中国物理B ›› 2011, Vol. 20 ›› Issue (8): 84209-084209.doi: 10.1088/1674-1056/20/8/084209

• CLASSICAL AREAS OF PHENOMENOLOGY • 上一篇    下一篇

Attenuation characteristics of a light attenuator combined by polarizers with different extinction ratios

黄翀, 邓鹏, 赵爽, 陈海清   

  1. College of Optoelectronics Science and Engineering, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China
  • 收稿日期:2011-01-05 修回日期:2011-02-13 出版日期:2011-08-15 发布日期:2011-08-15
  • 基金资助:
    Project supported by the Technological Innovation Project of Air-to-Air Missile Institute of China (Grant No. 5S85000FS).

Attenuation characteristics of a light attenuator combined by polarizers with different extinction ratios

Huang Chong (黄翀), Deng Peng (邓鹏), Zhao Shuang (赵爽), Chen Hai-Qing (陈海清)   

  1. College of Optoelectronics Science and Engineering, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China
  • Received:2011-01-05 Revised:2011-02-13 Online:2011-08-15 Published:2011-08-15
  • Supported by:
    Project supported by the Technological Innovation Project of Air-to-Air Missile Institute of China (Grant No. 5S85000FS).

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摘要： This paper deals with a systematical analysis and an algorithm of attenuation characteristics of a light attenuator combined by n pieces of polarizers (n-LACP) whose extinction ratios are different from each other. The attenuation ratio expression of a two-LACP is deduced. We find that the monotonic attenuation interval depends on the first polarizer and that the attenuation range depends on the second one. For the three-LACP, a method for obtaining a monotonic attenuation interval is proposed. Moreover, the attenuation ratio expression is demonstrated. Analysis and experiment show that when the initial status of the three-LACP is at the maximum output, if the second or third polarizer rotates alone, the minimum attenuation ratios can reach K2-1 and K3-1, respectively, and if the first polarizer rotates, a minimum attenuation ratio of K2-1K3-1 can be obtained (K1, K2 and K3 represent the extinction ratios of the three polarizers in turn). Furthermore, the attenuation ratio expression of n-LACP and the relevant attenuation characteristics are proposed. The minimum attenuation ratio of an n-LACP is (K2K3……Kn)-1.

Abstract: This paper deals with a systematical analysis and an algorithm of attenuation characteristics of a light attenuator combined by n pieces of polarizers (n-LACP) whose extinction ratios are different from each other. The attenuation ratio expression of a two-LACP is deduced. We find that the monotonic attenuation interval depends on the first polarizer and that the attenuation range depends on the second one. For the three-LACP, a method for obtaining a monotonic attenuation interval is proposed. Moreover, the attenuation ratio expression is demonstrated. Analysis and experiment show that when the initial status of the three-LACP is at the maximum output, if the second or third polarizer rotates alone, the minimum attenuation ratios can reach K2-1 and K3-1, respectively, and if the first polarizer rotates, a minimum attenuation ratio of K2-1K3-1 can be obtained (K1, K2 and K3 represent the extinction ratios of the three polarizers in turn). Furthermore, the attenuation ratio expression of n-LACP and the relevant attenuation characteristics are proposed. The minimum attenuation ratio of an n-LACP is (K2K3……Kn)-1.

Key words: light attenuator, polarizer, extinction ratio, Jones vector

中图分类号:  (Filters, zone plates, and polarizers)

  • 42.79.Ci
42.79.Pw (Imaging detectors and sensors) 42.79.Hp (Optical processors, correlators, and modulators)