Quantifying the optical activity of a sample requires precise measurement rotation plane linear polarization transmitted light. Central to this notion is that needs be exposed light defined state. We show by using polarization-entangled photon source we can measure whilst illuminating with unpolarized This not only allows for low but also analysis samples would otherwise perturbed if subjected ...

we solve the coupled mode equations governing the chalcogenide nonlinear fiber bragg gratings (fbgs) numerically, and obtain the bistability characteristics. the characteristics of the chalcogenide nonlinear fbgs such as: switching threshold intensity, bistability interval, on-off switching ratio are studied. the effects of fbg length and its third order nonlinear refractive index on fbg charac...