Time-domain optical response of an electrooptic modulator using FDTD

Author

Tomeh, Mahmoud Munes ; Goasguen, Sebastien ; El-Ghazaly, Samir M.

Author_Institution

Electr. & Comput. Eng. Dept., Purdue Univ., West Lafayette, IN, USA

Volume

49

Issue

12

fYear

2001

fDate

12/1/2001 12:00:00 AM

Firstpage

2276

Lastpage

2281

Abstract

A time-domain analysis of an LiNbO₃ electrooptic modulator using the finite-difference time-domain (FDTD) technique is performed. This allows for the calculation of optical modulation and the time-domain optical response of an electrooptic modulator. The electromagnetic fields computed by FDTD are coupled to standard electrooptic relations that characterize electrooptic interactions inside the embedded Ti diffused LiNbO₃ optical waveguides. The electric field-dependent change in the index of refraction inside these optical waveguides and resulting minute phase shifts imparted to optical signals propagating along the device are determined in time, allowing for the simulation of optical intensity modulation. This novel approach to LiNbO₃ electrooptic modulators using a coupled FDTD technique allows for previously unattainable investigations into device operating bandwidth and data transmission speed

Keywords

coplanar waveguides; electro-optical modulation; finite difference time-domain analysis; lithium compounds; optical communication equipment; optical engineering computing; optical waveguide components; optical waveguide theory; phase modulation; refractive index; FDTD; FDTD methods; FDTD technique; LiNbO₃; LiNbO₃ electrooptic modulator; coplanar waveguides; coupled FDTD technique; device data transmission speed; device operating bandwidth; electric field-dependent refractive index change; electromagnetic fields; electrooptic effects; electrooptic interactions; electrooptic modulation; electrooptic modulator; embedded Ti diffused LiNbO₃ optical waveguides; finite-difference time-domain technique; optical fiber communication; optical intensity modulation; optical modulation; optical signal propagation; optical waveguides; optoelectronic devices; phase shifts; simulation; standard electrooptic relations; time-domain analysis; time-domain optical response; Electromagnetic fields; Electromagnetic waveguides; Electrooptic modulators; Embedded computing; Finite difference methods; Optical devices; Optical modulation; Optical refraction; Optical waveguides; Time domain analysis;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.971610

Filename

971610