Polarimetry Using Liquid Crystal Variable Retarders
Summary The paper introduces a novel approach to high-precision Stokes
Polarimeter
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Key Features
- Compact
- No moving parts
- Broad wavelength range
- Versatile Configuration
- User-Friendly Operation
- High Sensitivity
Polarimeter
The controller of the Polarimeter PMI-2000 is integrated into the optical head. Temperature control and Stokes vector calculation are autonomously completed server-side in the Controller. This reduces the data volume of USB calls from PC to Controller.
See Details
The Stokes parameters comprise a four-component vector that completely characterizes the polarization of a light beam. The components of the Stokes vector are simple combinations of the intensity outputs from linear polarizers or circular polarizers.
The PolarVIEW software is a user-friendly interface which displays polarization data and allows the user to perform various operations:
- Display four Stokes parameters
- Readout temperature
- Display light levels
- Save function for continuous measurement mode
PMI-2000 SPECIFICATIONS | |
Wavelength Range | 450 – 1100 nm, 900 – 1700 nm |
Absolute Degree of Polarization Accuracy | ≤ 1% |
Measurable State of Polarization | Entire Poincaré Sphere |
Measurement Frequency | 10 Hz |
Azimuth Accuracy | ± 0.54° |
Ellipticity Accuracy | ± 0.008° |
Warm-up Time for Rated Accuracy | 15 minutes for 20˚C room temperature |
Minimum Optical Power to maintain accuracy* | 10 µW |
Resolution of Stokes vector components | 0.001 |
Re-calibration Process | 3 minutes, performed as needed with Eigenstate Calibration Set |
Input Aperture | 2 mm diameter, knife edge |
Input Fiber Connector | Optional, 11 mm diameter |
Fiber Coupling Adaptor | Optional |
Maximum Operating Temperature | 35 ˚C |
Input Power Supply | 12 V, 2A |
Power Supply Ratings | Includes 5 plugs for different regions |
Optical Head Dimensions | 55.88 mm (W) x 76.20 mm (H) x 69.34 mm (L) |
Command and Control Interface | USB 2.0 Micro A |
Ordering Information – Contact Us for a Quote
These specifications describe performance at 23 ± 3 °C ambient temperature.
*Sensitivity can be increased to 1 µW by special request.
Eigenstate Calibration Set is available separately. Ordering information is below.
PMI-2000 ORDERING INFORMATION | ||
Wavelength Range | Version | Part Number |
450 – 1100 (nm) | Visible | PMI – VIS |
900 – 1700 (nm) | Near Infrared | PMI – NIR |
BROADBAND EIGENSTATE CALIBRATION SET SPECIFICATIONS | |
Wavelength Range – VIS/NIR | 450 – 1100 nm |
Wavelength Range – IR | 900 – 1700 nm |
Retardance Accuracy | λ/50 |
Thickness | 1.10 ± 0.02 in (27.94 ± 0.51 mm) |
Clear Aperture | Retarder: 0.400 in ( 10.0 mm) Polarizer: 0.315 in (8.0 mm) |
ORDERING INFORMATION FOR CALIBRATION SETS (POLARIZER AND RETARDER) | |
Item | Part Number |
Broadband Eigenstate Calibration Set – VIS/NIR | ECS – 450 – 1100 |
Broadband Eigenstate Calibration Set – IR | ECS – 900 – 1700 |
ORDERING INFORMATION FOR CALIBRATION RETARDERS OR POLARIZERS (INDIVIDUAL COMPONENTS) | |
Broadband Eigenstate Polarizer | EGP – 450 – 1700 |
Achromatic Eigenstate Retarder – VIS/NIR | EGR – 450 – 1100 |
Achromatic Eigenstate Retarder – IR | EGR – 900 – 1700 |
Graphs & Figures
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