Title :
Thin layer design of X-cut LiNbO3 modulators
Author :
Gheorma, I.-L. ; Savi, P. ; Osgood, R.M., Jr.
Author_Institution :
Microelectron. Sci. Lab., Columbia Univ., New York, NY, USA
Abstract :
Microwave-optical velocity matching and 50 /spl Omega/ impedance matching are difficult to achieve with LiNbO/sub 3/ traveling wave modulators. We perform a detailed study (simulations) of the microwave and optical performance characteristics for modulators using thin layer (few micrometers), X-cut LiNbO/sub 3/ and find significant improvements in velocity and impedance matching together with a lower V/sub /spl pi//L.
Keywords :
impedance matching; lithium compounds; microwave photonics; optical design techniques; optical films; optical losses; optical materials; optical modulation; optical planar waveguides; ridge waveguides; thin film devices; 50 ohm; LiNbO/sub 3/; LiNbO/sub 3/ traveling wave modulators; X-cut crystal; impedance matching; microwave performance characteristics; microwave-optical velocity matching; modulators; optical performance characteristics; simulations; thin layer design; velocity matching; Dielectric losses; High speed optical techniques; Impedance matching; Optical attenuators; Optical films; Optical losses; Optical modulation; Optical refraction; Optical variables control; Sputtering;
Journal_Title :
Photonics Technology Letters, IEEE
