Properties of a Variable-delay Polarization Modulator
arXiv:1106.5984 · doi:10.1364/AO.51.000197
Abstract
We investigate the polarization modulation properties of a variable-delay polarization modulator (VPM). The VPM modulates polarization via a variable separation between a polarizing grid and a parallel mirror. We find that in the limit where the wavelength is much larger than the diameter of the metal wires that comprise the grid, the phase delay derived from the geometric separation between the mirror and the grid is sufficient to characterize the device. However, outside of this range, additional parameters describing the polarizing grid geometry must be included to fully characterize the modulator response. In this paper, we report test results of a VPM at wavelengths of 350 microns and 3 mm. Electromagnetic simulations of wire grid polarizers were performed and are summarized using a simple circuit model that incorporates the loss and polarization properties of the device.
25 pages, 10 figures, accepted by Applied Optics
References in corpus (2)
Cited by in corpus (27)
- CLASS: The Cosmology Large Angular Scale Surveyor
- POLOCALC: a Novel Method to Measure the Absolute Polarization Orientation of the Cosmic Microwave Background
- A Projected Estimate of the Reionization Optical Depth Using the CLASS Experiment's Sample-Variance Limited E-Mode Measurement
- Development of large radii half-wave plates for CMB satellite missions
- A cryogenic rotation stage with a large clear aperture for the half-wave plates in the Spider instrument
- Two-year Cosmology Large Angular Scale Surveyor (CLASS) Observations: 40 GHz Telescope Pointing, Beam Profile, Window Function, and Polarization Performance
- On-sky performance of the CLASS Q-band telescope
- Two-year Cosmology Large Angular Scale Surveyor (CLASS) Observations: A Measurement of Circular Polarization at 40 GHz
- Recovery of Large Angular Scale CMB Polarization for Instruments Employing Variable-delay Polarization Modulators
- A Translational Polarization Rotator
- Two Year Cosmology Large Angular Scale Surveyor (CLASS) Observations: Long Timescale Stability Achieved with a Front-End Variable-delay Polarization Modulator at 40 GHz
- Measuring the Largest Angular Scale CMB B-mode Polarization with Galactic Foregrounds on a Cut Sky
- The Cosmology Large Angular Scale Surveyor Receiver Design
- Two-year Cosmology Large Angular Scale Surveyor (CLASS) Observations: A First Detection of Atmospheric Circular Polarization at Q Band
- Scientific verification of Faraday Rotation Modulators: Detection of diffuse polarized Galactic emission
- Calibration of Transition-edge Sensor (TES) Bolometer Arrays with Application to CLASS
- Submillimeter Polarimetry with PolKa, a reflection-type modulator for the APEX telescope
- Analysis and calibration techniques for superconducting resonators
- Variable-delay Polarization Modulators for Cryogenic Millimeter-wave Applications
- Vector Reflectometry in a Beam Waveguide
- Systematic effects in polarizing Fourier transform spectrometers for cosmic microwave background observations
- Cosmology Large Angular Scale Surveyor (CLASS): 90 GHz Telescope Pointing, Beam Profile, Window Function, and Polarization Performance
- Superfluid Liquid Helium Control for the Primordial Inflation Polarization Explorer Balloon Payload
- Angular and Polarization Response of Multimode Sensors with Resistive-Grid Absorbers
- Scalable background-limited polarization-sensitive detectors for mm-wave applications
- Development and application of metamaterial-based Half-Wave Plates for the NIKA and NIKA2 polarimeters
- NEW-MUSIC: The Next-generation Extended-Wavelength Multiband Sub/millimeter Inductance Camera