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Velocity matching of a GaAs electro-optic modulator
- Source :
- Applied Optics. Dec 20, 2003, Vol. 42 Issue 36, p7179, 9 p.
- Publication Year :
- 2003
-
Abstract
- New designs for the velocity matching of a deep-etched semiconductor electro-optic modulator are presented. A tantalum pentoxide ([Ta.sub.2][O.sub.5]) 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 [Ta.sub.2][O.sub.5] thickness on the overall bandwidth and on the half-wave voltage-length product [V.sub.[pi]]L are also reported. OCIS codes: 230.4110, 230.2090.
- Subjects :
- Optics -- Research
Astronomy
Physics
Subjects
Details
- Language :
- English
- ISSN :
- 1559128X
- Volume :
- 42
- Issue :
- 36
- Database :
- Gale General OneFile
- Journal :
- Applied Optics
- Publication Type :
- Academic Journal
- Accession number :
- edsgcl.112358919