title: Electro-optic coupling of wide wavelength range in linear chirped-periodically poled lithium niobate and its applications.
abstract: We theoretically investigate the electro-optic coupling in an optical superlattice of linear chirped-periodically poled lithium niobate. It is found that the electro-optic coupling in such optical superlattice can work in a wide wavelength range. Some of examples, with bandwidths of 20, 40, 80, 120 nm, are demonstrated. The way to determine the electric field for perfect conversion between o- and e-ray and the method using apodized crystals of tanh profile to reduce the ripples are shown. As one of its applications, one kind of broadband Solc-type bandpass filter in optical communication range is proposed.
authors.affiliation: State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou 510275, China.
authors.forename: Xiao-qi
authors.initials: XQ
authors.lastname: Zeng
authors.forename: Li-xiang
authors.initials: LX
authors.lastname: Chen
authors.forename: Hai-bo
authors.initials: HB
authors.lastname: Tang
authors.forename: Bing-zhi
authors.initials: BZ
authors.lastname: Zhang
authors.forename: Dong-zhou
authors.initials: DZ
authors.lastname: Zhong
authors.forename: Wei-long
authors.initials: WL
authors.lastname: She