Open AccessElectro-optic deflection in a lithium niobate quasi-single mode waveguide with microstructured electrodes
Author(s) -
Fupeng Tian,
Huihui Lu,
Shiping Zhan,
Jun Tao,
Jiangli Dong,
Xinyue Zhang,
Wentao Qiu,
Heyuan Guan,
Jianhui Yu,
Yunhan Luo,
Jun Zhang,
Zhe Chen
Publication year - 2018
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.030100
Subject(s) - optics , lithium niobate , materials science , deflection (physics) , waveguide , laser beam quality , laser , electrode , voltage , optoelectronics , laser beams , physics , quantum mechanics
We propose an electro-optic mode deflection device based on an annealed proton exchange (APE) waveguide in lithium niobate, associated with isosceles-triangle-shaped array electrodes and a horn-shaped input waveguide. The input waveguide is tapered down to ensure that the output of the device has a good beam quality, i.e., a quasi-single mode in this case. This new device allows beam deflection at a relative low voltage and large deflection angle. At an APE-waveguide width of 80 μm, mode deflections of 0.265 and 0.240 μm/V are obtained for 1064 and 980 nm, respectively. This beam deflection device can be applied in high-speed optical switch, and beam smoothing of a high-power laser, etc.