Frequency-dependent propagation characteristicsofcoplanar waveguide electrode on 100 GHz Ti:LiNbO 3 optical modulator
- 2 April 1998
- journal article
- Published by Institution of Engineering and Technology (IET) in Electronics Letters
- Vol. 34 (7) , 661-663
- https://doi.org/10.1049/el:19980284
Abstract
The microwave propagation characteristics of a coplanar waveguide electrode in the frequency range 45 MHz – 110 GHz were studied in order to evaluate the factors which limit the performance of a high-speed ridged Ti:LiNbO3 optical modulator. Since the effective microwave index is constant in the higher frequency range, neither structure nor material dispersions of the modulator are observed. In addition to the conductor loss, the dielectric loss also increases above 20 GHz. The dielectric loss is shown to originate not only in the LiNbO3 substrate, but also in the silicon oxide buffer layer.Keywords
This publication has 4 references indexed in Scilit:
- Design of ultra-broad-band LiNbO/sub 3/ optical modulators with ridge structureIEEE Transactions on Microwave Theory and Techniques, 1995
- A broadband Ti:LiNbO/sub 3/ optical modulator with a ridge structureJournal of Lightwave Technology, 1995
- Performance and modeling of broadband LiNbO/sub 3/ traveling wave optical intensity modulatorsJournal of Lightwave Technology, 1994
- Broadband microwave dielectric properties of lithium niobateElectronics Letters, 1991