Title :
Effect of substrate modes in 40 Gbit travelling wave LiNbO/sub 3/ modulators
Author_Institution :
Waveguide & Electro-Opto Res., Agere Syst., Murray Hill, NJ, USA
Abstract :
In this paper, substrate modes which influence the bandwidth of travelling wave LiNbO/sub 3/ Mach-Zehnder modulators are reviewed. Criteria for the appropriate choice of RF electrode geometry to minimize losses have been presented. Finally, the effect of backside metalization due to metallic packages has been discussed, along with suitable modifications to mitigate the losses due to the presence of the backside ground.
Keywords :
electro-optical modulation; lithium compounds; metallisation; optical communication equipment; 40 Gbit/s; LiNbO/sub 3/; RF electrode; backside ground; backside metallization; bandwidth; loss; metallic package; substrate modes; travelling wave LiNbO/sub 3/ Mach-Zehnder modulator; Coplanar waveguides; Dielectric substrates; Electrodes; Frequency; Geometry; Optical coupling; Optical losses; Optical modulation; Optical surface waves; Optical waveguides;
Conference_Titel :
Microwave Symposium Digest, 2002 IEEE MTT-S International
Conference_Location :
Seattle, WA, USA
Print_ISBN :
0-7803-7239-5
DOI :
10.1109/MWSYM.2002.1011900
