Optical polarimeter
Thorlabs

Two Basic Systems to Choose From:
External Sensor Head: The PAX5710 Series for free space and fiber based measurements with easy integration in optical setups plus the option to exchange the sensor for a different wavelength range.
Internal Sensor Head: The PAX5720 Series for fiber based measurements at a fixed wavelength range.
Features
High Dynamic Range
Rotating Waveplate Based
Broad Wavelength Range from 400 nm to 1700 nm with 4 Different Models
External Exchangeable Measurement Heads
Sampling Rate up to 333 S/s
Excellent Accuracy
Applications
Free Space and In-Fiber Polarimetry
DOP Measurements
ER Measurements
Component for a PDL/ PMD Measurement System
Introduction
The PAX5700 Series is a terminating rotating waveplate based polarimeter module for free space and fiber based measurements of the state of polarization (SOP). Its high dynamic range of 70 dB, broad wavelength range, and accuracy of ±0.2° on the Poincaré sphere opens a wide spectrum of application possibilities. The PAX5700 Series is available with internal or external sensor heads and is fully compatible with Thorlabs' TXP5000 platform.

Operation Mode
All four Stokes values, which fully characterize a SOP, are provided either as analog output voltages or as digital values to the PC. An external trigger function allows synchronization of the PAX5700 Polarimeter with other devices. The PAX5710 offers an external sensor head, which can be used for free-space beams as well as for fiber-coupled measurements. A removable collimation package for a fiber connector input comes with each sensor head. The PAX5720 has integrated a non removable collimation package.

Modular Design
Based on the Thorlabs TXP5000 Modular Test & Measurement System, the PAX5700 Series offer additional features like USB/ Ethernet ports, 'plug and play' combination with other modules, easy to use graphical user interfaces, and flexible configuration via LabVIEW™, Labwindows/CVI™, MSVC and Borland C drivers.

Calibration
Each measurement sensor is calibrated at different wavelength points. These base points are interpolated.