Title :
A Complete Spectral Polarimeter Design for Lightwave Communication Systems
Author :
Wang, Shawn X. ; Weiner, Andrew M.
Author_Institution :
Sch. of Electr. & Comput. Eng., Purdue Univ., West Lafayette, IN
Abstract :
The authors describe a fast spectral polarimeter operating in the lightwave communications band capable of measuring both state-of-polarization and degree-of-polarization of hundreds (up to thousands) of spectral components in parallel within milliseconds. In this paper, the design incorporates fast switching ferroelectric liquid crystals for polarization component selection on the 100-mus scale. Dispersion elements and an arrayed detector are used for wavelength-parallel sensing. Bandwidth of coverage can be scaled from a single wavelength-division multiplexed channel to more than 100 nm, and 256 spectral polarization measurements in under 1 ms are verified. Finally, a calibration algorithm is used to minimize measurement error. This instrument offers unprecedented sensing capability relevant to the monitoring and compensation of polarization-related impairments in high-speed lightwave communications
Keywords :
calibration; ferroelectric liquid crystals; liquid crystal devices; measurement errors; optical communication equipment; optical design techniques; optical fibre communication; optical fibre polarisation; optical sensors; photodetectors; polarimeters; telecommunication channels; wavelength division multiplexing; arrayed detector; calibration algorithm; degree-of-polarization; dispersion elements; fast switching liquid crystals; ferroelectric liquid crystals; high-speed lightwave communications; lightwave communication systems; measurement error; polarization component selection; polarization state; polarization-related impairments; spectral polarimeter design; spectral polarization measurements; wavelength-division multiplexed channel; wavelength-parallel sensing; Bandwidth; Calibration; Communication switching; Detectors; Ferroelectric materials; Liquid crystals; Optical polarization; Sensor arrays; Wavelength division multiplexing; Wavelength measurement; Degree-of-polarization (DOP); polarimetry; polarization-mode dispersion (PMD);
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2006.883614
