Dammann gratings as integratable micro-optical elements created by laser micronanofabrication via two-photon photopolymerization.
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.
Chen
Qi-Dai
QD
State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun, China.
Lin
Xiao-Feng
XF
Niu
Li-Gang
LG
Wu
Dong
D
Wang
Wen-Quan
WQ
Sun
Hong-Bo
HB