Volume 124, Number 5, December 2018
|Number of page(s)||6|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||02 January 2019|
Modified Sagnac imaging spectropolarimeter for full linear Stokes parameters
1 College of Mathematical and Physical Sciences, Shandong Advanced Optoelectronic Materials and Technologies Engineering Laboratory, Qingdao University of Science and Technology - Qingdao 266061, China
2 Institute of Solid State Physics, Shanxi Datong University - Datong 037009, China
3 Institute of Space Optics, School of Electronic and Information Engineering, Xi'an Jiaotong University Xi'an 710049, China
Received: 17 October 2018
Accepted: 28 November 2018
A modified Sagnac imaging spectropolarimeter is conceptually described. It consists of a spectral-polarimetric modulator, a modified Sagnac interferometer with large optical path difference, and a CCD camera. This design modulates the Stokes components of the input light into different wave numbers and obtains the modulated interferogram in snapshot mode, and the spectra of the Stokes components can be separated and demodulated from the interferogram. The performance of the system is demonstrated through a numerical simulation, and a novel method is proposed to detect the polarization parameters including the degree of polarization and polarization direction for eliminating the aliasing effects between linear Stokes parameters. Compared with the existing imaging spectrometers, the modified Sagnac imaging spectropolarimeter can acquire one-dimensional spatial information and its full linear spectropolarimetric information in one exposure, and some other spatial information can be obtained by push-broom mode.
PACS: 42.30.-d – Imaging and optical processing / 42.30.Lr – Modulation and optical transfer functions / 42.30.Va – Image forming and processing
© EPLA, 2019
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