Directional coupler switches, modulators, and filters using alternating Δβ techniques (Invited Paper)

Abstract

The principles of operation and current status of single-mode optical directional coupler switches, modulators, and filters using <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">\Delta \beta</tex> reversal techniques are reviewed.