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# Lesson 1 – Getting Started

## Introduction

The OptiFDTD software has seven interdependent modules: OptiFDTD_Designer—Create the photonic devices to model OptiFDTD_Simulator—Perform the FDTD simulation and DFT analysis OptiFDTD_Analyzer—Post-process the simulated data FDTD Band Solver—Generate band diagram for photonic crystal PWE Band Solver– Band diagram analysis by PWE method Cross Section Layout Designer– Design Layout Cross Section and perform mode analysis Tool Box-…

## New Project

Create a new project The following lesson uses a micro-ring resonator as a sample design. Note: The corresponding project file can also be found in the Sample’s file folder, Sample02_3D_Ring_Resonator.fdt. To create a new project, perform the following procedures. Opening OptiFDTD_Designer Action To open OptiFDTD_Designer, from the Start menu, select Programs > Optiwave Software > OptiFDTD >…

## New Design

To draw a micro-ring resonator, first draw a linear waveguide by performing the following procedures. Drawing a Linear Waveguide Step Action 1 From the Draw menu, select Linear Waveguide. 2 In the layout window, drag the linear waveguide from the start point to the end point. A linear waveguide appears in the layout window. Note: Release…

## Input Plane

To insert the Input Plane and set the excitation, perform the following procedures. Inserting the Input Plane Step Action 1 From the Draw menu, select Vertical Input Plane. Note: –    The Vertical Input Plane is in the x-y plane for 3D. –    The Horizontal Input Plane is only functional with a 2D simulation. –    Multiple…

## Refractive Index Distribution

OptiFDTD provides a refractive index viewer to observe the refractive index distribution on any plane in three orientations. To observe the refractive index distribution, perform the following procedure. Observing the Refractive Index Distribution Step Action 1 Click the 3D Ref. Index tab at the bottom of the layout window. The 3D Refractive Index window opens.…

## Observation Points, Areas, and Lines

Observation point, Line, area, are the post-simulation detector. Field pattern, transmission function and reflection function (versus wavelength) can be obtained with these detectors: Observation Point—Observe the time domain and frequency domain response. The transmission function can be obtained from the Observation Point analysis If the point detector is put in the waveguide center where the peak value…