Title :
LiNbO3 Based S-Bend Waveguide Variable Optical Attenuator
Author :
Li, Xihua ; Zhou, Qiang ; Ge, Luquan ; Jiang, Xiaoqing ; Yang, Jianyi ; Wang, Minghua
Author_Institution :
Dept. of Inf. Sci. & Electron. Eng., Zhejiang Univ., Hangzhou, China
Abstract :
A novel design of a variable optical attenuator based on Ti : LiNbO3 has been proposed. The attenuation effect is improved with the help of radiation loss of S-bend optical waveguide. According to the simulation of BPM, the attenuation can be over 30 dB when applying a negative 10 V voltage, whereas, the insertion loss is less than 1.2 dB. At the same time, it has the advantage of small size and easy fabricating. The experiment result shows the attenuation can be as low as 27 dB when applying an 18.5 V negative voltage.
Keywords :
lithium compounds; niobium compounds; optical attenuators; optical waveguides; titanium; BPM; LiNbO3:Ti; S-bend optical waveguide; variable optical attenuator; voltage -10 V; voltage -18.5 V; Attenuation; Electrodes; Insertion loss; Optical attenuators; Optical refraction; Optical variables control; Optical waveguides; Refractive index; Voltage; Waveguide transitions;
Conference_Titel :
Photonics and Optoelectronics, 2009. SOPO 2009. Symposium on
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-4412-0
DOI :
10.1109/SOPO.2009.5230054
