Title :
Highly efficient 40-GHz bandwidth Ti:LiNbO/sub 3/ optical modulator employing ridge structure
Author :
Noguchi, K. ; Mitomi, O. ; Kawano, K. ; Yanagibashi, M.
Author_Institution :
NTT Opto-Electron. Lab., Kanagawa, Japan
Abstract :
The design and fabrication of a Ti:LiNbO/sub 3/ optical modulator employing a ridge structure with a shielding plane are described. The ridge structure offers a relatively low microwave propagation loss and large interaction between the microwave and optical wave under the condition of a 50 Omega characteristic impedance system, resulting in a large modulation bandwidth and low driving voltage. As a result, a 3-dB optical bandwidth of 40 GHz with a driving voltage of 3.6 V is achieved at 1.5 mu m.<>
Keywords :
electro-optical devices; integrated optics; lithium compounds; optical losses; optical modulation; optical waveguides; titanium; 1.5 micron; 3.6 V; 40 GHz; LiNbO/sub 3/:Ti; Ti:LiNbO/sub 3/ optical modulator; design; fabrication; high efficiency; impedance system; large modulation bandwidth; low driving voltage; low microwave propagation loss; optical bandwidth; optical wave; ridge structure; shielding plane; waveguides; Bandwidth; Buffer layers; Coplanar waveguides; Electrodes; Optical buffering; Optical interferometry; Optical modulation; Optical waveguides; Propagation losses; Voltage;
Journal_Title :
Photonics Technology Letters, IEEE
