## 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 K_{2}^{-1} and K_{3}^{-1}, respectively, and if the first polarizer rotates, a minimum attenuation ratio of K _{2}^{-1}K_{3}^{-1} can be obtained (K _{1}, K_{2} and K_{3} 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 (K_{2}K_{3} K _{n})^{-1}.

Original language | English |
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Article number | 084209 |

Journal | Chinese Physics B |

Volume | 20 |

Issue number | 8 |

DOIs | |

State | Published - Aug 2011 |

## Keywords

- Jones vector
- extinction ratio
- light attenuator
- polarizer

## ASJC Scopus subject areas

- Physics and Astronomy (all)