2021/01/28 by A. G. de Wijn, J. de la Cruz Rodríguez, G. B. Scharmer +3
Chemistry · Engineering · Physics and Astronomy · #Broadband #Chemistry #Computer science #Electro-optic modulator #Imaging spectrometer #Optical Polarization and Ellipsometry #Optical modulator #Optics #Phase modulation #Physics #Polarization (electrochemistry) #Solar telescope #Spectrometer #Stokes parameters #Superconducting and THz Device Technology #Telescope #astro-ph.IM #astro-ph.SR #solar cell performance optimization
paper · pdf · doi:10.3847/1538-3881/abd2b1
published as AJ 161 89 (2021)
openalex publication_date 2021/01/28 · arxiv created 2021/02/01 · arxiv updated 2021/02/03 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Abstract We present the design and performance of a polychromatic polarization modulator for the CRisp Imaging SpectroPolarimeter (CRISP) Fabry–Perot tunable narrow-band imaging spectropolarimer at the Swedish 1 m Solar Telescope (SST). We discuss the design process in depth, compare two possible modulator designs through a tolerance analysis, and investigate thermal sensitivity of the selected design. The trade-offs and procedures described in this paper are generally applicable in the development of broadband polarization modulators. The modulator was built and has been operational since 2015. Its measured performance is close to optimal between 500 and 900 nm, and differences between the design and as-built modulator are largely understood. We show some example data, and briefly review scientific work that used data from SST/CRISP and this modulator.