Electro-optic integration of embedded electrodes and waveguides in LiNbO3 using a femtosecond laser.
We describe the fabrication of a Mach-Zehnder optical modulator in LiNbO(3) by femtosecond laser micromachining, which is composed of optical waveguides inscripted by a femtosecond laser and embedded microelectrodes subsequently fabricated using femtosecond laser ablation and selective electroless plating. A half-wave voltage close to 19 V is achieved at a wavelength of 632.8 nm with an interaction length of 2.6 mm. This simple and cost-effective technique opens up new opportunities for fabricating integrated electro-optic devices.
Liao
Yang
Y
State Key Laboratory of High Field Laser Physics, Shanghai Instiute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, China.
Xu
Jian
J
Cheng
Ya
Y
Zhou
Zenghui
Z
He
Fei
F
Sun
Haiyi
H
Song
Juan
J
Wang
Xinshun
X
Xu
Zhizhan
Z
Sugioka
Koji
K
Midorikawa
Katsumi
K