title: Method to reduce sidelobes of multistage Lyot filters.
abstract: We propose a method to reduce sidelobes of multistage Lyot filters by substituting certain stages with two-plate fan Solc stages. Parallel-aligned nematic liquid crystal (LC) cells are used as variable retarders to compose multistage Lyot LC tunable filters (LCTF). The simulation of a four-stage Lyot LCTF and a tunable filter, comprising two stages of Lyot filter and two stages of two-plate Solc filter, are compared. With this method, the sidelobes are reduced and the full width at half-maximum intensity of transmission peak is also reduced. Experimental results and theoretical analysis are presented in detail to verify this method.
authors.affiliation: State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027, China.
authors.forename: Guowei
authors.initials: G
authors.lastname: Yang
authors.forename: Zhenrong
authors.initials: Z
authors.lastname: Zheng
authors.forename: Haifeng
authors.initials: H
authors.lastname: Li
authors.forename: Xu
authors.initials: X
authors.lastname: Liu