Conversion of intensity measurements to Stokes Parameters is achieved by multiplying the data by an "instrument matrix", which uniquely characterizes the Polarization Analyzer. This instrument matrix is a function of the operating wavelength, because the optics will be wavelength dependent. However, the FB-PAM is designed to have low wavelength dependence. In order to determine the instrument matrix, the entire System must be calibrated. Two Calibration Modes are available with the FB-PAM: Built-in Data Tables are used for compensation when operating at wavelengths other than the design wavelength. Matrix Calibration makes no assumptions about the system components. Therefore, a more rigorous calibration procedure is used to describe system characteristics at any wavelength. Specifications The FB-PAM FiberBench Polarization Analyzer includes:
For free-space applications, the Input FiberPort is easily removed from the FiberBench. The FB-PAM can be post-mounted or table-mounted.
DetectorPorts An optional means of measuring intensities is the DetectorPort, which is mounted on a FiberBench or FiberTable. The DetectorPort contains an amplified silicon or InGaAs detector (for visible or infrared operation, respectively), whose output voltage is proportional to the average (cw) intensity of light. This voltage is measured using any voltmeter or oscilloscope.
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Optics
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