The effects of velocity matching, impedance matching, conductor loss, and dielectric loss on the optical bandwidth of an ultra-high-speed lithium niobate modulator are reported. It is shown that both dielectric loss and impedance matching play a key role for velocity-matched high-speed modulators with low conductor loss. The effects of etch depth, buffer thickness, electrode width, and the gap between the electrodes on device performance are also illustrated.
© 2003 Optical Society of America
Original Manuscript: September 18, 2002
Revised Manuscript: December 11, 2002
Published: May 20, 2003
Shyqyri Haxha, B. M. Azizur Rahman, and Kenneth T. V. Grattan, "Bandwidth estimation for ultra-high-speed lithium niobate modulators," Appl. Opt. 42, 2674-2682 (2003)