Stabilized Channeled Spectropolarimeter Using Integrated Calcite Prisms

摘要

A novel design of the channeled spectropolarimeter suited for stable operation is presented. An integrated polarization analyzing optics made of calcite is used together with a novel signal processing procedure to add the self-recalibration feature to the channeled spectropolarimeter. The recalibration of the system parameters and the measurement of the state of polarization are made simultaneously using only the light under measurement. A multi-channel spectrometer is also employed to avoid the errors associated with the wavelength-axis drift. Elimination of the thermal disturbance is demonstrated experimentally.