Optical Design of Multilayer Achromatic Waveplate by Simulated Annealing Algorithm  

作　　者：Jun Ma Jing-Shan Wang Carsten Denker Hai-Min Wang 

机构地区：[1]Big Bear Solar Observatory 40386 North Shore Lane, Big Bear City, CA 92314, USA [2]New Jersey Institute of Technology, Center for Solar-Terrestrial Research, 323 Martin Luther Kind Blvd., Newark, NJ 07102, USA [3]Astrophysikalisches Institut Potsdam, An der Sternwarte 16, D- 14482 Potsdam, Germany [4]Currently working at Thorlabs, Inc., 435 Route 206, Newton, NJ 07860, USA

出　　处：《Chinese Journal of Astronomy and Astrophysics》2008年第3期349-361,共13页中国天文和天体物理学报（英文版）

摘　　要：We applied a Monte Carlo method -- simulated annealing algorithm -- to carry out the design of multilayer achromatic waveplate. We present solutions for three-, six- and ten-layer achromatic waveplates. The optimized retardance settings are found to be 89°51′39″ ± 0°33′37″ and 89°54′46″ ± 0°22′4″ for the six- and ten-layer waveplates, respectively, for a wavelength range from 1000 nm to 1800 nm. The polarimetric properties of multilayer waveplates are investigated based on several numerical experiments. In contrast to previously proposed three-layer achromatic waveplate, the fast axes of the new six- and ten-layer achromatic waveplate remain at fixed angles, independent of the wavelength. Two applications of multilayer achromatic waveplate are discussed, the general-purpose phase shifter and the birefringent filter in the Infrared Imaging Magnetograph （IRIM） system of the Big Bear Solar Observatory （BBSO）. We also checked an experimental method to measure the retardance of waveplates.We applied a Monte Carlo method -- simulated annealing algorithm -- to carry out the design of multilayer achromatic waveplate. We present solutions for three-, six- and ten-layer achromatic waveplates. The optimized retardance settings are found to be 89°51′39″ ± 0°33′37″ and 89°54′46″ ± 0°22′4″ for the six- and ten-layer waveplates, respectively, for a wavelength range from 1000 nm to 1800 nm. The polarimetric properties of multilayer waveplates are investigated based on several numerical experiments. In contrast to previously proposed three-layer achromatic waveplate, the fast axes of the new six- and ten-layer achromatic waveplate remain at fixed angles, independent of the wavelength. Two applications of multilayer achromatic waveplate are discussed, the general-purpose phase shifter and the birefringent filter in the Infrared Imaging Magnetograph （IRIM） system of the Big Bear Solar Observatory （BBSO）. We also checked an experimental method to measure the retardance of waveplates.

关 键 词：INSTRUMENTATION spectrographs -- methods numerical -- methods laboratory-- Sun INFRARED 

分 类 号：P111.41[天文地球—天文学]