Numerical analysis of 1.55‐µm wavelength optical deflector using arrayed waveguide with staircase‐like refractive index distribution

Abstract

SUMMARYThis paper proposes an optical deflector using an arrayed waveguide with a staircase-like refractive index profile. This device is an optical deflector using an array waveguide with the refractive index different in each of the component waveguides. Optical deflection is accomplished by application of a voltage. In order to study the deflection properties, a theoretical analysis of the structure, device parameters, deflection angle, and number of resolution points is carried out. As a method of realizing an arrayed waveguide with built-in refractive index steps, selective organometallic vapor phase epitaxial growth is used for fabrication of an array waveguide with multiple quantum well structures. Initial experimental results are reported here.

Multi‐phase‐level electro‐optical beam deflector in combined periodic polarization‐reversed structures with different thickness

“…Let Φ(y) be the phase changes in the y direction at the emission end of the deflector created by the propagation of the input light through the deflection element. In this case, the output I(φ i ) at the emission angle φ i of the input light is given by the following equation by Fresnel-Kirchhoff diffraction integration [9,10]. However, the effect of the reflection and diffraction of the input light by modifying the refractive index in the deflector is ignored as a small difference in the refractive index.…”