Velocity matching of a GaAs electro-optic modulator |
| |
Authors: | Haxha Shyqyri Rahman B M Azizur Obayya Salah S A Grattan Kenneth T V |
| |
Affiliation: | School of Engineering and Mathematical Sciences, City University London, Northampton Square, London EC1V 0HB, UK. |
| |
Abstract: | New designs for the velocity matching of a deep-etched semiconductor electro-optic modulator are presented. A tantalum pentoxide (Ta2O5) coating is considered here for achieving velocity matching between the microwave and the optical signals. The effects of the velocity mismatch, the conductor loss, the dielectric loss, and the impedance mismatch are studied in relation to the optical bandwidth of a high-speed semiconductor modulator. It is shown that both the dielectric loss and the impedance matching play key roles for velocity-matched high-speed modulators with low conductor loss. The effects of Ta2O5 thickness on the overall bandwidth and on the half-wave voltage-length product VpiL are also reported. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|