We have observed random fluctuations in the local Ti concentration profiles of Ti-diffused LiNbO3 waveguides. Calculations show that these variations explain the degraded switch extinction ratio (i.e., crosstalk) and other nonideal characteristics observed in LiNbO3 optical switches. We also demonstrate by calculation a new device configuration for eliminating this source of crosstalk.
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
- Electrical and Electronic Engineering