title: Dammann gratings as integratable micro-optical elements created by laser micronanofabrication via two-photon photopolymerization.
abstract: Dammann gratings, as beam splitters and coherent signal generators, were produced in a short fabricating cycle by femtosecond laser fabrication via two-photon photopolymerization. These holograms that each generated 2x2, 3x3, 4x4, 5x5, and 6x6 spot sources in the fan-out demonstrated diffraction efficiency of 36%, 25%, 29%, 52%, and 49%, respectively, comparable with the theoretical values. This work shows the promising prospect of femtosecond laser fabrication in compatibly manufacturing various micro-optical devices including Dammann gratings and their integrated systems.
authors.affiliation: State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun, China.
authors.forename: Qi-Dai
authors.initials: QD
authors.lastname: Chen
authors.forename: Xiao-Feng
authors.initials: XF
authors.lastname: Lin
authors.forename: Li-Gang
authors.initials: LG
authors.lastname: Niu
authors.forename: Dong
authors.initials: D
authors.lastname: Wu
authors.forename: Wen-Quan
authors.initials: WQ
authors.lastname: Wang
authors.forename: Hong-Bo
authors.initials: HB
authors.lastname: Sun