Optical polarization

About: Optical polarization is a research topic. Over the lifetime, 13992 publications have been published within this topic receiving 244284 citations.

Analysis on dispersion compensation with DCF based on Optisystem

Abstract: Fiber-optic dispersion and its effect on optical transmission system are analyzed The most commonly used dispersion compensation fiber (DCF) technology is studied in this article Three schemes (pre-compensation, post-compensation, mix-compensation of dispersion compensation) of dispersion compensation with DCF are proposed The simulation model of the WDM based on the Optisystem is presented according to the above principle The simulation results such as Q factor and BER are given and deeply analyzed It is found that mix- compensation performance is the best And the input fiber power is taken as 9–10dB, the corresponding BER performance is better

Depolarization and cross polarization in ellipsometry of rough surfaces.

Abstract: In ellipsometry of rough surfaces, the commonly used parameters, psi and delta, are insufficient to characterize completely the changes in polarization state which occur when light is reflected from a rough surface. When an experimentally determined Mueller matrix is available, parameters indicative of depolarization, cross polarization, and change in ellipticity can be found. When the Mueller matrix is regarded as an operator mapping input polarization states depicted on a Poincare sphere to output states in a similar coordinate system, these new parameters can be illustrated in terms of their effects on the Poincare sphere. The depolarization and cross polarization parameters correlate with specimen roughness and reflectance.

Local Oscillator Phase Noise Induced Penalties in Optical Coherent Detection Systems Using Electronic Chromatic Dispersion Compensation

Abstract: We show that chromatic dispersion induced local oscillator (LO) phase noise to amplitude noise conversion significantly degrades the performance of a high-speed coherent system without optical dispersion compensation and tightens the requirement on LO linewidth.

A comparison of the properties of highly polarized QSOs versus low-polarization QSOs.

Abstract: An optical linear-polarization survey testing the relationships between polarization and other properties of QSOs is presented. Polarimetric observations of 239 QSOs have been made. Data from the literature are used to analyze the relationships between polarization and radio, optical, and X-ray properties. The highly polarized QSOs are generally compact radio sources, are associated with radio properties such as low-frequency variability and superluminal motion, exhibit large-amplitude rapid photometric variability, have steep nonthermal optical continua, and may show excess X-ray emission. No relationship is seen between polarization and redshift, optical luminosity, or the equivalent width of emission lines. The results are discussed in the context of both isotropic and anisotropic (beaming) models. While the associations between the optical and radio properties of highly polarized QSOs provide strong motivation for the anisotropic model, the lack of associations with redshift, optical luminosity, and emission-line strength is inconsistent with this model. It is concluded that the highly polarized QSOs are probably fundamentally different in their physical properties from low-polarization QSOs.