NIST logo

Publication Citation: Tests of a Two-Photon Technique for Measuring Polarization Mode Dispersion With Subfemtosecond Precision

NIST Authors in Bold

Author(s): Eric Dauler; Gregg Jaeger; A Muller; Alan L. Migdall;
Title: Tests of a Two-Photon Technique for Measuring Polarization Mode Dispersion With Subfemtosecond Precision
Published: January 01, 1999
Abstract: An investigation is made of a recently introduced quantum interferometric method capable of measuring polarization mode dispersion (PMD) on sub-femtosecond scales, without the usual interferometric stability problems associated with such small time scales. The technique makes use of the extreme temporal correlation of orthogonally polarized pairs of photons produced via type-II phase-matched spontaneous parametric down-conversion. When sent into a simple polarization interferometer these photon pairs produce a sharp interference feature seen in the coincidence rate. The PMD of a given sample is determined from the shift of that interference feature as the sample is inserted into the system. The stability and resolution of this technique is shown to be below 0.2 fs. We explore how this precision is improved by reducing the length of the down-conversion crystal and increasing the spectral band pass of the system.
Citation: Journal of Research of the National Institute of Standards and Technology
Volume: 104
Pages: pp. 1 - 10
Keywords: group velocity delay;optical delay;parametric downconversion;polarization interferometer;polarization mode dispersion;quantum interference
Research Areas: Optics, Quantum Optics, Entangled Photons, Correlated Photon Radiometry, Quantum Physics
PDF version: PDF Document Click here to retrieve PDF version of paper (149KB)