Aug 19, 2026

Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
Published on: February 28, 2016
Quantum measurement of the degree of polarization of a light beam
M Legré1, M Wegmüller, N Gisin
1GAP-Optique, University of Geneva, 20, Rue de l'Ecole de Médecine, CH-1211 Geneva 4, Switzerland. Matthieu.legre@physics.unige.it
Abstract:
We demonstrate a coherent quantum measurement for the determination of the degree of polarization (DOP). This method allows us to measure the DOP in the presence of fast polarization state fluctuations, difficult to achieve with the typically used polarimetric technique. A good precision of the DOP measurements is obtained using eight type II nonlinear crystals assembled for spatial walk-off compensation.
Related Concept Videos
Measuring Reaction Rates
Potential Due to a Polarized Object

