High-Performance Photoelastic Modulator for Polarization Modulation Spectrometer

Polarization modulation infrared ellipsometric spectra were collected on an FT-IR spectrometer, with the use of two linear polarizers and a photoelastic modulator. Samples consisted of thin poly(vinyl acetate) and poly(methyl methacrylate) films on gold substrates. The relative phase retardation (delta) and relative amplitude (psi) were derived from these measurements. These spectra were superior to those from static infrared ellipsometry measurements on the same samples. The thickness and optical constants of the films were calculated from the ellipsometric measurements and compared with reference optical constant spectra.

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Photoelastic modulator: polarization modulation and phase modulation

Journal of Optics ◽

10.1088/0150-536x/26/4/002 ◽

1995 ◽

Vol 26 (4) ◽

pp. 151-159 ◽

Cited By ~ 8

Author(s):

D Yang ◽

J C Canit ◽

E Gaignebet

Keyword(s):

Phase Modulation ◽

Polarization Modulation ◽

Photoelastic Modulator

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A HAWAII-2RG Infrared Camera Operated Under Fast Readout Mode for Solar Polarimetry

10.21203/rs.3.rs-40614/v1 ◽

2020 ◽

Author(s):

Yoichiro Hanaoka ◽

Yukio Katsukawa ◽

Satoshi Morita ◽

Yukiko Kamata ◽

Noriyoshi Ishizuka

Keyword(s):

Space Weather ◽

High Speed ◽

High Performance ◽

Near Infrared ◽

Infrared Camera ◽

Polarization Modulation ◽

The Sun ◽

Interface Card ◽

Infrared Wavelengths ◽

Solar Polarimetry

Abstract Polarimetry is a crucial method to investigate solar magnetic elds. From the viewpoint of space weather, the magnetic eld in solar laments, which occasionally erupt and develop into interplanetary ux ropes, is of particular interest. To measure the magnetic eld in laments, high-performance polarimetry in the near-infrared wavelengths employing a high-speed, large-format detector is required; however, so far, this has been difficult to be realized. Thus, the development of a new infrared camera for advanced solar polarimetry has been started, employing a HAWAII-2RG (H2RG) array by Teledyne, which has 2048 2048 pixels, focusing on the wavelengths in the range of 1.0{1.6 m. We solved the problem of the difficult operation of the H2RGs under \fast readout mode" synchronizing with high-speed polarization modulation by introducing a \MACIE" (Markury ASIC Control and Interface Electronics) interface card and new assembly codes provided by Markury Scientic. This enables polarization measurements with high frame-rates, such as 29{117 frames per seconds, using a H2RG. We conducted experimental observations of the Sun and conrmed the high polarimetric performance of the camera.

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High-Performance Coherent Population Trapping Clock with Polarization Modulation

Physical Review Applied ◽

10.1103/physrevapplied.7.014018 ◽

2017 ◽

Vol 7 (1) ◽

Cited By ~ 48

Author(s):

Peter Yun ◽

François Tricot ◽

Claudio Eligio Calosso ◽

Salvatore Micalizio ◽

Bruno François ◽

...

Keyword(s):

High Performance ◽

Coherent Population Trapping ◽

Polarization Modulation ◽

Population Trapping

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Polarization-Modulation Emission FT-IR Measurement of Thin Organic Films on Metal Surfaces

Applied Spectroscopy ◽

10.1366/0003702924444470 ◽

1992 ◽

Vol 46 (1) ◽

pp. 156-158 ◽

Cited By ~ 8

Author(s):

Kenji Tochigi ◽

Hideto Momose ◽

Yutaka Misawa ◽

Takaya Suzuki

Keyword(s):

Metal Surfaces ◽

Background Radiation ◽

Infrared Emission ◽

Organic Films ◽

Polarization Modulation ◽

Ir Spectrometry ◽

Photoelastic Modulator ◽

Thin Organic Films ◽

Ft Ir ◽

Large Background

A polarization-modulation technique has been combined with Fourier transform infrared (FT-IR) spectrometry to eliminate the large background radiation which interferes with the infrared emission from thin organic films on metal surfaces. A step scan and a continuous scan interferometer which were combined with a photoelastic modulator were also studied, and the step scan system was found to be stabler and have a better S/N. The spectrum of a 12-nm perfluoropolyether film was obtained at 120°C by this system.

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A HAWAII-2RG infrared camera operated under fast readout mode for solar polarimetry

10.21203/rs.3.rs-40614/v2 ◽

2020 ◽

Author(s):

Yoichiro Hanaoka ◽

Yukio Katsukawa ◽

Satoshi Morita ◽

Yukiko Kamata ◽

Noriyoshi Ishizuka

Keyword(s):

Magnetic Field ◽

High Speed ◽

High Performance ◽

Near Infrared ◽

Infrared Camera ◽

Polarization Modulation ◽

Solar Magnetic Fields ◽

Infrared Wavelengths ◽

Solar Polarimetry ◽

The Magnetic Field

Abstract Polarimetry is a crucial method to investigate solar magnetic fields. From the viewpoint of space weather, the magnetic field in solar laments, which occasionally erupt and develop into interplanetary flux ropes, is of particular interest. To measure the magnetic field in laments, high-performance polarimetry in the near-infrared wavelengths employing a high-speed, large-format detector is required; however, so far, this has been difficult to be realized. Thus, the development of a new infrared camera for advanced solar polarimetry has been started, employing a HAWAII-2RG (H2RG) array by Teledyne, which has 2048 x 2048 pixels, focusing on the wavelengths in the range of 1.0{1.6 um. We solved the problem of the difficult operation of the H2RGs under "fast readout mode" synchronizing with high-speed polarization modulation by introducing a "MACIE" (Markury ASIC Control and Interface Electronics) interface card and new assembly codes provided by Markury Scientific This enables polarization measurements with high frame-rates, such as 29{117 frames per seconds, using a H2RG. We conducted experimental observations of the Sun and confirmed the high polarimetric performance of the camera.

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An Optical Rotatory Detector for High-Performance Liquid Chromatography Using Polarization Modulation

Analytical Sciences ◽

10.2116/analsci.24.361 ◽

2008 ◽

Vol 24 (3) ◽

pp. 361-364 ◽

Cited By ~ 3

Author(s):

Atsushi YAMAMOTO ◽

Mio KAWAI ◽

Mitsunori SAKAMOTO ◽

Shuji KODAMA ◽

Kazuichi HAYAKAWA

Keyword(s):

High Performance Liquid Chromatography ◽

Liquid Chromatography ◽

High Performance ◽

Polarization Modulation ◽

Optical Rotatory

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Polarization Demodulation: A New Approach to the Reduction of Polarization Artifacts from Vibrational Circular Dichroism Spectra

Applied Spectroscopy ◽

10.1366/0003702824639484 ◽

1982 ◽

Vol 36 (5) ◽

pp. 496-498 ◽

Cited By ~ 11

Author(s):

Elmer D. Lipp ◽

Carl G. Zimba ◽

Laurence A. Nafie ◽

D. Warren Vidrine

Keyword(s):

Circular Dichroism ◽

Vibrational Circular Dichroism ◽

Polarization Sensitivity ◽

Polarization Modulation ◽

Optical Components ◽

New Approach ◽

Photoelastic Modulator ◽

Modulation Techniques ◽

Linearly Polarized ◽

Circular Dichroïsm

In vibrational circular dichroism (VCD) measurements and other polarization modulation techniques, artifact signals often arise due to polarization sensitivity of the optical components located subsequent to the sample. In this paper, we describe a method for demodulating the light beam after passage through the sample in such a manner that only one linearly polarized state is allowed to reach the detector, thus eliminating these artifacts. The method is a beam reversal technique in which the light subsequent to the sample is redirected through the photoelastic modulator in such a way that the retardation produced on the first traversal through the modulator is removed. The light is returned to its original state of linear polarization prior to detection. The method is applicable to Fourier transform as well as to dispersive spectrometers since demodulation is effected for all wavelengths simultaneously. The results of preliminary demodulation experiments are presented and found to be more than 90% efficient in removing circular dichroism intensity of a birefringent origin.

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A High Performance Energy Analyzer for Use in Electron Scanning Microscopy

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100061975 ◽

1969 ◽

Vol 27 ◽

pp. 14-15

Author(s):

A. V. Crewe ◽

M. Isaacson ◽

D. Johnson

Keyword(s):

High Performance ◽

Vertical Plane ◽

Median Plane ◽

Electron Gun ◽

Uniform Field ◽

Loss Mechanism ◽

Electron Scanning Microscopy ◽

Sector Type ◽

Double Focusing ◽

Electron Energy Loss

A double focusing magnetic spectrometer has been constructed for use with a field emission electron gun scanning microscope in order to study the electron energy loss mechanism in thin specimens. It is of the uniform field sector type with curved pole pieces. The shape of the pole pieces is determined by requiring that all particles be focused to a point at the image slit (point 1). The resultant shape gives perfect focusing in the median plane (Fig. 1) and first order focusing in the vertical plane (Fig. 2).

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