Title :
Zn-Diffused 1 × 2 Balanced-Bridge Optical Switch in a Y-Cut Lithium Niobate
Author_Institution :
Southern Taiwan Univ. of Technol., Tainan
Abstract :
A novel Zn-diffused 1times2 balanced-bridge optical switch fabricated in a y-cut lithium niobate has been proposed and experimentally studied for the first time. According to the experimental results, the highly polarized waveguides with the polarization extinction ratio of about 45 dB and the nondegraded electrooptic r33 coefficient about 30.5 pm/V can be obtained for both wavelengths of 1.32 and 1.55 mum. These encouraging results indicate that the extraordinary-polarized (polarized on the extraordinary axis of the crystal) Zn-diffused waveguides can be potentially applied to the design of an integrated optical circuit being used in the field of fiber-optic gyroscopes and cable television systems.
Keywords :
electro-optical modulation; electro-optical switches; extinction coefficients; integrated optics; lithium compounds; optical design techniques; optical fabrication; optical waveguide components; zinc; LiNbO3:Zn - System; cable television systems; extraordinary-polarized waveguides; fiber-optic gyroscopes; integrated optical circuit design; nondegraded electrooptic coefficient; optical fabrication; polarization extinction ratio; wavelength 1.32 mum; wavelength 1.55 mum; y-cut lithium niobate; zinc-diffused balanced-bridge optical switch; Circuits; Electrooptical waveguides; Extinction ratio; Integrated optics; Lithium niobate; Optical design; Optical fiber polarization; Optical polarization; Optical switches; Optical waveguides; Integrated optical circuit; Zn-diffused; lithium niobate (LN); optical switch;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2007.902265
